All-Or-Nothing-Transform

This crate is a very early stage of development. It is intended to implement the "Package Transform" (All-Or-Nothing-Transform) as described by Ron L. Rivest in his paper "Chaffing and Winnowing: Confidentiality without Encryption"

Some relevant wikipedia links:

• Chaffing and Winnowing
• All-or-nothing-transform

Currently Implemented

• encode and decode using SHA-1 on a message stored in memory

Future Direction

• Add high-level routines to encode/decode files
• Add option to output public parameter at start of message/stream
• Symmetric option to read that during decoding
• Generic version that works with any hash routine that implements Digest
• Add support for different ways of combining hash parameters (currently concatenated, implement xor)
• Add support for turning encryption algorithms into digest functions (eg, AES-CBC)
• Write inner/outer (en/de)coding algorithms as traits implementing Digest(?)