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KASUMI

3GPP block cipher for 3G mobile telecommunications security. Based on MISTY1 with 64-bit blocks and 128-bit keys. Uses 8-round Feistel structure with FO and FL functions. Employed in A5/3, f8, and f9 algorithms.

Properties

Property	Value
Category	Block Ciphers
Sub-category	Block Cipher
Security status	🎓 Educational Only
Complexity	Intermediate
Inventor	3GPP (3rd Generation Partnership Project)
Year	1999
Origin	🌐 International
Source	algorithms/block/kasumi.js

Parameters

Parameter	Supported values
Key sizes	16 bytes (128 bits)
Block sizes	8 bytes (64 bits)

Security

Status: 🎓 Educational Only

No vulnerabilities are recorded for this implementation.

Documentation

• 3GPP TS 35.202 - KASUMI Specification
• Wikipedia: KASUMI
• LibTomCrypt Implementation

References

• ETSI TS 135 202 - KASUMI Specification (C reference code in annex)
• ETSI TS 135 201 - f8/f9 Specification (C reference code in annex)

Test vectors

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

Vector 1 — DarkCrypt KASUMI-128 vector 1/zero

Field	Value
key	00000000000000000000000000000000
input	0000000000000000
expected	f54cfbf75f3b5699

Vector 2 — DarkCrypt KASUMI-128 vector 2/incr

Field	Value
key	000102030405060708090a0b0c0d0e0f
input	0001020304050607
expected	bb6b2e0c88ad7c37

Vector 3 — DarkCrypt KASUMI-128 vector 3/incr2

Field	Value
key	0102030405060708090a0b0c0d0e0f10
input	1011121314151617
expected	455a65f01cfe4adc

Vector 4 — LibTomCrypt Vector #1: Single bit key (bit 0)

Field	Value
key	80000000000000000000000000000000
input	0000000000000000
expected	4b58a771afc7e5e8

Vector 5 — LibTomCrypt Vector #2: Single bit key (bit 8)

Field	Value
key	00800000000000000000000000000000
input	0000000000000000
expected	7eef113c95bb5a77

Vector 6 — LibTomCrypt Vector #3: Single bit key (bit 16)

Field	Value
key	00008000000000000000000000000000
input	0000000000000000
expected	5f140686d7ad5a39

Vector 7 — LibTomCrypt Vector #4: Single bit key (bit 120)

Field	Value
key	00000000000000000000000000000001
input	0000000000000000
expected	2e1491cf70aa465d

Vector 8 — LibTomCrypt Vector #5: Single bit key (bit 112)

Field	Value
key	00000000000000000000000000000100
input	0000000000000000
expected	b54586f4ab9ae546

Vector 9 — Botan kasumi.vec vector 1

Field	Value
key	2bd6459f82c5b300952c49104881ff48
input	ea024714ad5c4d84
expected	df1f9b251c0bf45f

Vector 10 — Botan kasumi.vec vector 2

Field	Value
key	8ce33e2cc3c0b5fc1f3de8a6dc66b1f3
input	d3c5d592327fb11c
expected	de551988ceb2f9b7

Vector 11 — Botan kasumi.vec vector 3

Field	Value
key	4035c6680af8c6d1a8ff8667b1714013
input	62a540981ba6f9b7
expected	4592b0e78690f71b

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