Term
| Which protocol(s) use E1? |
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Definition
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Term
| What protocol(s) use E22? |
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Definition
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Term
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Definition
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Term
| What protocol(s) uses E21? |
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Definition
Generation of unit key
Generation of link key |
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Term
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Definition
| Generation of encryption key |
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Term
| What are the 7 protocols? |
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Definition
Unit key
Initialization key
Link key
Key stream generation
Encryption key
Mutual auth
Encrypt data |
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Term
| What is required for generation of Unit key? |
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Definition
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Term
| When generating the initialization key, where does IN_RAND come from? |
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Definition
| One of the devices makes it and then shares it with the other device |
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Term
| What goes in to generat the initialization key? |
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Definition
| IN_RAND, PIN and L(ength of PIN) |
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Term
| How is a semi-permanent link key generated? |
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Definition
| Using the init key and one of the device's unit keys. |
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Term
| How is a combination link key generated? |
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Definition
| A LK_RAND value for each device and the device ADDR generates one half of link key. The other half is the same values of the other device. |
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Term
| What two types of link key are there? |
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Definition
Semi-permanent
Combination key |
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Term
| How is mutual authentication done? |
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Definition
ADDR(B) is sent to the device and AU_RAND is generated by Dev(A).
On both sides, the ADDR(B), Link key, AU_RAND go in |
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Term
| What two values do Mutual authentication produce? |
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Definition
SRES
ACO (Authenticated ciphering offset) |
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Term
| How is generation of encryption key done? |
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Definition
EN_RAND is shared from dev(A) to B.
EN_RAND, K(link) and ACO produce the K(c) |
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Term
| Key stream is generated how? |
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Definition
EN_RAND (which is already there from the encryption key generation)
ADDR(A), CLOCK(Master), and K(C) Go in |
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