xoring

This is a discussion on xoring within the C++ Programming forums, part of the General Programming Boards category; how do i encrypt things that are say 10 characters long with a key that is 5. like this char ...

  1. #1
    Registered User Sekti's Avatar
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    xoring

    how do i encrypt things that are say 10 characters long with a key that is 5. like this

    char string[10];
    char key[5];

    string=string^key;

    only encrypts half of string.
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  2. #2
    Registered User rmullen3's Avatar
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    Go through each character and XOR it with the string and uh... use the key over again for all leftover sets of characters of string...?

    I don't know, that's a pretty simple encryption...

  3. #3
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    Use the key twice. Or extend the key.

    >string=string^key;

    Isn't this going wrong? The variables string and key are addresses. For encryption you need a loop and xor each character.

  4. #4
    Banned borko_b's Avatar
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    Code:
    #define KLEN 10
    #defien VLEN 200
    
    
    
    char val[2002];
    char key[322];
    
    char *pv = val;
    char *pk = key;
    
    while(*pv) {
        *pv ^= *pk;
        if(*pk) 
            pk++;
        else     
            pk = key;
        pv++;
    }

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