Tag Archives: encryption

GSM Encryption Cracked – Eavesdropping Now Possible

Last Friday there was news out of the Chaos Computer Club Congress in Berlin that two security researchers, Karsten Nohl and Sylvian Munaut, had successfully cracked the encryption used in the GSM cellular network. While not “VoIP”, per se, this is of interest to any of us working with VoIP as many VoIP clients are now working on “smartphones” running on top of the GSM network (like, oh, the iPhone, among others). Some of the articles on this topic:

The researchers are apparently not releasing their toolkit publicly, but obviously word of their success will encourage others to investigate further.

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New Threats, Old Friends

On a lightning visit to the Infosec show in London, I chanced to meet with Ari Takanen of Codenomicon (fuzzing and quality assurance experts). Ari has a new book out: “Fuzzing for Software Security Testing and Quality Assurance”, from Artech House, available at Amazon.com and (as they say) all good bookstores. Of course, just because there’s a credit crunch doesn’t mean that security is any less of a problem, and it doesn’t mean that software defects are any the better. It sounds like Codenomicon have a pretty good market niche.

Enigma Machine

Facetime were talking about their new Unfied Security Gateway. This appliance goes beyond URL blocking and reporting, and implements reporting for VoIP and Skype, and the whole range of IM and P2P applications. In addition they have some pretty granular tools for finding out what the usage of social sites like Facebook (FB) and Myspace, and the resulting bandwidth usage might be. You can even drill down into the subsections being used (apps, music etc), which will be useful as increasingly FB is used for legitimate messaging and networking purposes in business. Facetime’s “special guest” on the stand was an original Engima encryption device, brought down from Bletchley Park (a.k.a “Station X”), the UK’s premier code-breaking museum. This is a refurbished and fully working Enigma, and on the Facetime stand they were even allowing us to have a go. I can report that it is satisfyingly mechanical to use.

AEP were also there showing some high-grade encryption equipment for enabling remote sites with access to secure systems. Law enforcement and government customers have a legal duty to protect the data that they handle, which and even remote users (or temporary sites) must protect data from snooping. Data at rest is a particular risk, and UK government agencies have embarrassingly lost large numbers of laptops and pen drives in recent years. It’s safer to leave the data in the secure site (rather than the USB stick) and access it over secure links when needed. The AEP solution fits into a laptop bag, and enables a team of people to share secure data and VoIP links to a central site, routed over any convenient satellite, 3G or WAN links.

The Infosec show is still on today and tomorrow at Earls Court exhibition centre in London.