Hawkynt

PRESENT-80

PRESENT-80 lightweight block cipher designed for constrained environments. Substitution-Permutation Network with 64-bit blocks, 80-bit keys, and 31 rounds. Educational implementation following 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	10 bytes (80 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

• ISO/IEC 29192-2:2019 - PRESENT
• 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-80 all zeros test vector - educational

Field	Value
key	00000000000000000000
input	0000000000000000
expected	5579c1387b228445

Vector 2 — PRESENT-80 pattern test vector - educational

Field	Value
key	ffffffffffffffffffff
input	0000000000000000
expected	e72c46c0f5945049

Vector 3 — PRESENT-80 all-ones plaintext, zero key

Field	Value
key	00000000000000000000
input	ffffffffffffffff
expected	a112ffc72f68417b

Vector 4 — PRESENT-80 all-ones plaintext and key

Field	Value
key	ffffffffffffffffffff
input	ffffffffffffffff
expected	3333dcd3213210d2

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