|By Jackson Moore||
|October 4, 2001 12:00 AM EDT||
To secure your Web-based application you must close all known holes in your hardware and software as well as those you inadvertently open in your application's code.
This article addresses possible holes in your ColdFusion code that result from explicitly trusting the data your code accepts from URL parameters, form fields, cookies, browser variables, databases, or other external data sources. You must take measures to ensure that data from these sources won't cause your application to display improperly, crash, permit a security breach, or allow unintended server-side operations to be performed.
Although the exploits described in this article aren't specific to ColdFusion and many have been around for years, we'll examine ColdFusion practices for protecting your application, including data validation, encryption, and data integrity.
Untrusted Data Sources
If you conceptualize your application as a black box, any data entering that box should be validated before being processed. For Web-based applications, common sources of input that should be validated include URL parameters, form fields, cookies, browser variables, and databases.
With URLs a user can simply add, change, or delete URL parameters in the query string. Form fields might not be as obvious, but it's a trivial exercise to save a form-based HTML page on your computer, change hidden form fields, or bypass client-side validation and resubmit the form.
Likewise, a cookie can be easily manipulated by using a text editor to make a few careful changes. CGI variables that originate in the browser ("cgi.http_referer") must also be treated as suspect since they can be spoofed or blocked.
Last, and maybe least considered, are the problems that can occur by not validating data retrieved from databases. Unless yours is the only database application, your application can't blindly trust the data in the database. What would happen if another application inserted a username containing a "<" character into the database?
These are the biggest sources of untrusted data, but you must audit your own situation carefully. Other sources of untrusted data are CFFILE, CFHTTP, COM objects, and any other means of accessing data outside the direct control of your application.
What Can Happen
Improper HTML Display
Perhaps the most benign of holes, allowing user input to affect the display of your page is not only unprofessional, but is a clue to serious hackers that little or no security precautions are in place.
If you have a search form that allows users to search your Web site, you might display a response to the user such as "Your search for 'ColdFusion' resulted in a gazillion matches." But what happens if your user searches for something like "</TD>" or "<B>" or simply a "<"? This may cause your page to display improperly - reformatting your text or omitting portions of your page altogether. Furthermore, some browsers are known to crash when parsing ill-formed HTML.
Improper display can also be caused when pulling data from a database that you don't exclusively control. A database of magazine articles may contain characters that cause display problems if you don't validate the data after you retrieve it from the database.
Bypassed Client-Side Validation
Since all client-side validation, by definition, takes place on the client, a user can bypass validation code and submit the form with nonvalidated data. Users could have scripting disabled in their browser or bypass the validation code manually after saving the form to their computer.
As mentioned, "cgi.http_referer" (or any other client-side variable) can't be relied upon to verify the origin of a form submission. "cgi.http_referer" can be spoofed to make you believe that the form was submitted from your site or blocked (by a firewall or privacy software), preventing valid users from submitting forms.
For this example let's assume you have a message board where users can read and post messages, and a user enters the following:
If you're not validating this text field, every user that views your message board will be "treated" to a new window that originates from and appears to be authorized by your site. Other potentially damaging HTML tags include <OBJECT> and <APPLET>.
Serious attackers will look for any in-formation about your server configuration that allows them to identify potential holes. Those unfriendly ColdFusion error messages (see Figure 1) that are so helpful when debugging an application are a gold mine to a hacker looking to have some fun.
As you can see from this figure, the user is presented with an error message revealing a physical path on the server.
The amount of critical information displayed will depend on the type of error, your ColdFusion server settings, server platform, and database server.
Even if you employ an authentication framework, you must still validate data received from the client to prevent unauthorized access to restricted areas of your Web site. Consider a situation where you design a Web site for a magazine that wants to restrict some of the articles to subscribers only.
- Case 1: <a href="display.cfm? article_ id=14">Cover Story</a>
- Case 2: <a href="articles/2001/july/ cover.htm">Cover Story</a>
Unintended Server Operations
Holes that allow unauthorized server-side operations to be performed are the most disastrous. Some databases, for example, support multiple SQL statements inside a CFQUERY. Building on the magazine example we might construct the following query:
<cfquery name="qArticles" datasource="testDB">
SELECT article_copy FROM articles
WHERE article_id = #url.article_id#
This works fine if the URLs submitted by the user have valid article numbers, but not URLs like this:
With Microsoft SQL Server (among others) this user just deleted every record in the "articles" table. Granted, the user must know the name of your table, but through the error messages mentioned earlier or simply guessing common table names, this isn't difficult.
