作者:
C Gentry，A Silverberg
关键词:
identity-based cryptography / hierarchical identity-based cryptography / elliptic curves / pairing-based cryptography
摘要:
We present hierarchical identity-based encryption schemes and signature schemes that have total collusion resistance on an arbitrary number of levels and that have chosen ciphertext security in the random oracle model assuming the difficulty of the Bilinear Diffie-Hellman problem.
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