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

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TinySec Design • Unsuitability of existing schemes requires a new design – High level protocols like SSL or IPSEC are too heavyweight. – Existing wireless security designs are still too limiting • Insecure (WEP) • Incomplete (SNEP)
Two-teir design • Based on the TinyOS Packet • TinySec-Auth replaces the CRC and group field with a MAC • TinySec-AE adds encryption to TinySec-Auth
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: Replay Protection • Prevent a leg
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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