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As a result, it wasn’t useful in understanding the codebase and was mostly ignored.Īction: Compile the application with full debug support.Īction: Load the application into a code review tool (Source Insight) Review: Survey the application dependencies and third party libraries in use Outcome: The documentation appeared to provide a nice roadmap that can assist in development, however is mostly lacking in content.

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Download the source code.Īction: Review the websites user and developer documentation. Select first candidate based on check boxes.Īction: Visit the application website, review its intended user base / functionality. The table below is a general run-through of our activities during this timeframe: HourĪction: Review the applications on the EFF scorecard.

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The review was executed over 24 hours (spanning a few weeks), performing manual code review and proof-of-concept development for select findings. The reviews themselves will be time constrained to up to 24 hours of effortĪny identified vulnerabilities will be reported following responsible disclosure practices. The focus of reviews will be on implementation vulnerabilities and not design level issues in cryptography or architecture, We placed several constraints on ourselves for the purpose of the review, hoping the results could be extrapolated to form an opinion on the overall code quality of the application: The application itself was chosen from the scorecard in a semi-random fashion, namely it received top marks in all columns except for “Has there been any recent code audit?” which peaked our curiosity. It supports features such as Chat, Voice and Video, Mail, File Sharing, Forums, Channels and Tor. This application enables users to create encrypted connections to friends over a decentralized network.

To begin the discussion, we chose to perform a code review of Retroshare. We believe sharing this perspective is important to assist users in deciding on the right balance between privacy and security.

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This is a subtle and often overlooked difference - as passive monitoring may be disrupted with the use of encrypted communications, but attacks against software vulnerabilities can negate the advantage of using those IM applications in the first place. This blog post is the first in a series, in which we review the documentation and source code of a subset of applications in the EFF scorecard to understand their privacy versus security tradeoffs. This is amplified when using an application which has not undergone the same rigorous testing of time and usage that more popular (yet less “privacy conscious”) applications have. While the advocacy of privacy based communication is something we love to see reach a mainstream audience, we believe the scorecard misses many considerations and metrics that are critical to the discussion.Īs is commonly understood by those in the security community it’s a very hard problem to quantify, and it’s important to consider how the more functionality an application has, the higher degree of risk it poses due to an increase in attack surface.

This type of score card drastically simplifies the problem domain, and leads one to question what the tradeoffs are when installing an application from the list. One particularly interesting website is the Electronic Frontier Foundation (EFF) secure messaging scorecard, which aims to assist users in choosing “Which apps and tools actually keep your messages safe”. It’s not uncommon to find news articles written almost weekly on user privacy concerns and what the more tech savvy can do to limit their exposure to interception and monitoring from external parties. In recent years, the importance of using secure private messaging applications for communication has come to the forefront of public attention.