Re: Telnet Encryption Specification

[Marc Horowitz <marc at cygnus.com>]

"Theodore Y. Ts'o" <tytso at MIT.EDU> writes:

>> The fix for this would be to use CBC(*), but that has the down side of
>> being slower and requiring more bytes on the wire, since telnet is a
>> character-at-a-time protocol, and CBC requiers that you block data into
>> 8 byte chunks.  (The advantage of CFB and OFB is that they work well
>> with streaming protocols.)

Just as a point of reference, I regularly use ssh (which has quite a
bit of overhead) for interactive traffic over a modem, and I can't
detect any difference in latency over a non-protected connection.  I
think the days where we need to worry about the extra overhead are
also over.

		Marc