CPC H04W 12/043 (2021.01) [H04W 12/06 (2013.01); H04W 12/108 (2021.01); H04W 12/122 (2021.01)] | 20 Claims |
1. A method performed by a user equipment (UE) in a communication system, the method comprising:
receiving, from a base station, an access stratum (AS) security mode command message including a first hash value of a master information block (MIB) or a system information block (SIB);
comparing the first hash value of the MIB or the SIB received in the AS security mode command message with a second hash value of the MIB or the SIB to validate the MIB or the SIB that the UE has read; and
identifying whether a hash mismatch for the MIB or the SIB is detected based on the comparison of the first hash value and the second hash value,
wherein the first hash value is determined by including a physical cell identifier (PCI) of a cell in a calculation of the first hash value of the MIB or the SIB, and
wherein the second hash value is determined by the UE.
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