Thomas Kunz
Systems and Computer Engineering
59
Security
Data
E3
E2
link key (128 bit)
encryption key (128 bit)
payload key
Keystream generator
Data
Cipher data
Authentication key generation
(possibly permanent storage)
Encryption key generation
(temporary storage)
PIN (1-16 byte)
User input (initialization)
Pairing
Authentication
Encryption
Ciphering
E3
E2
link key (128 bit)
encryption key (128 bit)
payload key
Keystream generator
PIN (1-16 byte)