CryptoJS decrypted value differ from the original value

I am trying to encrypt some strings and decrypt it with the use of CryptoJS (AES-256). My javascript code: function hexStringToByte(str) { if (!str) { return new Uint8Array(); } …

How do I keep spaces in a string?

I am working with a substitution cipher, where each letter of the alphabet is represented by a letter from the substituted alphabet. function substitution(input, alphabet) { let str = ”; let …

Decrypt Crypto-js encrypted text with key with PHP

I’m using Crypto-js for encrypting password with a key and send it to server. I want to decrypt it in server using PHP. How this can be done? JS: let encKey = “Secret Passphrase”; let …

Problem with caesar cipher shift javascript

For a school project, I’m trying to create a website on encryption methods, but right now I have a problem with my Caesar one. I checked so many times but I can’t find out where is the problem in my code. I think the shift is what is wrong, but I don’t know what I could change to make it work, and I would be very happy if someone could help me. So, here is the html part : And here is my javascript code: You can also go here if you want to test what’s wrong directly: https://www.w3schools.com/code/tryit.asp?filename=FXJU1NAG37C0 Answer

Crypto.js decrypt with key and iv (vector) in byte arrays

I have to decrypt some strings which are AES encrypted. Example encrypted string: 129212143036071008133136215105140171136216244116 I have a key, and a vector (iv) supplied to me in a byte-array …