Adaptive Security of Broadcast Encryption, Revisited

Table 4

Sequence of games, where a dash(−) means the same as in the previous game. Note that user set and user identity are interpreted as and , respectively.

	Challenge ciphertexts for identity	User secret keys for identity
0
1
2, , 0
2, , 1	if :
	if :
2, , 2	if :
	if :
3
4	,