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    • 1. 发明公开
    • 고속 공개키 암호시스템의 고속 곱셈 역원 방법 및 시스템
    • 高速公共密钥系统快速反演方法与系统
    • KR1020080067429A
    • 2008-07-21
    • KR1020070004695
    • 2007-01-16
    • 충북대학교 산학협력단
    • 유영갑김용대최종화박진섭안영일
    • G06F17/10G06F17/00
    • G06F7/721H04L9/30
    • A method and a system for rapidly computing multiplicative inversion in a fast public-key crypto-system are provided to compute multiplicative inversion of a finite field by only using addition, subtraction and shifting operation to improve a computing speed. A system for computing multiplicative inverses includes a controller(201), first through sixth multiplexers(202a,202b,202c,202d,206a,206b), first, second, third and fourth registers(204a,204b,204c,204d), and a corrector(208). The controller determines whether an inputted variable is an odd number or an even number and selects addition or subtraction. The first, second, third and fourth multiplexers receive a prime of a finite field, a modular inverse and initial variables and output selected values under the control of the controller. The first, second, third and fourth registers are respectively connected to output ports of the first, second, third and fourth multiplexers, receive and store the prime, an input variable selected by the controller, 0 and 1 and perform a shifting operation on the received values. The fifth and sixth multiplexers select values stored in the first, second, third and fourth registers. The corrector performs addition and subtraction on the variables output from the fifth and sixth multiplexers.
    • 提供了一种用于快速计算快速公钥密码系统中的乘法反演的方法和系统,用于仅通过加法,减法和移位操作来计算有限域的乘法反演,以提高计算速度。 用于计算乘法反转的系统包括控制器(201),第一到第六复用器(202a,202b,202c,202d,206a,206b),第一,第二,第三和第四寄存器(204a,204b,204c,204d) 校正器(208)。 控制器确定输入的变量是奇数还是偶数,并选择加法或减法。 第一,第二,第三和第四多路复用器在控制器的控制下接收有限域的素数,模数反相和初始变量并输出所选择的值。 第一,第二,第三和第四寄存器分别连接到第一,第二,第三和第四多路复用器的输出端口,接收和存储素数,由控制器0和1选择的输入变量,并对其进行移位操作 收到的价值。 第五和第六多路复用器选择存储在第一,第二,第三和第四寄存器中的值。 校正器对从第五和第六多路复用器输出的变量执行加法和减法。
    • 2. 发明公开
    • 전송 중 데이터 오류의 산사태 효과를 극복할 수 있는 암호화 방법
    • 在传输过程中容易发生数据错误的AVALANCHE效应的容错图像的方法
    • KR1020100068622A
    • 2010-06-24
    • KR1020080127036
    • 2008-12-15
    • 충북대학교 산학협력단
    • 유영갑안영일김한벼리
    • H04L9/18H04L9/16H04L9/06
    • H04L9/065H04L1/004H04L2209/34
    • PURPOSE: An encryption method is provided to restore error bits through the estimation of dispersed error bits by applying an rearranging method of data about a cryptogram. CONSTITUTION: A cryptogram data is divided according to a transmission unit. A matrix conversion step is executed in order to remove bits overlapped according to a transmission unit. The alignment direction of cryptogram data transformed to the matrix is rearranged. The rearranged cryptogram data is transmitted. The rearranged cryptogram data is received. The rearranged cryptogram data is reversely rearranged in an original direction. An ECC(Error Correcting Code) decoder revises the error of the rearranged data by using a parity bit.
    • 目的:通过应用关于密码数据的重新排列方法,提供了通过估计分散错误位来恢复错误位的加密方法。 构成:根据传输单位划分密码数据。 执行矩阵转换步骤以便去除根据传输单元重叠的比特。 转换到矩阵的密码数据的排列方向被重新排列。 重新排列的密码数据被传输。 接收到重新排列的密码数据。 重新排列的密码数据在原始方向上反向重新排列。 ECC(纠错码)解码器通过使用奇偶校验位来修正重新排列的数据的错误。