---------- Forwarded message ---------- From: Tom Ritter <tom@ritter.vg> Date: Mon, Aug 18, 2014 at 9:58 AM Subject: [cryptography] JackPair Voice Encryption Dongle To: Randombit List <cryptography@randombit.net> https://www.kickstarter.com/projects/620001568/jackpair-safeguard-your-phone... https://www.youtube.com/watch?v=rh6yF79FkAA DH with a 'Pairing Code' (ala ZRTP) to prevent MITM. Light on exact details, but they say it will be open source. "we think 10-12 digits [for a pairing code] is probably good enough, and more friendly for human reading" "We are using Diffie-Hellman at this point, and working on Elliptic curve Diffie-Hellman." "Synchronous stream cipher is used, with XOR'ed key-stream resulted from pseudo random number generator using OTSK as seed, and periodic marker flag for re-synchronization." "JackPair uses audio codec from Codec2, which has reasonable good sound quality at 1.2kbps. We have tested JackPair on top of GSM AMR 4.75 (Adaptive Multi-Rate, 4.75kbps) and HR (Half-Rate, 6.5kbps)." "Unlike traditional fax-modem technologies, our modem is designed from scratch to fight off the optimization done by GSM codec, including memory-less codec, voice activity detection (VAD)., automatic gain control (AGC) etc.. Basically we have to use synthesized voice to make mobile phones & media servers believe our signal is human voice, not just modulated waves." -tom _______________________________________________ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography