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DryGASCON256-HASH

Extended lightweight hash function using DrySPONGE construction with GASCON permutation. Provides 512-bit hash output with enhanced security margin and side-channel resistance.

Properties

Property	Value
Category	Hash Functions
Sub-category	Lightweight Hash
Security status	🧪 Experimental
Complexity	Advanced
Inventor	Sébastien Riou, Michaël Raulet, Stéphane Castelain
Year	2020
Origin	Not specified
Source	algorithms/hash/drygascon-hash.js

Parameters

Parameter	Supported values
Output sizes	64 bytes (512 bits)

Security

Status: 🧪 Experimental

No vulnerabilities are recorded for this implementation.

Documentation

• DryGASCON GitHub Repository
• NIST LWC Project Page
• DryGASCON Specification

References

• Official DryGASCON reference implementation (Sébastien Riou)

Test vectors

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

Vector 1 — DryGASCON256-HASH: Empty message (Count=1)

Field	Value
input	(empty)
expected	6896590a319fde1f3b18ebae1df1e5e8 fb0756a878ee9e2165b085ff3aed6805 f8f73d5714c75960a6a8095dae5ef9c0 0d3f055490d4cf45d4a26b37fd7b5441

Vector 2 — DryGASCON256-HASH: Single byte 0x00 (Count=2)

Field	Value
input	00
expected	dab16b97c37160586b647b0dca689794 365480324e539cd63f87b119b0c46668 dcde5163a170e06da9361b05f7ce7645 ef68bdc99b3b813b8b1583c5c62d4e4a

Vector 3 — DryGASCON256-HASH: Two bytes (Count=3)

Field	Value
input	0001
expected	d1982bc43d8c42dcd94c1c7e96119513 74dc8bf5e6fc407e8a8dc423f4f0f459 09a4aeaa1000b35a8081862e79750880 7e8763f611aef1d3c06ecaedb5229980

Vector 4 — DryGASCON256-HASH: Four bytes (Count=5)

Field	Value
input	00010203
expected	3c4c288299fd3986fb213b945addb70f 26edea09fa4291cf42467355da09fdd7 e69a7b306636dac078ee81643a19f512 6ea71dbc4032be2320b8382119238d5b

Vector 5 — DryGASCON256-HASH: Eight bytes (Count=9)

Field	Value
input	0001020304050607
expected	ac99fd9156d4c6fc613a85cbbfd283fc 7214792b3e786e34b33d368020f79bf6 ffc2c29fa86eaf1286506f30adb3481b 3830e115ae72f155c3045dd8a27894d1

Vector 6 — DryGASCON256-HASH: 16 bytes (Count=17)

Field	Value
input	000102030405060708090a0b0c0d0e0f
expected	e743de651072ae1a078d201373bc383f fae607545308d268ac663b0b680fee8b d0d053ea40a55c5dd2aee281c1cbffa7 9152acc9bd5705f3fb4daf415458ca12

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