Hawkynt

Cascade(Serpent,CAST-128)

Sequential chaining of Serpent and CAST-128 block ciphers. Encrypts with Serpent first, then CAST-128. 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	48 bytes (384 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

1 vector ship with this algorithm and run in the test suite. Byte values are hexadecimal.

Vector 1 — Botan cascade.vec - Cascade(Serpent,CAST-128) vector 1

Field	Value
key	efa9cc5f3e245ab463cc60a5015cb0f6 63676760832cee6c633a518112e518d4 5dd4b627e9507cdb03a1add870e28362
input	27ede4b2a3784a33898fa330167317bf 7354072672d49dd03d13d3f0856cf3d9 c17c1237565e7320bdd23c03bde195a4 fe58623a983db9c308d5a976d92cd6a2
expected	2d7096a03bab4dbdabedb9f069fe68c3 e12ed65acce43ecf7f6d810b5eec36a5 22b605715be12003e324436652bea06b d289dbe886a5de9e51cff6c065a21f2b

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