Educational implementation inspired by Pomaranch eSTREAM Phase 3 finalist. Uses nine linear feedback shift registers with nonlinear combining function.
| Property | Value |
|---|---|
| Category | Stream Ciphers |
| Sub-category | Stream Cipher |
| Security status | 🎓 Educational Only |
| Complexity | Intermediate |
| Inventor | Carlos Cid, Gaëtan Leurent |
| Year | 2005 |
| Origin | 🇬🇧 United Kingdom |
| Source | algorithms/stream/pomaranch.js |
| Parameter | Supported values |
|---|---|
| Key sizes | 16 bytes (128 bits) to 32 bytes (256 bits) in steps of 16 bytes |
| Block sizes | 1 byte (8 bits) to 65536 bytes (524288 bits) |
Status: 🎓 Educational Only
| Issue | Description | Mitigation |
|---|---|---|
| Time-Memory-Data Tradeoff | Vulnerable to TMDT attacks and various algebraic attacks on LFSR structure | — |
| Educational Implementation | Simplified educational implementation - use only for learning | — |
4 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.
Vector 1 — Pomaranch Educational Test Vector 1 (Empty)
Source: Educational test case
| Field | Value |
|---|---|
key |
000102030405060708090a0b0c0d0e0f |
iv |
0001020304050607 |
input |
(empty) |
expected |
(empty) |
Vector 2 — Pomaranch Educational Test Vector 2 (Single Byte)
Source: Educational test case
| Field | Value |
|---|---|
key |
000102030405060708090a0b0c0d0e0f |
iv |
0001020304050607 |
input |
00 |
expected |
ad |
Vector 3 — Pomaranch Educational Test Vector 3 (Two Bytes)
Source: Educational test case
| Field | Value |
|---|---|
key |
000102030405060708090a0b0c0d0e0f |
iv |
0001020304050607 |
input |
0001 |
expected |
ad3a |
Vector 4 — Pomaranch Educational Test Vector 4 (Block)
Source: Educational test case
| Field | Value |
|---|---|
key |
000102030405060708090a0b0c0d0e0f |
iv |
0001020304050607 |
input |
000102030405060708090a0b0c0d0e0f |
expected |
ad3a0e371e5f3b91189ed272e1c8459f |