Private Key Set, S Sample Clauses

Private Key Set, S. The TA computes the private keys for each node using all the permutations of their η public keys with its N master keys to obtain the node’s “private key set” S = {K11, · · · , KηN }, where Kij, called the private key, is a (1 × m) row vector, computed as follows, Kij = VT Mj (mod p) (2) for i = 1, · · · , η and j = 1, · · · , N The private key Kij is computed from the i − th public key Vi and the j − th master key Mj. We call the relationship of a private key with the public key and master key used to compute it the “private-public-master-key association” (PPMka). The TA transfers the private key set to the node using a secure connection and stores them in random order. Alternatively, the private key set can be first shuffled before transferring to the node. If a node is compromised and the private keys obtained, the adversary cannot tell from the storage location which public key and master key was used to compute it.