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A new generalized group-oriented cryptoscheme without trusted centers

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2 Author(s)
Chin-Chen Chang ; Inst. of Comput. Sci. & Inf. Eng., Nat. Chung Cheng Univ., Chiayi, Taiwan ; Horng-Chin Lee

The authors first define the concept of a generalized group-oriented cryptosystem. Based on the generalized secret-sharing scheme proposed by H.Y. Lin and L. Harn (1991), they present a noninteractive approach for realizing such a group-oriented cryptosystem. There are three advantages to the approach: it does not need any trusted clerk or center to distribute the messages to the recipients in the receiving group; it allows the sender to renew the encryption/decryption keys for broadcasting secure messages in each transmission; and it allows the sender to determine the legal recipients without any coordination with the receiving groups

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Selected Areas in Communications, IEEE Journal on  (Volume:11 ,  Issue: 5 )