Hawkynt

HYENA

NIST Lightweight Cryptography candidate combining GIFT-128 nibble-based cipher with efficient AEAD construction. Uses sponge-like mode with delta values for authenticated encryption.

Properties

Property	Value
Category	Authenticated Encryption
Sub-category	Authenticated Encryption
Security status	🧪 Experimental
Complexity	Advanced
Inventor	Subhadeep Banik, Khashayar Barooti, Fatih Balli, Andrea Caforio, F. Betül Durak, Serge Vaudenay
Year	2020
Origin	🌐 International
Source	algorithms/aead/hyena.js

Parameters

Parameter	Supported values
Key sizes	16 bytes (128 bits)
Tag sizes	16 bytes (128 bits)

Capabilities

Flag	Value
SupportsDetached	No

Security

Status: 🧪 Experimental

No vulnerabilities are recorded for this implementation.

Documentation

• NIST LWC Submission
• HYENA Specification
• Reference Implementation
• GIFT Cipher

References

• HYENA Reference Software Package (ISI Kolkata)
• rweather lightweight-crypto HYENA Source

Test vectors

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

Vector 1 — NIST LWC KAT Count 1 (empty PT, empty AD)

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b
associatedData	(empty)
input	(empty)
expected	f83ca141a233342b1507192f171774a6

Vector 2 — NIST LWC KAT Count 2 (empty PT, 1-byte AD)

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b
associatedData	00
input	(empty)
expected	e350763873b36471681989e03cdfb4be

Vector 3 — NIST LWC KAT Count 3 (empty PT, 2-byte AD)

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b
associatedData	0001
input	(empty)
expected	9a9914d7a8cdfedb8a688be6db7d214f

Vector 4 — NIST LWC KAT Count 17 (empty PT, 16-byte AD)

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b
associatedData	000102030405060708090a0b0c0d0e0f
input	(empty)
expected	50a5c6abba4ce9171452107468ade5ae

Vector 5 — NIST LWC KAT Count 34 (1-byte PT, empty AD)

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b
associatedData	(empty)
input	00
expected	3562c0cac7e1f43e1b2fa4d8addbf15c3f

Vector 6 — NIST LWC KAT Count 35 (1-byte PT, 1-byte AD)

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b
associatedData	00
input	00
expected	a79e7781a6274290d22a1a52590920ee64

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