Hawkynt

KNOT-AEAD-128-256

NIST Lightweight Cryptography finalist using 256-bit sponge construction with bit-sliced KNOT permutation. Features hardware-efficient S-box design and simple linear diffusion for resource-constrained environments.

Properties

Property	Value
Category	Authenticated Encryption
Sub-category	Authenticated Encryption
Security status	🧪 Experimental
Complexity	Advanced
Inventor	Designers from Nanyang Technological University
Year	2019
Origin	Not specified
Source	algorithms/aead/knot-aead.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 Project
• KNOT Specification
• Reference Implementation

References

• KNOT NIST LWC Round 2 Submission Package (Reference C Code)
• NIST LWC Round 2 Candidates

Test vectors

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

Vector 1 — NIST LWC KAT Vector #1: Empty PT/AD

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	(empty)
input	(empty)
expected	460779ba8e7ae47c69230e79d8684881

Vector 2 — NIST LWC KAT Vector #2: Empty PT with 1-byte AD

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	00
input	(empty)
expected	f140dd9677e88d6594b7eb3b02fa2981

Vector 3 — NIST LWC KAT Vector #5: Empty PT with 4-byte AD

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	00010203
input	(empty)
expected	527311869ad8fa60712c1d455a6f377c

Vector 4 — NIST LWC KAT Vector #9: Empty PT with 8-byte AD (rate boundary)

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	0001020304050607
input	(empty)
expected	373a4fd111779ea4eaccb63378f22948

Vector 5 — NIST LWC KAT Vector #17: Empty PT with 16-byte AD

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	000102030405060708090a0b0c0d0e0f
input	(empty)
expected	19f3524ed58284638acdf3da761dd3d5

Vector 6 — NIST LWC KAT Vector #34: 1-byte PT with empty AD

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	(empty)
input	00
expected	e93b487dde39fdffe7fb011c639b307a5d

Vector 7 — NIST LWC KAT Vector #340: 10-byte PT with 9-byte AD

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	000102030405060708
input	00010203040506070809
expected	34f50c813fb6679e88679b8581958da336ea1087c243541aa8da

Vector 8 — NIST LWC KAT Vector #347: 10-byte PT with 16-byte AD

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	000102030405060708090a0b0c0d0e0f
input	00010203040506070809
expected	b37a7263e721ace03dac24447f66bed7c87d5c964f19e2f3f5e7

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