The transformation of a message into a ciphertext using a key, with decryption recovering the message using an appropriate key. Confidentiality and message authentication are separate properties; an encryption scheme needs explicit security hypotheses.
Recovery of a plaintext from a ciphertext using an appropriate key. Correctness requires the decryption operation to invert the specified encryption operation on supported messages.
End-to-end encryption protects content between specified ultimate application endpoints, rather than merely protecting transport to an intermediary that may read it. A claimed provider-excluding secrecy property requires that provider to lack the relevant decryption capability. Endpoint compromise and communication metadata remain separate issues.
Articles by others on the same topic
Encryption is the process of converting information or data into a code to prevent unauthorized access. This process involves using algorithms and keys to transform readable data (plaintext) into an unreadable format (ciphertext). Only those who possess the correct key can decrypt the data back into its original form. Encryption serves various purposes, including: 1. **Data Security**: Protecting sensitive information from unauthorized access, ensuring that only intended recipients can read it.
