Tham khảo tài liệu 'hacker professional ebook part 154', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | S Salt Sample S-Box Scalable Secrecy Secret Code Secret Key Cipher Security Security Through Obscurity Semiconductor Semigroup Session Key Set Shift Register Shuffle Sieve of Eratosthenes Significance Simple Substitution Software Source Code State Stationary Process Statistic Statistics Steganography Stochastic Stream Cipher Strength Strict Avalanche Criterion SAC Subjective Substitution SubstitutionPermutation Substitution Table Superencryption Surjective Switch Switching Function Symmetric Cipher Symmetric Group System System Design T Table Selection Combiner TEMPEST Transformer Transistor Transposition Trap Door Triple DES Truly Random Trust Truth Table Type I Error Type II Error U Unary Unexpected Distance Unicity Distance Uniform Distribution V Variable Size Block Cipher Voltage W Walsh Functions Weight Whitening White Noise Wire X XOR Absolute In the study of logic something observed similarly by most observers or something agreed upon or which has the same value each time measured. Something not in dispute unarguable and independent of other state. As opposed to contextual. AC Alternating Current Electrical power which repeatedly reverses direction of flow. As opposed to DC. Generally used for power distribution because the changing current supports the use of transformers. Utilities can thus transport power at high voltage and low current which minimize ohmic or I2R losses. The high voltages are then reduced at power substations and again by pole transformers for delivery to the consumer. Additive Combiner An additive combiner uses numerical concepts similar to addition to mix multiple values into a single result. One example is byte addition modulo 256 which simply adds two byte values each in the range and produces the remainder after division by 256 again a value in the byte range of . Subtraction is also an additive combiner. Another example is bit-level exclusive-OR which is addition mod 2. A bytelevel exclusive-OR is a polynomial addition.
