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    • 2. 发明授权
    • RSA computation method for efficient batch processing
    • RSA计算方法,用于高效批处理
    • US4964164A
    • 1990-10-16
    • US389915
    • 1989-08-07
    • Amos Fiat
    • Amos Fiat
    • H04L9/30
    • H04L9/302H04L9/3249
    • A computation for batch processing public key encryption method using a processor. The method batch processes an e1.sup.th root of a first message-data signal, M1, as M1.sup.1/e1, and an e2.sup.th root of a second message-data signal, M2,. where e1 and e2 are relatively prime, using the steps of computing an exponent product, e, by multiplying e1 times e2; computing a message product, M, wherein M=M1 .sup.(e/e1) M2.sup.(e/e2) ; computing a batch root, R, wherein R=M.sup.1/e ; computing the euclidean inverse, t, of e2 modulo e1; and computing R.sup.e2*t /(M1.sup.(e2*t-1)/e1 M2.sup.t), thereby generating M1 .sup.(1/e1). For a plurality of message-data signals, the method batch processes a plurality of message-data-signal roots as the e1, e2, . . ., ek, roots for a plurality of message-data signals, M1, M2, . . . Mk, respectively, where the ei and ej are pairwise relatively prime for i.noteq.j.
    • 使用处理器的批量处理公钥加密方法的计算。 方法批处理第一消息数据信号M1的第一根,M1,作为M11 / e1,以及第二消息数据信号M2的第e根。 其中e1和e2是相对素数,使用计算指数乘积的步骤e,通过乘以e1乘以e2; 计算消息乘积M,其中M = M1(e / e1)M2(e / e2); 计算批次R,其中R = M1 / e; 计算e2模e1的欧几里得逆,t; 并计算Re2 * t /(M1(e2 * t-1)/ e1 M2t),从而生成M1(1 / e1)。 对于多个消息数据信号,方法批处理多个消息数据信号根作为e1,e2,...。 。 ek是多个消息数据信号M1,M2的根。 。 。 Mk,其中ei和ej对于i NOTEQUAL j是成对相对的。
    • 3. 发明授权
    • Broadcast encryption
    • 广播加密
    • US5592552A
    • 1997-01-07
    • US295207
    • 1994-09-24
    • Amos Fiat
    • Amos Fiat
    • H04L9/08H04L29/06H04L9/00
    • H04L63/0442H04L63/065H04L63/104H04L9/0836H04L2209/601
    • A selective broadcasting method operative to transmit a plurality of message data signals to a corresponding plurality of subscriber subsets within a set of subscribers, the method comprising receiving an indication of a privileged set comprising an individual subset and transmitting a message data signal from which a key can be extracted by members of the privileged set and cannot be extracted by any set of members outside the privileged set whose number of members is less than a predetermined resiliency, wherein the length of the message data signal is less than the sum of lengths of the message data signals required if an individual message data signal is transmitted to each subscriber in the privileged set.
    • 一种选择性广播方法,用于将多个消息数据信号发送到一组订户内的对应的多个订户子集,所述方法包括:接收包括单个子集的特权集合的指示,并发送一个消息数据信号,从该密钥 可以由特权集合的成员提取,并且不能由成员数小于预定弹性的特权集合之外的任何成员组提取,其中消息数据信号的长度小于 如果单独的消息数据信号被发送到特权集合中的每个用户,则需要消息数据信号。