TinySec: A Link Layer Security Architecture for Wireless Sensor ...

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Initialization Vector • Plaintext prefix to the encrypted message • Used to add variation to otherwise identical messages – Without, identical messages would encrypt identically, violating semantic security.
Replay Protection • Prevent a legitimate message from being resent later. • Can be achieved by a monotonically increasing message counter. • Not addressed by <strong>TinySec</strong>; authors believe higher layer protocols should handle this.
Page 1 and 2: TinySec: A Link Layer Security Arch
Page 3 and 4: Motivation • Need a secure commun
Page 5 and 6: Access Control/Message Integrity
Page 7: Confidentiality • Keep message co
Page 11 and 12: Two-teir design • Based on the Ti
Page 13 and 14: MAC • Protects the entire packet
Page 15 and 16: MAC • Remove the CRC and group fi
Page 17 and 18: Initialization Vector • 8 byte IV
Page 19 and 20: Cipher • What kind of cipher shou
Page 21 and 22: Keying • Simple mechanism: use a
Page 23 and 24: Performance • Small throughput dr
Page 25 and 26: Results • Mostly effective authen

TinySec: A Link Layer Security Architecture for Wireless Sensor ...

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