I've done a simple chaffing and winnowing implementation, and would like to invite everyone interested to have a look and give comments. download: ftp://ftp.lemuria.org/pub/Code/Shaft-0.1.tar.gz requires: openssl (for hmac) the program consists of two parts: shaft will encode/decode, while shaftsort will sort the chunk within a file. shaftsort has two purposes: first, shaft relies on sorted input when decoding. second, the standard shaft output is sorted by input files, which makes the whole chaffing process more or less irrelevant. bugs: some trailing zeros in final output, and shaftsort still retains the "order by input file", which is a Bad Thing(tm). it should take all the chunks with identical sequence numbers and resort them randomly or by some arbitrary definition ("first 3 data bytes"). usage: see the test.sh or the source. basically, for encryption, shaft wants input files and keys/passwords on the commandline. for decryption it wants just one key. shaftsort is a filter (stdin to stdout).