GSM uses either A5/1 or A5/2 stream cipher for ensuring over-the-air voice privacy.

GIAC GPEN Question Answer

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?

Man-in-the-middle attack

Ciphertext only attack

Known plaintext attack

Replay attack

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Vendor: GIAC
Product: GPEN
Update on: Jul 25, 2025
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You run the following command while using Nikto Web scanner:perl nikto.

You are using the dsniff tool to intercept communications between two entities and establish credentials...

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GSM uses either A5/1 or A5/2 stream cipher for ensuring over-the-air voice privacy.

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