You need to analyze your other server software for similar "features." For example, Allaire Security Bulletin ASB99-09 (www.allaire.com/handlers/index.cfm?id=11069&method=full) warns of an issue with Microsoft Access that allows users to append VBA commands to a SQL string.
Any server software your application interfaces with that supports scripting needs to be audited for related patches. If you validate all user input, however, you're likely to avoid these vulnerabilities.
What You Can Do
ColdFusion includes two built-in methods for validating data received from form data: server-side validation using hidden <INPUT> tags and client-side validation using CFINPUT. Both methods are designed for validating form data, but, as you know, form data is just one of the many untrusted data sources you must contend with.
That said, these techniques are useful in some cases and provide built-in validation for required fields, data types such as integer and date, as well as data values such as credit card and social security numbers. The online help provides documentation and examples for each method.
Use Server-Side Validation
Furthermore, client-side validation can't perform some data validation such as preventing duplicate database records or testing uploaded files. The advantage to client-side scripting is that it provides immediate feedback to the user without a round-trip to the server for validation.
<cfinput type="text" name="firstname" required="yes">
If you don't manually scope your variables, ColdFusion looks for them in various scopes in the following order: local variables, CGI, file, URL, form, cookie, and client variables. If you don't scope variables in your code, you won't know whether they're coming from the URL, a form, or a cookie. Scoping your variables will also make your code easier to follow and give you a slight performance boost.
To prevent the display of error messages that may reveal information about your server configuration, use structured error handling (with CFTRY/CFCATCH blocks) and/or site-wide error handlers (CFERROR). This will allow you to trap any errors and continue processing your page accordingly.
Disabling the "Display the template path in error messages" setting in the ColdFusion Administrator will prevent physical paths from being displayed in most, but not all (see Figure 1), error messages that do get through to the user.
For more information on handling errors look through your back issues of CFDJ for the "Toward Better Error Handling" series (Vol. 2, issues 10 and 12, and Vol. 3, issue 2) by Charles Arehart. These are good articles that will help even beginners get up to speed on error handling.
Data Type Validation
Perhaps the single most important validation to perform is to verify the data type of suspicious data - making sure, for example, that a variable that's supposed to be a number is actually a number. This ensures that all subsequent processing of this type of data won't throw an error by performing a date operation on a nondate value or by trying to insert a nonnumeric value into a numeric database column.
Two useful tags for this purpose are CFPARAM and CFQUERYPARAM. With CFPARAM, specify the "type" attribute with any of the following data types: array, binary, boolean, date, numeric, query, string, struct, or uuid.
<cfparam name="url.myValue" type="numeric">
If the value of "url.myValue" is anything other than numeric, ColdFusion will throw an error. Using this in a meaningful way will require the use of CFTRY/CFCATCH blocks to catch the error and handle it properly.
CFQUERYPARAM tags are nested within CFQUERY tags and will give you some control over data validation. Refer to the ColdFusion documentation for CFQUERYPARAM for a list of SQL data types that can be validated. Again, ColdFusion throws an error if the validation fails.
ColdFusion also has several built-in functions (IsDate(), IsNumeric(), etc.) that allow you to determine data types without using error handling. If you need more specific data-type validations (such as integer or hexadecimal), you'll have to write your own validation code.
Another helpful ColdFusion function for validating numeric data types is Val(). Val() will return a number from the beginning of a string or 0 if the string can't be converted to a number. This function is particularly handy when dealing with a peculiar aspect of ColdFusion's support for scientific notation.
ColdFusion treats the value "1D2" the same as "1E2" - both are scientific notations for "100". ColdFusion considers both values to be valid numeric values, but your database probably won't even if it supports scientific notation. Using the Val() function will ensure that the value is converted to the more recognized scientific notation format:
#val("1d2")# <!--- 100 --->
#val("1d13")# <!--- 1E+013 --->
For example, if your user enters his or her age into a form as "3D1" (30), you want to make sure that inserting this value into your database won't cause an error even though this is a valid number in ColdFusion.
