Privacy-Preserving Two-Factor Key Agreement Protocol Based on Chebyshev Polynomials

Table 1

Cryptographic methodologies and drawbacks of the existing schemes and the proposed schemes.

	Fan et al. [22]	Juang et al. [23]	Sun et al. [24]	Li et al. [25]	Guo et al. [19]	Lin [20]	Lee [21]	Proposed TAKACP protocols
Cryptographic methodologies	Symmetric encryption Rabin’s public-key cryptosystem	Symmetric encryption ECC	Symmetric encryption ECC	Public-key cryptosystem ECC	Symmetric encryption chaotic map on the interval [−1,1]	Symmetric encryption chaotic map on the interval [−1,1]	Symmetric encryption chaotic map on the interval (−∞,+∞)	Symmetric encryption, Rabin’s public-key cryptosystem chaotic map on the interval [−1,1]/( −∞,+∞)
Drawbacks	Insecure, no privacy preservation	Insecure, no privacy preservation	Traceability	Insecure, no privacy preservation	Traceability	Traceability	No free password updating	None