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Table 1 Function comparison

From: Enabling efficient traceable and revocable time-based data sharing in smart city

Scheme User
traceability
User
revocability
Backward
security
Forward
security
Time-based
access control
Efficient
decryption
Scheme [12] \(\times\) \(\times\) \(\times\) \(\times\) \(\checkmark\) \(\times\)
Scheme [48] \(\checkmark\) \(\times\) \(\times\) \(\times\) \(\times\) \(\times\)
Scheme [46] \(\checkmark\) \(\checkmark\) \(\checkmark\) \(\times\) \(\times\) \(\times\)
Scheme [6] \(\times\) \(\checkmark\) \(\checkmark\) \(\checkmark\) \(\times\) \(\times\)
Scheme [21] \(\times\) \(\checkmark\) \(\checkmark\) \(\times\) \(\checkmark\) \(\checkmark\)
Our scheme \(\checkmark\) \(\checkmark\) \(\checkmark\) \(\checkmark\) \(\checkmark\) \(\checkmark\)