GIAC
GPEN · Question #162
GSM uses either A5/1 or A5/2 stream cipher for ensuring over-the-air voice privacy. Which of the following cryptographic attacks can be used to break both ciphers?
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Penetration Testing Foundations & Reconnaissance
Question
GSM uses either A5/1 or A5/2 stream cipher for ensuring over-the-air voice privacy. Which of the following cryptographic attacks can be used to break both ciphers?
Options
- AMan-in-the-middle attack
- BCiphertext only attack
- CKnown plaintext attack
- DReplay attack
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Topics
#GSM encryption#stream cipher#ciphertext-only attack#cryptanalysis