This program takes a message and a custom key to perform encryption and decryption. Encryption: Each letter is shifted based on the corresponding letter in the key ...
The Vigenère cipher is a polyalphabetic substitution cipher, meaning it uses multiple substitution alphabets to encrypt the text. It is an improvement over simpler ciphers like the Caesar cipher and ...
Abstract: The primary objective of this paper is to detect and locate alterations in digital images to ensure their tamper-proofing. To achieve this, a fragile watermarking technique has been employed ...
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