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This paper presents the first mediated hierarchical identity-based encryption and signature schemes. Both schemes are designed to support information access control in hierarchical...
Binary tree encryption (BTE), a relaxation of hierarchical identity-based encryption (HIBE), has recently emerged as a useful and intriguing primitive. On the one hand, the defini...
A number of previous papers explored the notion of identity-based group signature. We present a generic construction of identity-based group signatures. Our construction is based o...