Data Value Validation
While data-type validation should prevent errors in subsequent ColdFusion code, it doesn't ensure that the value of the data is acceptable. Consider again our example of the magazine Web site. Some articles are available to the general public, while others are available only to subscribers.
If the user manually changes "article_id" to a different (but valid) integer, should the user be presented with the article carte blanche? In this example the answer is no. For each article the user requests, we must authenticate and verify that he or she is allowed to view the requested article. You can't assume that users won't try to guess new paths or values for URL parameters, form fields, or cookies in order to access restricted portions of your Web site.
Another case where data value validation is critical is when the range of legal data values for a data type in ColdFusion differs from your database. ColdFusion, for example, considers dates as large as December 31, 9999, as valid dates. In SQL Server 7, the "datetime" data type will accept this value, but the "smalldatetime" data type won't. To prevent database errors with date data types, you need to ensure that the date value is within an acceptable range for your database column.
There are many other reasons why you need to validate the value of a piece of data, not just its data type. Preventing duplicate records in a database or making sure the length of a string value is within acceptable minimum and maximum lengths are additional examples of when the value of the data must be validated. The bottom line is that (just like data types) you can't make any assumptions about the value of data received from a client.
Defining Character Sets
Validating string data presents its own set of unique challenges since there are many special characters reserved by ColdFusion, URLs, HTML, and database software. Because ColdFusion doesn't have any built-in validation functionality like Perl's taint-checking mechanism, it's the developer's responsibility to perform all necessary string validations.
In nearly all cases you'll protect yourself better by first defining which characters to allow and then making sure that the suspect string contains only those characters. This is preferable to defining which characters are illegal (though this may seem easier to implement), because it's very easy to forget one and it reduces your vulnerability to (as yet) unknown exploits.
As an example, let's consider a form field that accepts a username field and requires all usernames to contain only letters. It's safer to verify that only letters are submitted as opposed to checking for all possible illegal characters. You can use a regular expression to verify that no other character is allowed:
<cfif refindnocase("[^a-z]",form.username) neq 0>
<!--- invalid username --->
The validation becomes more complicated for string data that has to be more flexible. Our example of the cross-site scripting exploit was due to a developer allowing <SCRIPT> tags in message board posts. This particular example could have been avoided by defining a character set that excluded the "<" and ">" characters. But what if you want to allow users to use <B>, <I>, and <U> for formatting purposes within their message post? Now you have to allow some tags but not others.
As with defining single character sets, you're far safer determining which HTML tags to allow as opposed to identifying the tags that may potentially cause problems. I take issue with some of the available custom tags that focus on which HTML tags to disallow because future additions to the HTML specification or browser-specific tags may require you to revisit your code.
If you want to allow bold, italic, and underline formatting in your message posts, allow only those and disallow all others. The following code will remove all tags except for <B></B>, <I></I>, and <U></U>:
This, of course, won't validate the HTML to ensure it's well formed. Limiting the allowable HTML tags will minimize the amount of validation needed since you don't want to have errors caused by a user who failed to provide an end tag or improperly nested certain tags. If the user leaves out a "</B>" tag, you won't have a problem if the message post is encapsulated in a table cell. However, a misplaced <DIV> or </TD> can really wreak havoc on the display of your page or crash the browser.
Another approach is to encrypt the data that appears in URLs, form fields, and cookies. Consider the earlier example of the magazine Web site: if we encrypt "article_id" our link might look like:
The new value of "article_id" makes it less obvious to the user how "article_id" is used. Curious users may still tamper with the value, but after failing once or twice will give up.
ColdFusion offers two complementary functions, Encrypt() and Decrypt(), to perform encryption. They both take a string to encrypt as well as a key to use in the encryption process.
Encrypt()'s XOR-based encryption, though useful, is weak compared to encryption methods (such as that used in 128-bit SSL) considered secure by today's standards. Encrypt() shouldn't be used for sensitive information (credit card numbers or medical information), but it can be used to prevent most attempts to casually change "nonsensitive" values in URLs, form fields, and cookies.
Strings encrypted with Encrypt() can contain many potentially damaging characters (new lines, form feeds, backspaces, greater-than signs, carriage returns, etc.):
encrypt("Macromedia","key") = *=(IX 0B@5M%$V#\!
