TETRA Security
TETRA Security
TETRA Security
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Air Interface Encryption<br />
‣ Air Interface Encryption protects against eavesdropping<br />
‣ Protection is applied to: Encrypted<br />
– Signalling<br />
Key<br />
Management<br />
– Identities<br />
Network<br />
– Speech<br />
– Data<br />
Clear<br />
‣ Several Classes of encryption<br />
– Class 1 – Clear<br />
– Class 2 – Static Cipher Key Encryption<br />
– Class 3 – ‘Dynamic’ key encryption<br />
– Class 3g – ‘Dynamic’ keys including group cipher keys<br />
‣ Protection applies to the radio link only, not inside the network<br />
Encrypted<br />
Slide 11
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