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    • 8. 发明授权
    • Secure one-way authentication communication system
    • 安全单向认证通信系统
    • US06430690B1
    • 2002-08-06
    • US09628045
    • 2000-07-28
    • Scott A. VanstoneAshok V. VadekarRobert J. LambertRobert P. Gallant
    • Scott A. VanstoneAshok V. VadekarRobert J. LambertRobert P. Gallant
    • G06F124
    • G07F7/1008G06Q20/341G06Q20/40975H04L9/3263H04L9/3271H04L9/3273
    • A protocol for authenticating at least one of a pair of first and second correspondents C and T in a data communication system, the method comprising the steps or storing a public key in the first correspondent C; computing a shared secret by the second correspondent T incorporating the public key C; storing the shared secret in the first correspondent C: the second correspondent T generating a challenge value a; the first correspondent C transmitting to the second correspondent T information including the stored public key C; the second correspondent T computing a test shared secret from the received public key C; the first and second correspondents computing response signals using the challenge value z and the shared secret in a one-way function fr; and the first correspondent C transmitting the computed response signal to the second correspondent T whereby the second correspondent verifies the first correspondent.
    • 一种用于在数据通信系统中验证一对第一和第二通信对象C和T中的至少一个的协议,所述方法包括以下步骤或在第一对应C中存储公共密钥; 由包含公共密钥C的第二记者T计算共享秘密; 将共享秘密存储在第一通信对象C中:生成询问值a的第二通信对象T; 第一通讯员C发送到包括存储的公开密钥C的第二通讯员T信息; 第二通讯员T从所接收的公钥C计算测试共享秘密; 第一和第二记者使用挑战值z和单向函数fr中的共享秘密来计算响应信号; 并且第一通信对象C将计算出的响应信号发送到第二通信对象T,由此第二对方验证第一通信对方。
    • 9. 发明授权
    • Method and apparatus for elliptic curve scalar multiplication
    • 椭圆曲线标量乘法的方法和装置
    • US07412062B2
    • 2008-08-12
    • US11687773
    • 2007-03-19
    • Robert J. LambertAshok VadekarAdrian Antipa
    • Robert J. LambertAshok VadekarAdrian Antipa
    • H04L9/00
    • G06F7/725G06F7/722
    • The applicants have recognized an alternate method of performing modular reduction that admits precomputation. The precomputation is enabled by approximating the inverse of the truncator T, which does not depend on the scalar.The applicants have also recognized that the representation of a scalar in a τ-adic representation may be optimized for each scalar that is needed.The applicants have further recognized that a standard rounding algorithm may be used to perform reduction modulo the truncator.In general terms, there is provided a method of reducing a scalar modulo a truncator, by pre-computing an inverse of the truncator. Each scalar multiplication then utilizes the pre-computed inverse to enable computation of the scalar multiplication without requiring a division by the truncator for each scalar multiplication.
    • 申请人已经认识到承认预先计算的执行模块化减少的替代方法。 通过逼近截断器T的反向来实现预计算,其不依赖于标量。 申请人还认识到,可以针对所需的每个标量来优化标量的代表性。 申请人进一步认识到,可以使用标准舍入算法来执行缩减模数截断器。 一般而言,提供了一种通过预先计算截断器的倒数来减少标量模截断器的方法。 每个标量乘法然后利用预先计算的逆来实现标量乘法的计算,而不需要每个标量乘法的截断器的除法。