Questions tagged [encryption]

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I'm stuck on cs50 pset2 - crack

I am new to coding. I am trying to solve crack problem of cs50. The problem works hashing 1 character, but when i try to hash 2 characters i can't pass arguments from the string to the crypt function. ...
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1 answer
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My cipher algo is wiping out my keyword!

When my cipher algo sees an "a" it seems to wipe out the rest of the keyword, returning only a " ", which seems to erase the rest of my keyword, leaving my encryption useless. I've debugged this ...
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2 answers
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My vigenere code is not encrypting properly

This is my code: #include <stdio.h> #include <ctype.h> #include <cs50.h> #include <stdlib.h> #include <string.h> int main(int argc, string argv[]) { int index =0; ...
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Pset2 Caesar Hail dont know how to encrypt the plaintext

plz help me refine my code thx!! https://raw.githubusercontent.com/check50/davil3388/cs50/2017/fall/caesar/caesar.c?token=Aehv0R6qUjbNWPi_rOMKjS7ChP3tSlW1ks5aSK8MwA%3D%3D
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2 answers
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PSET2: Can't figure out what's wrong with my crack.c code?

I've been trying to get my crack code working for days now. It took me a while to even understand the problem but I think I have somewhat of a handle on it now. My code compiles completely fine but ...
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PSET 2 Vigenere - problem

My code works with a Key of BBB and the letters AAA and loops properly and skips spaces, numbers, punctuation but fails the tests. With a key of baz, it turns world say hello to xpsme, tbz ifmmp and ...
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2 answers
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CS50 pset2 Caesar's cipher - Compile but doesn't work?!? GetString() above and beyond

I'm working on pset2, Caesar's cipher part. I understand how to proceed to do the encryption and my program compile well. The first line of command allow the user to correctly enter his key. After the ...
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1 answer
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Caesar help, Yet again

Ok so i have the basic idea of caesar and heres what i have so far: #include <stdio.h> #include <cs50.h> #include <string.h> #include <math.h> #include <stdlib.h> #...
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4 answers
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How to Encrypt Plaintext Properly When it Contains Non-Alphabetical Chars?

My caesar.c doesn't encrypt plaintext properly when there are non-alphabetical chars in my plaintext word. Here's my code for encryption: int k = atoi(argv[1]); string plain_text = GetString(); // ...
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Why Doesn't Vigenere Give the Correct Output?

Hy guys , i have almost finished with vigenere.c and when i did several tests it was doing well , but when ai tried to encrypt "Meet me at the park at eleven am" using as a keyword "bacon" that's the ...