The last character (which you can't see) is a new line character. Practical use of the Encrypt() function will generally require another encoding step such as URLEncodedFormat() to escape all illegal characters in the string. Your decryption process then becomes a two-step process as well - decode and decrypt.
Another drawback to the Encrypt() function is that there's no data integrity check to ensure that the encrypted string hasn't been tampered with. Using the above example I decrypted the encrypted string, but changed the number 5 to 2:
decrypt("*=(IX 0B@2M%$V#\! ","key") = Macromydia
As you can see, the decrypted string was successfully decrypted but resulted in a value different from the original.
At the risk of losing some objectivity, I'll mention a tag I wrote called CF_CRYP (available from the Developers Exchange, http://devex.allaire.com/developer/gallery/). CF_CRYP builds on the default encryption of the Encrypt() function, but encodes the resulting string and adds a checksum.
The result is an encrypted string containing only numbers and letters with a checksum. Changing a single character in a CF_CRYP-encrypted string can be detected because the checksum of the decrypted value won't match the checksum of the original unencrypted value. CF_CRYP also provides a return structure with error information so you can detect tampering and, potentially, block that user from further access.
Using CF_CRYP to encrypt a value of "14" with a key of "somekey" produces "0101J442509E78541". To access the subscriber-only articles, the user would have to know the encoding scheme, key, and recalculate the checksum. This is a good solution for this example because if the encryption scheme was broken, the worst that can happen is an unauthorized user views some subscriber-only articles. If this happens, you should probably give the user a free subscription to your magazine anyway!
CFCONTENT will allow you to place content outside of your Web root directory and still send the content to a user. This is preferable when the files (PDF documents, video clips, etc.) require some type of user authentication to access. Since these files exist on your server outside of the Web root, users can't access the file with any URL. To view the file they have to access a page where you should authenticate them and use CFCONTENT to deliver the file.
Since many of the most damaging server-side operations are unauthorized database operations, your database authentication framework should be audited. Carefully review the operations that users need to be able to perform and then limit the SQL operations that can be performed under that user account. Generally speaking, regular users should be restricted to SELECT statements and, in some cases, UPDATE and INSERT.
Even if a user manages to get multiple commands through to your server, only those operations authorized for this user would be allowed. You must combine this type of security with the other guidelines in this article since even a benign SELECT operation can allow a user to view unauthorized content. If you use other server-side applications (including COM objects), take advantage of any built-in user authentication.
Most databases will also allow you to perform data validation at the database level. This is a good solution when you have numerous applications inserting data into a database. By moving some data validation to the database, you can remove redundant validation routines from each application.
Most users are honest people using your application for the purpose it was designed for. However, a small group of users (some armed with homegrown HTTP clients) will attempt to exploit any holes that exist in your code. Form fields, cookies, and browser variables are just as likely as URL parameters (maybe more so since they're less obvious to inexperienced developers) to contain hack attempts.
Taken together, the techniques presented in this article will help you protect your application from any malicious data sent by a user. Whether the data is tampered with accidentally or on purpose, it's your job as the developer to close these code-level holes.
- "Security Best Practice: Validating Browser Input": www.allaire.com/handlers/index.cfm?id=14558&method=full
- "Cross-Site Scripting Vulnerability Information": www.allaire.com/handlers/index.cfm?id=14557&method=full
- "Multiple SQL Statements in Dynamic Queries":www.allaire.com/handlers/index.cfm?id=8728&method=full
- "Understanding Malicious Content Mitigation for Web Developers": www. cert.org/tech_tips/malicious_code_mitigation.html
WebRTC: together these advances have created a perfect storm of technologies that are disrupting and transforming classic communications models and ecosystems. In his session at WebRTC Summit, Cary Bran, VP of Innovation and New Ventures at Plantronics and PLT Labs, will provide an overview of this technological shift, including associated business and consumer communications impacts, and opportunities it may enable, complement or entirely transform.
Oct. 10, 2015 02:15 AM EDT Reads: 759
SYS-CON Events announced today that Dyn, the worldwide leader in Internet Performance, will exhibit at SYS-CON's 17th International Cloud Expo®, which will take place on November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Dyn is a cloud-based Internet Performance company. Dyn helps companies monitor, control, and optimize online infrastructure for an exceptional end-user experience. Through a world-class network and unrivaled, objective intelligence into Internet conditions, Dyn ensures traffic gets delivered faster, safer, and more reliably than ever.
