Re: A poorman's block encryption algorithm

rossum wrote:

If you are prepared to move away from block cyphers to a stream cypher
then RC4 is easily memorisable and programmable from memory. It is
not perfectly secure but is certainly easily memorized.

If I don't err, stream ciphers have difficulties in issues of
authentication. That's why I considered block encryption. (Note in this
respect that the scheme depicted allows large block sizes.)


M. K. Shen