Decryption is the process of converting encrypted or ciphered data back into its original, plaintext form. It involves using a specific decryption algorithm or key to reverse the encryption process and recover the original message or data. In cryptography, encryption is performed to protect sensitive information from unauthorized access or interception. Decryption, on the other hand, allows authorized individuals or systems to retrieve and access the encrypted data. Decryption typically requires knowledge of the correct decryption key or algorithm, without which the encrypted data remains unreadable and unintelligible. It plays a critical role in secure communication, data protection, and maintaining confidentiality in various digital systems and applications.