A5/2

A5/2 is a stream cipher used to provide voice privacy in the GSM cellular telephone protocol.

The cipher is based around a combination of four linear feedback shift registers with irregular clocking and a non-linear combiner.

v • d • e Stream ciphers

Widely used ciphers: RC4 \| Block ciphers in stream mode eSTREAM Portfolio: Software: HC-128 \| Rabbit \| Salsa20/12 \| SOSEMANUK Hardware: Grain \| MICKEY-128 \| Trivium

Other ciphers: A5/1 \| A5/2 \| E0 \| FISH \| ISAAC \| MUGI \| Panama \| Phelix \| Pike \| Py \| QUAD \| Scream \| SEAL \| SOBER \| SOBER-128 \| VEST \| WAKE

Theory: Shift register \| LFSR \| NLFSR \| Shrinking generator \| T-function \| IV

Attacks: Correlation attack \| Correlation immunity

v • d • e Cryptography

History of cryptography · Cryptanalysis · Cryptography portal · Topics in cryptography

Symmetric-key algorithm · Block cipher · Stream cipher · Public-key cryptography · Cryptographic hash function · Message authentication code · Random numbers · Steganography

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See also