| 摘要 |
A device for recovering an encryption key by processing an encrypted digital communication comprising:
a receiver configured to receive a first ciphertext encrypted according to an A5/1, network to mobile or mobile to network, or an A5/2, network to mobile or mobile to network, encryption scheme wherein the first ciphertext is an encryption of a first message upon which a GSM error correction coding scheme was employed prior to encryption;
and a processing circuitry adapted to recover an encryption key used in the encryption of the first ciphertext by performing a ciphertext-only cryptanalysis of the first ciphertext. |
