Decryption: Decryption is the reverse process of encryption where the secret code (encrypted data) is converted back into its original form (plain text) using a key or password.
Cryptography: Cryptography refers to the practice and study of techniques used for secure communication in the presence of adversaries. It includes encryption, decryption, and other related concepts.
Symmetric Key Encryption: Symmetric key encryption uses a single key for both encryption and decryption processes. The same key is shared between sender and receiver, so both parties must keep it secure.