Hawkynt

Oribatida-256-64

Lightweight AEAD cipher based on SimP-256 permutation (reduced-round Simon-128-128). Features 128-bit keys, 128-bit nonces, and 128-bit tags with masked ciphertext generation. The ‘64’ indicates 64-bit security level.

Properties

Property	Value
Category	Authenticated Encryption
Sub-category	Lightweight Cryptography
Security status	🧪 Experimental
Complexity	Advanced
Inventor	Arghya Bhattacharjee, Eik List, Cuauhtemoc Mancillas López, Mridul Nandi
Year	2019
Origin	🌐 International
Source	algorithms/aead/oribatida.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

• Oribatida Official Website
• NIST LWC Round 2 Submission
• Oribatida Specification (NIST LWC Round 2)

References

• Oribatida Reference Software Package (ISI Kolkata)
• rweather lightweight-crypto Oribatida Source

Test vectors

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

Vector 1 — NIST LWC KAT Count=1: Empty plaintext, empty AD

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
aad	(empty)
input	(empty)
expected	21065eb73fff09a323253f97971a1167

Vector 2 — NIST LWC KAT Count=34: 1-byte plaintext, empty AD

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
aad	(empty)
input	00
expected	56f962072ac37ed49dfb53977f2092993b

Vector 3 — NIST LWC KAT Count=35: 1-byte plaintext, 1-byte AD

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
aad	00
input	00
expected	2f246a9091e193f0807f525d247b352ea2

Vector 4 — NIST LWC KAT Count=50: 1-byte plaintext, 16-byte AD (full block)

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
aad	000102030405060708090a0b0c0d0e0f
input	00
expected	c9f8e6974574513fb8e5bc6bf1716fc391

Vector 5 — NIST LWC KAT Count=172: 5-byte plaintext, 6-byte AD

Field	Value
key	000102030405060708090a0b0c0d0e0f
nonce	000102030405060708090a0b0c0d0e0f
aad	000102030405
input	0001020304
expected	10bec53b7c7089ee95475257f9caed015a8064e4b7

---

← All algorithms

This site is open source. Improve this page.