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Primitive Operations

Primitive Operations. Two Types of Operations. Communication Operations Reader to tag Read Write Tag to Tag Read Write Hash and Encryption Operations Hash: MD5, Sha-1, Sha-256, Sha-512 Encryption: Symmetric: AES, DES Asymmetric: RSA. Reader. RFID tag. Challenge C.

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Primitive Operations

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  1. Primitive Operations

  2. Two Types of Operations • Communication Operations • Reader to tag • Read • Write • Tag to Tag • Read • Write • Hash and Encryption Operations • Hash: • MD5, Sha-1, Sha-256, Sha-512 • Encryption: • Symmetric: AES, DES • Asymmetric: RSA

  3. Reader RFID tag Challenge C Response F(C, key) Tag to tag: Write Tag to tag: Read Hash or encryption: F(*) An Example • An example of RFID security protocol • A challenge-response protocol • Pass 1: the reader sends a challenge C • Pass 2: the tag returns a response F(C, key) Reader to tag: Write Reader to tag: Read

  4. A memory bank RFID tag C Key ……… A hash or encryption Tag to Tag Operations • An example of RFID security protocol • A challenge-response protocol F(C, Key) Tag to tag: Read Tag to tag: Write F(x, y)

  5. Time Requirements • Tag to Tag Operations • Read: 0.007 ms, Write: 16.73 ms, one word • Reader to Tag Operations • Read: 47 ms one word, 57 ms 15 words, 0.5 ms +1 word

  6. Time Requirements • Tag to Tag Operations • Read: 0.007 ms, Write: 16.73 ms, one word • Reader to Tag Operations • Read: 47 ms one word, 57 ms 15 words, 0.5 ms +1 word • Write: 63 ms one word, increment: 20 ms / word

  7. Time Requirements • Hash and Encryption Operations • Hash: MD5, Sha-1, Sha-256, Sha-512 Block size (bytes): one block n blocks MD5: 55 55 + 64n Sha-1: 55 55 + 64n Sha-256: 55 55 + 64n Sha-512: 111 111+128n

  8. Time Requirements • Hash and Encryption Operations • Hash: MD5, Sha-1, Sha-256, Sha-512 • MD5: 1.8 ms one block, 3.2 ms two blocks

  9. Time Requirements • Hash and Encryption Operations • Hash: MD5, Sha-1, Sha-256, Sha-512 • Sha-1: 5.0ms / block

  10. Time Requirements • Hash and Encryption Operations • Hash: MD5, Sha-1, Sha-256, Sha-512 • Sha-256: 11.6ms / block

  11. Time Requirements • Hash and Encryption Operations • Hash: MD5, Sha-1, Sha-256, Sha-512 • Sha-512: 41.0ms / block

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