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Earlier this year, we submitted a bug to Google for the Google Authenticator app on Android. Basically, the bug we submitted is that the secret key (the private code that when combined with an accurate source of time creates the one-time-use codes for use with Google’s open-sourced two factor authentication) is stored in the clear on Android devices. Google’s response was that this was behaving by design, and that not the system controls around the filesystem are sufficient to protect this information. We humbly disagree. Rooted devices get around these system controls that protect these secret keys. So would any malware that performed a privilege escalation exploit. And most importantly, backups of the phone (using a tool such as Titanium Backup) contains these secret[…]

When I first read the article Authy Makes Using Two-Factor Authentication Easier I thought to myself, “why have I never heard of this Authy thing?” After all, we have been covering two-factor for a while. I went ahead and installed it, and started digging into the application and the company. I even fired off some questions about how they treat the information in the application and I’m impressed. This application is advancing the state of the art for two-factor authentication by making it not just simpler to use, but more secure as well. This article is covering how Authy is simplifying the use of two-factor authentication. Next week I’ll publish another article about how they are also advancing the state of[…]

There are quite a few tools readily known to the Android reversing community. The primary one is most likely smali/baksmali. It’s an open source tool which will decompile/compile an android dex format which is used by dalvik the native Android VM, into a format known as smali, which is very similar to an assembly language. A lot of people even like dex2jar, which further enhances the experience and takes a broken down apk, and pulls out the compiled dex classes. With dex2jar you can further that and attempt to get some readable jar files. If you wanted to make it even simpler you continue with that jar and use something like JD-GUI to read those jars back into native java code and be off running. For the lazy, there’s also the apktool which does most of the above for you in a simple one-stop-shop.

These are all great tools, but what else is out there? That’s what I’ll be covering in the next few articles. Today I’d like to point your attention to JEB (http://java-decompiler.com). I discovered this back in February when it made its first public release. At the time, I was knee deep in doing Android Application Security Assessments as part of our IPA process. I was still primarily using the tools mentioned above, so it was nice not only to find something different (it doesn’t use the open source smali as the decompiler), and it’s a nice all-in-one solution for exploring the code, as well as analyzing it.

Last week at the RSA Conference I had the opportunity to attend the “Mobile Security Battle Royale“, featuring a great panel of experts on mobile phone security. Moderated by Zach Lanier, the panel featured Tiago Assumpção and Collin Mulliner paired off against Charlie Miller and Dino Dai Zovi (co-authors of iOS Hacker’s Handbook).  As many great panels typically do, this panel featured no slides and no set talking points. Instead, Zach asked the panel some great questions to just get the ball rolling, and the panel started firing off great quotes left and right. I got busy live-tweeting the session and got (and re-tweeted) a few great quotes from many of the panel members which I have embedded below. One of the recurring themes was “which is[…]