Computer Security Resource Center

Computer Security Resource Center

Computer Security
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International Mobile Subscriber Identity (IMSI)

Abbreviation(s) and Synonym(s): Definition(s):

  A unique number associated with every GSM mobile phone subscriber, which is maintained on a (U)SIM.
Source(s):
NIST SP 800-101 Rev. 1

  a unique number associated with every GSM mobile phone user.
Source(s):
NISTIR 7250 under International Mobile Subscriber Identity
NISTIR 7387 under International Mobile Subscriber Identity