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Some classical/modern ciphers in C language and Python to encrypt and decrypt important information and keep the information safe, such as integrity, authentication, confidentiality and availability of the data. Some implemented ciphers are: Affine, DES and AES (with modes of operation for BMP images)
This project implements the International Data Encryption Algorithm (IDEA) in Output Feedback (OFB) mode, combined with Schnorr signature for data integrity and Elliptic Curve Diffie-Hellman (ECDH) for secure key exchange. It ensures robust encryption, authentication, and secure communication.