encryption

The art or science, or system, of coding or ciphering data into symbolic form to disguise,

and thereby secure, the contents of a message. Generally in the form of firmware, rather than software, encryption logic commonly both scrambles and compresses message units (e.g., blocks or packets) prior to transmission. The receiving device is equipped with the necessary logic to decompress and decrypt the data. Private key is a symmetric encryption method that uses the secret same key to encrypt and decrypt data.

Public key is an asymmetric encryption method with an encryption (encoding) key that can be used by all authorized network users and a decryption (decoding) key that is kept secret. Encryption algorithms and mechanisms used in telecommunications include Advanced Encryption Standard (AES), Data Encryption Standard (DES), RSA, and Triple DES. See also AES, algorithm, block, code, cryptography, DES, message unit, packet, RSA, scramble, security, steganography, and Triple DES.

• Table I-5: ITU-T Series Recommendations
• Table J-1: Japanese Digital Hierarchy: J-carrier
• Table L-1: Longitudinal Redundancy Check (LRC)
• Table M-1: International Morse Code
• Table O-1: OSI Reference Model Layers
• Table O-2: G.709 Line Rates and Corresponding SDH/SONET Line Rates
• Table P-1: Evolution of PBX technology
• Table P-2: Military and Aviation Phonetic Alphabet
• Table Q-1: Selected ITU-T Q-Series Recommendations
• Table R-1: Before and After: Bell Operating Companies (BOCs) and Regional Bell Operating
• Table R-1: Before and After: Bell Operating Companies (BOCs) and Regional Bell Operating
• Table R-2: Coaxial Cable Types
• Table S-1: SDTV Scanning Formats
• Table S-2: SONET/SDH Signal Hierarchy
• Table T-1: North American Digital Hierarchy: T-carrier
• Table T-2: TCP/IP Protocol Suite
• Table V-1: Electromagnetic Signal Propagation Velocity (Approximate)
• Table V-2: Vertical Redundancy Check (VRC)
• Table V-3: Selected ITU-T V-Series Recommendations
• Table W-1: ITU-T Transmission Windows
• Table X-1: DSL Technology Comparisons
• Table X-2: ITU-T X Series Recommendation Groups
• Table X-3: Select X Series Recommendations
• TACS (Total Access Communications System)
• Tagged Image File Format-Fax (TIFF-F)