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Finally ZRTP has been assigned an official RFC assignment, RFC6189 ZRTP: Media Path Key Agreement for Unicast Secure RTP.

It had as a dependency the SRTP with AES key size of 256bit that now has been defined as RFC6188.

It’s exciting to see the RFC finally released, as it’s an important milestone to set ZRTP as the official standard for end-to-end encryption much like PGP has been for emails.

Now any organization in the world will be officially able to implement ZRTP for end-to-end protocol voice encryption

Currently 3 different public implementations of ZRTP protocol exists:

• Philip Zimmermann’s LibZRTP (c code)
• PrivateWave’s ZORG (c++ code / Java code)
• GNU Telephony ZRTP (c++ code / Java code)

Each of them provide different features of the protocol, but most important are known to be interoperable.

A new wave is coming to the voice encryption world, irrupting into a gray area where most of the companies doing phone encryption systems has been implementing custom encryption.

Now a standard has been setup and there are few reasons left to implementing something different.

Hurra Mr. Zimmermann and all the community of companies (like PrivateWave) and individuals (like Werner Dittmann) that worked on it!

Today it’s a great day, such kind of technology is now official and also with multiple existing implementation!

Philip, you did it again, my compliments to your pure spirit and determination :-)