Hawkynt

Cascade(Serpent,AES-256)

Sequential chaining of Serpent and Rijndael (AES) block ciphers. Encrypts with Serpent first, then Rijndael (AES). Provides increased security margin through cipher diversity.

Properties

Property	Value
Category	Block Ciphers
Sub-category	Block Cipher Construction
Security status	Not classified
Complexity	Advanced
Inventor	Jack Lloyd (Botan Library)
Year	2010
Origin	Not specified
Source	algorithms/block/cascade.js

Parameters

Parameter	Supported values
Key sizes	64 bytes (512 bits)
Block sizes	16 bytes (128 bits)

Security

Status: not classified — treat as unverified.

No vulnerabilities are recorded for this implementation.

Documentation

• Botan CASCADE Implementation (Header)
• Botan CASCADE Implementation (Source)
• Botan Test Vectors

References

• Cipher Cascading - Wikipedia
• Botan Cryptography Library

Test vectors

2 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.

Vector 1 — Botan cascade.vec - Cascade(Serpent,AES-256) vector 1

Field	Value
key	ee426051d1adce09ac02e2023331f273 bb1b2c4c5905deda3e1032ccd0db5611 5b011f05688f781e3f790364968e06dc 6e7bd5fa38db068cbd34a85b6b3a9458
input	06ceb2b4fd2f0a27b3c90d77d2e9bbd3 665a8dcac9187b1ee9f6a60d39042a9d 3719883b3e87845b9d4a8be258379959 775969cbf5768a359797b2fa19fc2fcc
expected	05ffbf6e8097fc746ffad8c3306e6db6 68148796180f26ca5de06ae76de16d07 8a0e72b259982423ed96ff95719deb16 0cefe7697752b0cfa984a18ddcef2ec0

Vector 2 — Botan cascade.vec - Cascade(Serpent,AES-256) vector 2

Field	Value
key	cdcd23f5518db5dae8c69b56eb352d4f 3c4a64a5ffc8e5bc2511b8310993c48e fa30a0f9e2b98a0fb1fe64173e6a8038 047aebae22e17392fe32cf1d0de3bb76
input	fbaf0de6c09d10eb31f21a7c784bf453 f82f51effa8b363ee6b33df15204f434 45170ded1e39ab922548ed82aaaded6b f470a5226b69d025fe3d532aadda069c 464d2c8a65e1a18698bd521afb305322 9c1539626392031f8c36229ff3178a7f 5c716e30dbefddd4ac2113071977b795 a8b29da7f467471a996fb63136387c28
expected	7ed1f730eed52dfb63e073a40eae404e 443aceb9a3b55132e740ace1eedf99d0 f22b3f2326e2e124594e75ed1915c8d1 55f24269254b22b6e8c53e9f64e70552 d5e3004782c6c47341ebf8716b59dab4 9b512b6df7f9d7fb914ffa56f7f89b56 1b6a5dfe9334b7561144b25fe0f57beb b4058ec7d9eea57ab62825a86312bbc3

---

← All algorithms

This site is open source. Improve this page.