Computer Network Secure Communication and Encryption Algorithm

Abstract-Due to the continuous progress of Internet technology, computer network communication service has replaced the traditional short message service and multimedia message service. In order to ensure the security of the instant messaging system, some advanced security encryption algorithms are used in the communication system to prevent attacks and information leakage. By using encryption algorithms, the network security research based. Our system operates on a network of nodes, where each node plays a crucial role in ensuring the security and integrity of transmitted data. The SHA-256 algorithm is employed for generating hash values, providing a secure and efficient means of verifying data integrity. Furthermore, we implement AES (Advanced Encryption Standard) for file encryption, enhancing the confidentiality and privacy of sensitive information. AES is a symmetric key encryption algorithm renowned for its strength and efficiency, by combining SHA-256 for integrity checking and AES for encryption, we Include Face Change Attaining methods to prevent from attackers In Face Change that can support both anonymizing real IDs among neighbor nodes and collecting real ID-based encountering information. For node anonymity, two encountering nodes communicate anonymously. Our system offers a robust defense against various cyber threats, including data breaches and unauthorized access. Prevent malicious actors from intercepting or tampering with encrypted data, our system employs advanced encryption techniques and secure communication protocols.