An efficient certificateless two-party authenticated key agreement protocol

Further improvement of a certificateless signature scheme without pairing

“…Therefore, it could solve both of the management problem and the key escrow problem. To satisfy different applications, many certificateless encryption schemes [3][4][5], certificateless key agreement schemes [6][7][8] and certificateless signcryption schemes [9,10] have been proposed.…”

Avoiding Key Off-Set attack in a Pairing-Free Certificateless Key Agreement Protocol based on ECC

“…All the key agreement protocols [2,3,4,19] without key confirmation are vulnerable to this attack. From the attack, the adversary does not gain any knowledge about the agreed session key, but two entities generate a wrong session key.…”

“…The proposed identity based key agreement protocol is compared with the protocols by Debiao He [4] (2011) , Debiao He [3] (2012) and Haiyan Sun [2] (2013) from the computational cost , number of exchanged messages and the key offset attack where T EC-mult is the time required for executing multiplication operation on elliptic curve E, T EC-add is the time required for executing addition operation on elliptic curve E and T h is the time required for executing one way dispersed row function operation. Table 1 specify this comparative study in details.…”

“…The security analysis of the second protocol is discussed. The proposed certificateless key agreement protocol is compared with other protocols in literature [2,3,4] and it requires minimal computational cost. Moreover, this protocol is implemented using the Mathematica (7) program.…”

“…He et al [18] (2011) also proposed a certificateless key agreement protocol without pairing. In (2011 and 2012), Debiao [4,3] proposed two certificateless key agreement protocols without pairings. In 2013, HaiyanSun [2] proposed another two-party key agreement protocol without pairings.…”