Multiple choice general knowledge science & technology

Encryption algorithms for GSM networks

  1. A6/1/5/3/8X

  2. A5/1/2/3/7X

  3. A5/1/2/3/8X

  4. A5/1/5/3/8X
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

GSM networks use A5 series encryption algorithms to secure voice and data transmissions over the air interface. A5/1 is the most common (used in Europe and US), A5/2 is weaker (export version), A5/3 (KASUMI) is stronger for 3G, and A5/8 provides enhanced security for modern implementations.

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