Encryption converts plaintext to ciphertext for secure communication.Symmetric encryption uses the same key for encryption and decryption.Asymmetric encryption utilizes two keys: public and private.Hybrid encryption combines symmetric and asymmetric methods for security and speed.TLS/SSL protocols safeguard internet data transmission with encryption.Encryption algorithms are classified based on key usage and structure.Symmetric ciphers like AES, 3DES, and IDEA use a single key.Asymmetric algorithms like RSA and ECC involve public-private key pairs.Cipher types include block ciphers (AES, DES) and stream ciphers (RC4, ChaCha20).Hybrid encryption efficiently combines the best of symmetric and asymmetric encryption.