FIELD: information technology.
SUBSTANCE: wireless transmit receive unit (WTRU) is configured so that it could receive unencrypted and encrypted messages. Unencrypted messages include identity requests, authentication requests, Non-Access Stratum (NAS) protection mode commands and answers to requests for tracked area updating. Encrypted messages can come from NAS and Radio Resource Controller (RRC). The mentioned messages are encrypted using key protection.
EFFECT: providing necessary information protection.
16 cl, 7 dwg
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