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From cypherpunks-request@toad.com Fri Mar 5 15:32:07 1993 Date: Fri, 5 Mar 93 18:20:30 -0500 From: Theodore Ts'o <tytso@Athena.MIT.EDU> Message-Id: <9303052320.AA02319@SOS> To: Bob Stratton <strat@intercon.com> Cc: cypherpunks@toad.com In-Reply-To: Bob Stratton's message of Fri, 5 Mar 1993 03:51:59 -0500, <9303050351.AA59962@horton.intercon.com> Subject: Re: Encrypted voice protocol? Address: 1 Amherst St., Cambridge, MA 02139 Phone: (617) 253-8091

Date: Fri, 5 Mar 1993 03:51:59 -0500 From: Bob Stratton <strat@intercon.com>

I don't know how many of you are at sites on the MBONE, or multicast backbone. There are already a few pieces of code out there for experimentation with transmission of audio and video information, in a variety of forms/encoding, and probably the most widely used tool, "vat - the Visual Audio Tool", already has provisions for carrying on encrypted audio teleconferences via IP. In fact, it's as simple as typing a key into a field, and the tool will DES en/decrypt the conference.

That's a good start! Now all we need something which is a bit more general in its selection of the asymmetric encryption algorithm, and something which does public key for authentication and protection of the assymetric session key.

- Ted

would suggest a diffie-hellman key exchange protocol to ensure non-recovery of the session key... BTW at least your hearts in the right place Ted... cheers kelly --