3GPP standardized stream cipher for UMTS/3G networks. Used in UEA2 confidentiality and UIA2 integrity algorithms. Features LFSR-based design with FSM and operates on 128-bit keys and IVs.
| Property | Value |
|---|---|
| Category | Stream Ciphers |
| Sub-category | 3GPP Stream Cipher |
| Security status | 🛡️ Secure |
| Complexity | Expert |
| Inventor | P. Ekdahl, T. Johansson |
| Year | 2003 |
| Origin | 🇸🇪 Sweden |
| Source | algorithms/stream/snow3g.js |
| Parameter | Supported values |
|---|---|
| Key sizes | 16 bytes (128 bits) |
| Nonce sizes | 16 bytes (128 bits) |
Status: 🛡️ Secure
| Issue | Description | Mitigation |
|---|---|---|
| Theoretical Attacks | Some theoretical cryptanalytic attacks exist but require impractical amounts of data | Attacks not practical for real-world 3G usage scenarios |
1 vector ship with this algorithm and run in the test suite. Byte values are hexadecimal.
Vector 1 — 3GPP TS 35.216 Test Vector 1
| Field | Value |
|---|---|
key |
00000000000000000000000000000000 |
iv |
00000000000000000000000000000000 |
input |
0000000000000000 |
expected |
13b2655e88d404bb |