Hawkynt

Schwaemm256-256

NIST Lightweight Cryptography finalist using SPARKLE-512 permutation. Maximum security variant with 256-bit security level for key, nonce, and tag.

Property	Value
Category	Authenticated Encryption
Sub-category	Authenticated Encryption
Security status	🧪 Experimental
Complexity	Advanced
Inventor	Christoph Dobraunig, Maria Eichlseder, Florian Mendel, Martin Schläffer
Year	2019
Origin	Not specified
Source	`algorithms/aead/sparkle.js`

Parameter	Supported values
Key sizes	32 bytes (256 bits)
Tag sizes	32 bytes (256 bits)

Flag	Value
`SupportsDetached`	No

Status: 🧪 Experimental

No vulnerabilities are recorded for this implementation.

4 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)

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

Field	Value
`key`	`000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f`
`nonce`	`000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f`
`associatedData`	`00`
`input`	(empty)
`expected`	`6af0f211bc7ff4186eea03d37025f294036be6e90970713e5b5a630fff07dcbe`

Vector 3 — NIST LWC KAT Count=34 (1-byte PT, empty AD)

Field	Value
`key`	`000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f`
`nonce`	`000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f`
`associatedData`	(empty)
`input`	`00`
`expected`	`bbe3ced9ab9967846e9f39911beba2ff c4585c560043e4381e5fdaf8789265d7 91`

Vector 4 — NIST LWC KAT Count=1057 (32-byte PT, empty AD)

Field	Value
`key`	`000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f`
`nonce`	`000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f`
`associatedData`	(empty)
`input`	`000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f`
`expected`	`bb5918195dc5d4d944594a7b63d64601 40be022efb65d13c16fb50a48f224b69 7e6b81dca1366d43ee20b152ad39cefc b6103d3ec26a1dc5277b117ada1ed1bb`

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