Oct. 10, 2015 02:00 AM EDT Reads: 652
WebRTC services have already permeated corporate communications in the form of videoconferencing solutions. However, WebRTC has the potential of going beyond and catalyzing a new class of services providing more than calls with capabilities such as mass-scale real-time media broadcasting, enriched and augmented video, person-to-machine and machine-to-machine communications. In his session at @ThingsExpo, Luis Lopez, CEO of Kurento, will introduce the technologies required for implementing these ideas and some early experiments performed in the Kurento open source software community in areas ...
Oct. 10, 2015 01:00 AM EDT Reads: 757
Too often with compelling new technologies market participants become overly enamored with that attractiveness of the technology and neglect underlying business drivers. This tendency, what some call the “newest shiny object syndrome,” is understandable given that virtually all of us are heavily engaged in technology. But it is also mistaken. Without concrete business cases driving its deployment, IoT, like many other technologies before it, will fade into obscurity.
Oct. 10, 2015 12:00 AM EDT Reads: 176
Today air travel is a minefield of delays, hassles and customer disappointment. Airlines struggle to revitalize the experience. GE and M2Mi will demonstrate practical examples of how IoT solutions are helping airlines bring back personalization, reduce trip time and improve reliability. In their session at @ThingsExpo, Shyam Varan Nath, Principal Architect with GE, and Dr. Sarah Cooper, M2Mi's VP Business Development and Engineering, will explore the IoT cloud-based platform technologies driving this change including privacy controls, data transparency and integration of real time context w...
Oct. 9, 2015 10:15 PM EDT Reads: 145
Who are you? How do you introduce yourself? Do you use a name, or do you greet a friend by the last four digits of his social security number? Assuming you don’t, why are we content to associate our identity with 10 random digits assigned by our phone company? Identity is an issue that affects everyone, but as individuals we don’t spend a lot of time thinking about it. In his session at @ThingsExpo, Ben Klang, Founder & President of Mojo Lingo, will discuss the impact of technology on identity. Should we federate, or not? How should identity be secured? Who owns the identity? How is identity ...
Oct. 9, 2015 10:00 PM EDT Reads: 453
The IoT market is on track to hit $7.1 trillion in 2020. The reality is that only a handful of companies are ready for this massive demand. There are a lot of barriers, paint points, traps, and hidden roadblocks. How can we deal with these issues and challenges? The paradigm has changed. Old-style ad-hoc trial-and-error ways will certainly lead you to the dead end. What is mandatory is an overarching and adaptive approach to effectively handle the rapid changes and exponential growth.
Oct. 9, 2015 10:00 PM EDT Reads: 249
The buzz continues for cloud, data analytics and the Internet of Things (IoT) and their collective impact across all industries. But a new conversation is emerging - how do companies use industry disruption and technology enablers to lead in markets undergoing change, uncertainty and ambiguity? Organizations of all sizes need to evolve and transform, often under massive pressure, as industry lines blur and merge and traditional business models are assaulted and turned upside down. In this new data-driven world, marketplaces reign supreme while interoperability, APIs and applications deliver un...
Oct. 9, 2015 08:00 PM EDT Reads: 320
Electric power utilities face relentless pressure on their financial performance, and reducing distribution grid losses is one of the last untapped opportunities to meet their business goals. Combining IoT-enabled sensors and cloud-based data analytics, utilities now are able to find, quantify and reduce losses faster – and with a smaller IT footprint. Solutions exist using Internet-enabled sensors deployed temporarily at strategic locations within the distribution grid to measure actual line loads.
Oct. 9, 2015 06:30 PM EDT Reads: 143
The Internet of Everything is re-shaping technology trends–moving away from “request/response” architecture to an “always-on” Streaming Web where data is in constant motion and secure, reliable communication is an absolute necessity. As more and more THINGS go online, the challenges that developers will need to address will only increase exponentially. In his session at @ThingsExpo, Todd Greene, Founder & CEO of PubNub, will explore the current state of IoT connectivity and review key trends and technology requirements that will drive the Internet of Things from hype to reality.
