ENCRYPTION & DECRYPTION OF FILE(CRYPTOGRAPHY) - File Operations Source Code in C

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Home » C Home » File Operations Home » ENCRYPTION & DECRYPTION OF FILE(CRYPTOGRAPHY)

A D V E R T I S E M E N T

Title	ENCRYPTION & DECRYPTION OF FILE(CRYPTOGRAPHY)
Author	MURALI KUMAR .P
Author Email	murali_ece2003 [at] yahoo.co.in
Description	The encryption program converts a DAT file into BMP file with a password.Then decryption is done by adding e wtih bmp file name and opened with password.The decrypted file can be found using(func)type defilename. D:dosbasedTURBOC>encrypt enter file name to encrypt test.dat enter password[ space to end ] **** D:dosbasedTURBOC>decrypt enter file name to decrypt etest.bmp enter password[ space to end ] **** D:dosbasedTURBOC>type test.dat The dawn of a new PC era. The first 64-bit processor -G5. D:dosbasedTURBOC>type detest.dat The dawn of a new PC era. The first 64-bit processor -G5. D:dosbasedTURBOC> Encrypted file: etest.bmp
Category	C » File Operations
Hits	390561
Code	Select and Copy the Code
/* Encryption Program / #include<stdio.h> #include<string.h> char map1[]= "aeiostbcdfghjklmnpqruvwxyz0123456789AEIOSTBCDFGHJKLMNPQRUVWXYZ "; char map2[]= "otsiaehfbdgclnjkmuypzqvwxr4697081325OTSIAEHFBDGCLNJKMUYPZQVWXR "; void main() { char fn[20],m1,m2,tfn[20],p1[10]; FILE f1,f2; int i=0,j=0,flag=0,l,a,k; printf(" enter file name to encrypt "); scanf("%s",fn); f1=fopen(fn,"r");/ OPENS SOURCE FILE / if(f1==NULL){ printf(" cannot open file"); exit(0); } printf(" enter password[ space to end ] "); while((int)(m1=getch())!=32) { printf(""); p1[i]=m1; i++; } p1[i]='

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