What is comp128v1?

Answer 1

COMP128v1 is an authentication algorithm used in GSM (Global System for Mobile Communications) networks for verifying the identity of mobile subscribers. It generates a session key based on a user's International Mobile Subscriber Identity (IMSI) and a secret key known as Ki, stored on the SIM card. However, COMP128v1 has been found to have security vulnerabilities, making it susceptible to attacks, which led to the development of more secure versions, such as COMP128v2 and COMP128v3. As a result, its use has largely been phased out in favor of stronger algorithms.