Oct. 9, 2015 05:30 PM EDT Reads: 124
The Internet of Things (IoT) is growing rapidly by extending current technologies, products and networks. By 2020, Cisco estimates there will be 50 billion connected devices. Gartner has forecast revenues of over $300 billion, just to IoT suppliers. Now is the time to figure out how you’ll make money – not just create innovative products. With hundreds of new products and companies jumping into the IoT fray every month, there’s no shortage of innovation. Despite this, McKinsey/VisionMobile data shows "less than 10 percent of IoT developers are making enough to support a reasonably sized team....
Oct. 9, 2015 04:00 PM EDT Reads: 252
You have your devices and your data, but what about the rest of your Internet of Things story? Two popular classes of technologies that nicely handle the Big Data analytics for Internet of Things are Apache Hadoop and NoSQL. Hadoop is designed for parallelizing analytical work across many servers and is ideal for the massive data volumes you create with IoT devices. NoSQL databases such as Apache HBase are ideal for storing and retrieving IoT data as “time series data.”
Oct. 9, 2015 03:45 PM EDT Reads: 510
Today’s connected world is moving from devices towards things, what this means is that by using increasingly low cost sensors embedded in devices we can create many new use cases. These span across use cases in cities, vehicles, home, offices, factories, retail environments, worksites, health, logistics, and health. These use cases rely on ubiquitous connectivity and generate massive amounts of data at scale. These technologies enable new business opportunities, ways to optimize and automate, along with new ways to engage with users.
Oct. 9, 2015 02:00 PM EDT Reads: 191
The IoT is upon us, but today’s databases, built on 30-year-old math, require multiple platforms to create a single solution. Data demands of the IoT require Big Data systems that can handle ingest, transactions and analytics concurrently adapting to varied situations as they occur, with speed at scale. In his session at @ThingsExpo, Chad Jones, chief strategy officer at Deep Information Sciences, will look differently at IoT data so enterprises can fully leverage their IoT potential. He’ll share tips on how to speed up business initiatives, harness Big Data and remain one step ahead by apply...
Oct. 9, 2015 01:45 PM EDT Reads: 566
There will be 20 billion IoT devices connected to the Internet soon. What if we could control these devices with our voice, mind, or gestures? What if we could teach these devices how to talk to each other? What if these devices could learn how to interact with us (and each other) to make our lives better? What if Jarvis was real? How can I gain these super powers? In his session at 17th Cloud Expo, Chris Matthieu, co-founder and CTO of Octoblu, will show you!
Oct. 9, 2015 01:15 PM EDT
SYS-CON Events announced today that ProfitBricks, the provider of painless cloud infrastructure, will exhibit at SYS-CON's 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. ProfitBricks is the IaaS provider that offers a painless cloud experience for all IT users, with no learning curve. ProfitBricks boasts flexible cloud servers and networking, an integrated Data Center Designer tool for visual control over the cloud and the best price/performance value available. ProfitBricks was named one of the coolest Clo...
Oct. 9, 2015 01:00 PM EDT Reads: 805
As a company adopts a DevOps approach to software development, what are key things that both the Dev and Ops side of the business must keep in mind to ensure effective continuous delivery? In his session at DevOps Summit, Mark Hydar, Head of DevOps, Ericsson TV Platforms, will share best practices and provide helpful tips for Ops teams to adopt an open line of communication with the development side of the house to ensure success between the two sides.
Oct. 9, 2015 01:00 PM EDT Reads: 620
SYS-CON Events announced today that IBM Cloud Data Services has been named “Bronze Sponsor” of SYS-CON's 17th Cloud Expo, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. IBM Cloud Data Services offers a portfolio of integrated, best-of-breed cloud data services for developers focused on mobile computing and analytics use cases.
Oct. 9, 2015 12:00 PM EDT Reads: 744
SYS-CON Events announced today that Sandy Carter, IBM General Manager Cloud Ecosystem and Developers, and a Social Business Evangelist, will keynote at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA.
Oct. 9, 2015 11:15 AM EDT
Developing software for the Internet of Things (IoT) comes with its own set of challenges. Security, privacy, and unified standards are a few key issues. In addition, each IoT product is comprised of at least three separate application components: the software embedded in the device, the backend big-data service, and the mobile application for the end user's controls. Each component is developed by a different team, using different technologies and practices, and deployed to a different stack/target - this makes the integration of these separate pipelines and the coordination of software upd...
Oct. 9, 2015 09:00 AM EDT Reads: 299