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

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Cryptography Overview • Why use crypto • Provide probabilistic guarantees about messages sent/received on the network. – Access control/message integrity – Confidentiality – Replay Protection
Access Control/Message Integrity • Ensure only authorized senders are allowed to send messages. • Ensure messages are unmodified after transmission. • Can achieve both with a Message Authentication Code (MAC).
Page 1 and 2: TinySec: A Link Layer Security Arch
Page 3: Motivation • Need a secure commun
Page 7 and 8: Confidentiality • Keep message co
Page 9 and 10: Replay Protection • Prevent a leg
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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