Headerless crypto?

Scott Gregory Miller scgmille at indiana.edu
Mon Feb 14 12:23:48 CET 2000

I'm writing a utility that I'd like to use GPG for the crypto.
Specifically, I'd like to pass the data through GPG in conventional crytpo
mode, but without GPG outputing structural data.  I'd like just the output
of the block cipher, so that it would be indistinguishable from random
data (without the key).

There's obviously the issue of the IV, but if I specify the cipher on the
command-line (with --cipher), could it not just append the IV to the front
of the message and then on decode assume that the IV is the first n-bits
of the message?


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