Cryptographic system, method of generating a secret key of the user for use in a cryptographic system based on attribute hierarchical method of decryption of a ciphertext for use in a cryptographic system based on attribute hierarchical method of Cr Iptografia a message for use in a cryptographic system based on hierarchical attribute, and.The computer program

摘要

Abstract cryptographic system, method of generating a secret key of the user for use in a cryptographic system based on attribute hierarchical method of decryption of a ciphertext for use in a cryptographic system based on hierarchical attribute, mu00e9tod The encryption of a message for use in a cryptographic system based on hierarchical attribute, and.The computer program an authority of area 13 for use in a hierarchy of domain authority in a cryptographic system hierarchy.The authority of the area 13 comprises a generator of secret key of the user 21 to generate a secret key of the user based on a secret key of the field and one or more representations of the attribute, in order to obtain a secret key of the user associated with a set of attributes and The teeth to the representations of the attribute.And the secret key of the field is based on a secret key of the field of an authority of area of origin or a secret key root of an authority root of the hierarchy of domain authority and the representations of the attribute are independent of the hierarchy. A descriptografador makes use of the secret key of the user.A criptografador generates the ciphertext that can be decrypted by the descriptografador. 1 / 1