On the Anonymity of Identity-Based Encryption

Table 1

Comparison.

System	Security	Anonymity degree	Anonymity type	Security model
Boneh and Franklin [2]	IND-ID-CPA; ANON-ID-CPA	Strong	1	Random oracle
Boyen and Waters [8]	IND-sID-CPA; ANON-sID-CPA	Strong	2	Standard
Gentry [9]	ANON-IND-ID-CPA	Strong	1	Standard
Ducas [23]	IND-sID-CPA; ANON-sID-CPA	Strong	2	Standard
Lewko [26]	IND-ID-CPA; ANON-ID-CPA	Strong	2	Standard
Chen et al. [24]	ANON-IND-ID-CPA	Strong	2	Standard