Optimistic Fair Exchange in Cloud-Assisted Cyber-Physical Systems

Table 2

Summary of VES schemes.

	Identity-based cryptosystem	Standard model	Strong security	High efficiency
Boneh et al. [11]	No	Yes	No	Yes
Gu [9]	Yes	No	No	Yes
Zhang et al. [10]	Yes	Yes	No	No
Lu et al. [12]	Yes	Yes	No	Yes
Nishimaki and Xagawa [13]	No	Yes	Yes	No
Shao and Gao [14]	No	No	Yes	No
Seo et al. [15]	No	Yes	Yes	No
Ours	Yes	Yes	Yes	Yes