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Public Key Authentication in Wireless Sensor Network (3)

Public Key Authentication in Wireless Sensor Network (3). Jeonil Kang (dreamx@seclab.inha.ac.kr). Optimal Hash Tree. Limitation of Merkle Hash Tree Incomplete Merkle trees : where the number of leaves is not 2^n. -. Direct conversion. Optimal for the maximum possible probability

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Public Key Authentication in Wireless Sensor Network (3)

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  1. Public Key Authentication in Wireless Sensor Network (3) Jeonil Kang(dreamx@seclab.inha.ac.kr)

  2. Optimal Hash Tree • Limitation of Merkle Hash Tree • Incomplete Merkle trees : where the number of leaves is not 2^n. - Direct conversion Optimal for the maximum possible probability that a node has AP length less than maximum

  3. Least Path (LP) Protocol Root Hash • Using Symmetric Structure A  B : A’s ID, A’s PK, A[1], A[2] B : h(h(h(A’s ID || A’s PK) || A[1]) || A[2]) ?= B[3] B  A : B’s ID, B’s PK, B[1], B[2] A : h(h(B[1] || h(B’s ID || A’s PK)) || B[2]) ?= A[3] A[3] B[3] B[2] A[2] A B A[1] B[1]

  4. Simulation Results Probabilistic Distribution (?)

  5. WSAN • Wireless Sensor and Actor Network a a a cluster …. a a actor node : cluster head H(ID || PK) sensor nodes a trim down …. H(ID XOR LOC || PK)

  6. Missed Sensor Nodes Aj 3) {key_group_i}key_session 2) {ACCEPT Sij}key_session Build new Merkle sub-tree Ai 1) {ID, LOCi, PK, Proofs}key_group_i Sij 4) {Trust Aj, LOCj, key_group_j}key_group_i

  7. Communication vs. Memory d : trim down levels

  8. BONUS : M-D GBS M-1 intersection nodes [1][2][3]…[M] Communication Probability (X) Is This Possible in the Real World? NO. Can We Imagine Communication Pattern? Absolutely NO. Is This Possible in the Virtual? YES.

  9. BONUS : (M-1).5-D GBS • Communication Pattern • Property in the Real World • up to 3 Dimensions [*][1][1][1] [*][1][1][2] [*][1][1][3] [*][1][1][4] [*][1][1][1] [*][1][1][2] [*][1][1][3] [*][1][1][4] [1][2][3][4] [*][1][1][1] [*][1][1][2] [*][1][1][3] [*][1][1][4] [*][1][1][1] [*][1][1][2] [*][1][1][3] [*][1][1][4] [*][1][2][1] [*][1][2][2] [*][1][2][3] [*][1][2][4] [2][1][4][3] [*][1][2][1] [*][1][2][2] [*][1][2][3] [*][1][2][4] [*][1][2][1] [*][1][2][2] [*][1][2][3] [*][1][2][4] [*][1][2][1] [*][1][2][2] [*][1][2][3] [*][1][2][4] [*][1][3][1] [*][1][3][2] [*][1][3][3] [*][1][3][4] [2][2][3][4] [*][1][3][1] [*][1][3][2] [*][1][3][3] [*][1][3][4] [*][1][3][1] [*][1][3][2] [*][1][3][3] [*][1][3][4] [2][1][4][4] [*][1][3][1] [*][1][3][2] [*][1][3][3] [*][1][3][4] [2][1][3][4] [*][1][4][1] [*][1][4][2] [*][1][4][3] [*][1][4][4] [*][1][4][1] [*][1][4][2] [*][1][4][3] [*][1][4][4] [*][1][4][1] [*][1][4][2] [*][1][4][3] [*][1][4][4] [*][1][4][1] [*][1][4][2] [*][1][4][3] [*][1][4][4]

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