Hawkynt

Schwaemm128-128

NIST Lightweight Cryptography finalist using SPARKLE-256 permutation. Compact variant with 128-bit security level for both confidentiality and authentication.

Properties

Property	Value
Category	Authenticated Encryption
Sub-category	Authenticated Encryption
Security status	🧪 Experimental
Complexity	Intermediate
Inventor	Christoph Dobraunig, Maria Eichlseder, Florian Mendel, Martin Schläffer
Year	2019
Origin	Not specified
Source	algorithms/aead/sparkle.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 Sparkle Specification
• Sparkle Project Website

References

• Official Sparkle Reference Implementation
• rweather/lwc-finalists C Reference (embedded-optimized)

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	000102030405060708090a0b0c0d0e0f
associatedData	(empty)
input	(empty)
expected	ddce77cdb748e6d053cab7e9190a8349

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

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	00
input	(empty)
expected	d2a4133e82b64f800b6dab2403fb094d

Vector 3 — NIST LWC KAT Count=17 (empty PT, 16-byte AD)

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	000102030405060708090a0b0c0d0e0f
input	(empty)
expected	8b7aee52d40c7e0edf9cb56ffae5d882

Vector 4 — NIST LWC KAT Count=34 (1-byte PT, empty AD)

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	(empty)
input	00
expected	fe2647aa4fb548acf44067bec0337b4d25

Vector 5 — NIST LWC KAT Count=529 (16-byte PT, empty AD)

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	(empty)
input	000102030405060708090a0b0c0d0e0f
expected	fedad36d1a592aeb931ba52ba4056865f5544dd3488406f6aadf8edaae271727

Vector 6 — NIST LWC KAT Count=1057 (32-byte PT, empty AD)

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	(empty)
input	000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
expected	fedad36d1a592aeb931ba52ba4056865 b4f5faff255ab36e0bcc7e4086a87aba d8bd1eebd6ccf00c9ea721db29727a03

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