The scrypt key derivation function was originally developed for use in the Tarsnap online backup system and is designed to be far more secure against hardware brute-force attacks than alternative functions such as PBKDF2 or bcrypt.

Command-line client code for Tarsnap.

Kivaloo is a collection of utilities which together form a data store associating keys of up to 255 bytes with values of up to 255 bytes.

BSD-licensed C99/POSIX library code shared between tarsnap, scrypt, kivaloo, spiped, and bsdiff.

Spiped is a utility for creating symmetrically encrypted and authenticated pipes between socket addresses.

Cross-platform GUI for the Tarsnap backup service.

The public signing keys for Tarsnap Backup Inc.