Data loss protection for source code

Scopes of Data loss in SDLC
In a post Wikileaks age the software engineering companies should probably start sniffing their development artifacts to protect the customer’s interest. From requirement analysis document to the source code and beyond, different the software artifacts contain information that the clients will consider sensitive. The traditional development process has multiple points for potential data loss – external testing agencies, other software vendors, consulting agencies etc. Most software companies have security experts and/or business analysts redacting sensitive information from documents written in natural language. Source code is a bit different though.

A lot companies do have people looking into the source code for trademark infringements, copyright statements that do not adhere to established patterns, checking if previous copyright/credits are maintained, when applicable. Blackduck or, Coverity are nice tools to help you with that.

Ambitious goal

I am trying to do a study on data loss protection in source code – sensitive information or and quasi-identifiers that might have seeped into the code in the form of comments, variable names etc. The ambitious goal is detection of such leaks and automatically sanitize (probably replace all is enough) such source code and retain code comprehensibility at the same time.

To formulate a convincing case study with motivating examples I need to mine considerable code base and requirement specifications. But no software company would actually give you access to such artifacts. Moreover (academic) people who would evaluate the study are also expected to be lacking such facilities for reproducibility. So we turn towards Free/Open source softwares. Sourceforge.net, Github, Bitbucket, Google code – huge archives of robust softwares written by sharpest minds all over the globe. However there are two significant issues with using FOSS for such a study.

Sensitive information in FOSS code?

Firstly, what can be confidential in open source code? Majority of FOSS projects develop and thrive outside the corporate firewalls with out the need for hiding anything. So we might be looking for the needle in the wrong haystack. However, being able to define WHAT sensitive information is we can probably get around with it.

There are commercial products like Identity Finder that detect information like Social Security Numbers (SSNs), Credit/Debit Card Information (CCNs), Bank Account Information, any Custom Pattern or Sensitive Data in documents. Some more regex foo or should be good enough for detecting all such stuff …

#/bin/sh
SRC_DIR=$1
for i in `cat sensitive_terms_list.txt`;do
for j in `ls $SRC_DIR`; do cat $SRC_DIR$j | grep -EHn --color=always $i ; done
done


Documentation in FOSS

Secondly, the ‘release early, release often’ bits of FOSS make a structured software development model somewhat redundant. Who would want to write requirements docs, design docs when you just want to scratch the itch? The nearest in terms of design or, specification documentation would be projects which have adopted the Agile model (or, Scrum, say) of development. In other words, a model that mandates extensive requirements documentation be drawn up in the form of user stories and their ilk. being a trivial example.

Still Looking
What are some of the famous Free/Open Source projects that have considerable documentation closely resembling a traditional development model (or models accepted in closed source development)? I plan to build a catalog of such software projects so that it can serve as a reference for similar work that involve traceability in source code and requirements.

Possible places to look into: (WIP)
* Repositories mentioned above
* ACM/IEEE
* NSA, NASA, CERN

Would sincerely appreciate if you leave your thoughts, comments, poison fangs in the comments section … 🙂

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