Common Contracts
1 similar null contracts
Anonymous ID-based Group Key Agreement Protocol without PairingJuly 19th, 2015
user receives pseudonyms Nymi of every member selected from initiator member which is encrypted by an anony- mous ID-based encryption scheme with their public keys and signed by initiator with a powerful signature scheme. After verifying the signature and decrypting the mes- sage every members knows the identity and their corre- sponding pseudonyms but an adversary cannot. All fur- ther communication between the user are done with their pseudonyms Nymi, the receiver of the message first ver- ifies the currently received pseudonym according to the pseudonym list in first decrypted message from initiator if the verification is successful he conclude that message is received from the expected member. Since the group member’s identity is protected from outside eavesdropper, the adversary not able to know the actual communicating party. In similar way before calculating the group session key each user Ui first verifies the all pseudonyms received along with their Xj (j ƒ= i) from others. If
