Table 2 Comparison of Schemes
Yu etal’s scheme [ 3 ] | Hur et al’s scheme [ 4 ] | Liang et al’s scheme [ 5 ] | The proposed scheme | |
|---|---|---|---|---|
Suporting acces policy type | ‘AND’ | ‘AND’, ‘OR’ | Any LSSS | Any LSSS |
Attibute level user revoction | Possible | Possible | Impossible | Possible |
Grant attributes to users | The authority generates a new secret key | The authority generates a new secret key | The authority generates a new secret key | Cloud server adds attributes to user’s secret key |