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

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MAC

• Protects the entire packet (except the

MAC itself).

• Uses CBC-MAC with packet length

XORed with the first block.

• Store 4 bytes of the result.

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Packet Format

MAC • Protects the entire packet (except the MAC itself). • Uses CBC-MAC with packet length XORed with the first block. • Store 4 bytes of the result.

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 and 8: Confidentiality • Keep message co
Page 9 and 10: Replay Protection • Prevent a leg
Page 11: Two-teir design • Based on the Ti
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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