At 6:36 AM 1/30/96 -0500, Alexandra Griffin wrote:
Is there any software out there on the net for doing real-time, transparent encryption of a PPP link? ... Finally, could someone make a ballpark estimate as to the amount of additional latency that would be added?
Ballpark estimate: If the encryptor receives a complete packet before encrypting and forwarding it then there would be an additional packetSize/byteRate + encryptionTime seconds added to the packet's transit time. If the encryptor encrypts "on the fly", passing the bits of a packet as their are received, then it would add almost no latency. However, the encryption algorithms would be limited to stream cyphers, which have security and error recovery implications. See "Applied Cryptography" for details. ----------------------------------------------------------------- Bill Frantz Periwinkle -- Computer Consulting (408)356-8506 16345 Englewood Ave. frantz@netcom.com Los Gatos, CA 95032, USA