638026
Description
Mind Map by Craig Parker, updated more than 1 year ago
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Created by Craig Parker
about 10 years ago
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u10.12 UMTS Integrity Protection
- To protect some radio interface signals
- Protects against unauthorised modification,
insertion or replay of messages
- Applies to security mode establishment
and other critical signalling procedures
- prevents base station from deselecting encryption
- prevents base station from deselecting encryption
- Applies to security mode establishment
and other critical signalling procedures
- Protects against unauthorised modification,
insertion or replay of messages
- Helps extend the influence of
authentication when encryption is
not applied
- Uses 128 bit integrity key IK
derived during authentication
- Algorithms
- UIA1
- Based on KASUMI
- Based on KASUMI
- UIA2
- In case of a vulnerability on
UIA1 - based on Smow 3g
Block Cipher
- In case of a vulnerability on
UIA1 - based on Smow 3g
Block Cipher
- Located in phone and radio nw controllers
- IK passed from USIM to ME after auth
- Standardised for global inter operability
- Designed and evaluated openly
- No export restrictions
- Open publication
- UIA1
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