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PRESENT-128

PRESENT-128 variant of the lightweight block cipher with extended 128-bit key size. Substitution-Permutation Network with 64-bit blocks, 128-bit keys, and 31 rounds. Educational implementation extending the ISO/IEC 29192-2 specification.

Properties

Property	Value
Category	Block Ciphers
Sub-category	Block Cipher
Security status	🎓 Educational Only
Complexity	Not specified
Inventor	Andrey Bogdanov, Lars R. Knudsen, Gregor Leander, Christof Paar, Axel Poschmann, Matthew J.B. Robshaw, Yannick Seurin, C. Vikkelsoe
Year	2007
Origin	🇩🇪 Germany
Source	algorithms/block/present.js

Parameters

Parameter	Supported values
Key sizes	16 bytes (128 bits)
Block sizes	8 bytes (64 bits)

Security

Status: 🎓 Educational Only

Known vulnerabilities

Issue	Description	Mitigation
Linear cryptanalysis	Susceptible to linear cryptanalytic attacks	Use for educational purposes only in constrained environments
Small block size	64-bit block size vulnerable to birthday attacks	Avoid encrypting large amounts of data with single key

Documentation

• PRESENT-128 Extension
• PRESENT Specification
• Wikipedia - PRESENT

References

• Original PRESENT Paper
• Crypto++ PRESENT Implementation
• PRESENT Analysis
• Lightweight Cryptography

Test vectors

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

Vector 1 — PRESENT-128 all zeros test vector - educational

Field	Value
key	00000000000000000000000000000000
input	0000000000000000
expected	96db702a2e6900af

Vector 2 — PRESENT-128 pattern test vector - educational

Field	Value
key	ffffffffffffffffffffffffffffffff
input	0000000000000000
expected	13238c710272a5d8

Vector 3 — PRESENT-128 all-ones plaintext, zero key

Field	Value
key	00000000000000000000000000000000
input	ffffffffffffffff
expected	3c6019e5e5edd563

Vector 4 — PRESENT-128 all-ones plaintext and key

Field	Value
key	ffffffffffffffffffffffffffffffff
input	ffffffffffffffff
expected	628d9fbd4218e5b4

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