Hawkynt

SpoC-128

Lightweight AEAD using sLiSCP-light-256 permutation with 128-bit tag. Sponge-based construction optimized for resource-constrained devices.

Properties

Property	Value
Category	Authenticated Encryption
Sub-category	AEAD Cipher
Security status	🧪 Experimental
Complexity	Advanced
Inventor	Kalikinkar Mandal, Dhiman Saha
Year	2019
Origin	🌐 International
Source	algorithms/aead/spoc.js

Parameters

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

• SpoC Specification
• NIST LWC Round 2 Package

References

• rweather/lightweight-crypto C Reference Implementation

Test vectors

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

Vector 1 — NIST LWC KAT Vector #1 - Empty plaintext and AD

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	(empty)
input	(empty)
expected	5a32211f98add5ba77539a4660512dcb

Vector 2 — NIST LWC KAT Vector #2 - Empty plaintext with single AD byte

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	00
input	(empty)
expected	1590ababdcaddcbf42f12f6e211407a0

Vector 3 — NIST LWC KAT Vector #34 - Single plaintext byte, empty AD

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	(empty)
input	00
expected	595154be7e7a3515ec09e9a1be55b02783

Vector 4 — NIST LWC KAT Vector #35 - Single plaintext byte with single AD byte

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	00
input	00
expected	ae7ceed1d556f2f0607f90c89c1208a6c9

Vector 5 — NIST LWC KAT Vector #169 - 5-byte plaintext with 3-byte AD (partial rate block)

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	000102
input	0001020304
expected	65f7ace7f270b64a8608774bedfa7fcd6e17c04077

Vector 6 — NIST LWC KAT Vector #1089 - 32-byte plaintext with 32-byte AD (multiple full rate blocks)

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
associatedData	000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
input	000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
expected	49a0541c4e10fb19bb20ec55115ff193 f8c1255dddd173cf79bab9135718aa59 c68bd981024c84e5135f17c10c3e7f56

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