Skip to content

neilsagarwal/hpc

master
Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
Code

Latest commit

 

Git stats

Files

Permalink
Failed to load latest commit information.
Type
Name
Latest commit message
Commit time
 
 
 
 
 
 

Hasty Pudding Cipher

Introduction

This repository provides an implementation of the Hasty Pudding Cipher in Python.

Hasty Pudding Cipher (HPC) was designed by Richard Schroeppel for the AES competition. HPC is an example of a 'tweakable block cipher', a cipher that takes in a secondary "lightweight" key (a tweak) for further entropy.

The implementation was derived from the publicly available HPC specification.

Python

Sample Usage:

from hpc import generate_hpc_functions

blocksize = 10
backup = 0
key_length = 128
key = 0xf3aef8062681d980c14bd5915305f319

# generate cipher functions
encrypt, decrypt = generate_hpc_functions(key, blocksize, key_length, backup)

ptxt = 0x0000000000000079
spice = 0x4957df9f02329f2d07289bb61a440e059f9c5dcb93048b5686208a26403c5e7f706d0051cdb0d7bb8f0c6e4962e43023a0b02b363ffa0b53abf6d3f4f848f5e9

# encrypt value
encrypted_value = encrypt(ptxt, spice)
print("Encryption of %s: %s" % (ptxt, encrypted_value))

# decrypt value
decrypted_value = decrypt(encrypted_value, spice)
print("Decryption of %s: %s" % (encrypted_value, decrypted_value))

Releases

No releases published

Packages

No packages published

Languages