RSA ( Rivest Shamir Adleman )is crypthograph system that used to give a secret information and digital signature . Its security based on Integer Factorization Problem (IFP). RSA uses an asymetric key. RSA was created by Rivest, Shamir, and Adleman in 1977. Every user have a pair of key, public key and private key. Public key (e) . You may choose any number for e with these requirements, 1< e <Æ (n), where Æ (n)= (p-1) (q-1) ( p and q are first-rate), gcd (e,Æ (n))=1 (gcd= greatest common divisor). Private key (d). d=(1/e) mod(Æ (n)) Encyption (C) . C=Mª mod(n), a = e (public key), n=pq Descryption (D) . D=C° mod(n), o = d (private key
標(biāo)簽：
crypthograph
information
Adleman
Rivest
上傳時(shí)間：
2017-09-01
上傳用戶：chfanjiang
#include <stdio.h>
#include <stdlib.h>
#define SMAX 100
typedef struct SPNode
{
int i,j,v;
}SPNode;
struct sparmatrix
{
int rows,cols,terms;
SPNode data [SMAX];
};
sparmatrix CreateSparmatrix()
{
sparmatrix A;
printf("\n\t\t請(qǐng)輸入稀疏矩陣的行數(shù)，列數(shù)和非零元素個(gè)數(shù)（用逗號(hào)隔開(kāi)）:");
scanf("%d,%d,%d",&A.cols,&A.terms);
for(int n=0;n<=A.terms-1;n++)
{
printf("\n\t\t輸入非零元素值（格式：行號(hào)，列號(hào)，值）:");
scanf("%d,%d,%d",&A.data[n].i,&A.data[n].j,&A.data[n].v);
}
return A;
}
void ShowSparmatrix(sparmatrix A)
{
int k;
printf("\n\t\t");
for(int x=0;x<=A.rows-1;x++)
{
for(int y=0;y<=A.cols-1;y++)
{
k=0;
for(int n=0;n<=A.terms-1;n++)
{
if((A.data[n].i-1==x)&&(A.data[n].j-1==y))
{
printf("%8d",A.data[n].v);
k=1;
}
}
if(k==0)
printf("%8d",k);
}
printf("\n\t\t");
}
}
void sumsparmatrix(sparmatrix A)
{
SPNode *p;
p=(SPNode*)malloc(sizeof(SPNode));
p->v=0;
int k;
k=0;
printf("\n\t\t");
for(int x=0;x<=A.rows-1;x++)
{
for(int y=0;y<=A.cols-1;y++)
{
for(int n=0;n<=A.terms;n++)
{
if((A.data[n].i==x)&&(A.data[n].j==y)&&(x==y))
{
p->v=p->v+A.data[n].v;
k=1;
}
}
}
printf("\n\t\t");
}
if(k==1)
printf("\n\t\t對(duì)角線元素的和：:%d\n",p->v);
else
printf("\n\t\t對(duì)角線元素的和為：:0");
}
int main()
{
int ch=1,choice;
struct sparmatrix A;
A.terms=0;
while(ch)
{
printf("\n");
printf("\n\t\t 稀疏矩陣的三元組系統(tǒng) ");
printf("\n\t\t*********************************");
printf("\n\t\t 1------------創(chuàng)建 ");
printf("\n\t\t 2------------顯示 ");
printf("\n\t\t 3------------求對(duì)角線元素和");
printf("\n\t\t 4------------返回 ");
printf("\n\t\t*********************************");
printf("\n\t\t請(qǐng)選擇菜單號(hào)（0-3）:");
scanf("%d",&choice);
switch(choice)
{
case 1:
A=CreateSparmatrix();
break;
case 2:
ShowSparmatrix(A);
break;
case 3:
SumSparmatrix(A);
break;
default:
system("cls");
printf("\n\t\t輸入錯(cuò)誤！請(qǐng)重新輸入！\n");
break;
}
if (choice==1||choice==2||choice==3)
{
printf("\n\t\t");
system("pause");
system("cls");
}
else
system("cls");
}
}
標(biāo)簽：
數(shù)組
子系統(tǒng)
上傳時(shí)間：
2020-06-11
上傳用戶：ccccy
