- substitution system
- substitution system,a cryptographic system in which the letters of the plaintext retain their original positions but are replaced by other letters.
Useful english dictionary. 2012.
substitution system
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Substitution cipher — In cryptography, a substitution cipher is a method of encryption by which units of plaintext are replaced with ciphertext according to a regular system; the units may be single letters (the most common), pairs of letters, triplets of letters,… … Wikipedia
Substitution of variables — In mathematics, substitution of variables (also called variable substitution or coordinate transformation) refers to the substitution of certain variables with other variables. Though the study of how variable substitutions affect a certain… … Wikipedia
Substitution (law) — In legal terms, the Right of Substitution is a statutory right of all parties except the State. It is the right to change the presiding court official with or without cause.Judges are usually given cases randomly within a jurisdiction (unless… … Wikipedia
Substitution instance — In propositional logic, a substitution instance of a propositional formula is a second formula obtained by replacing symbols of the original formula by other formulas. A key fact is that any substitution of a tautology is again a tautology.… … Wikipedia
Substitution (Kryptographie) — Als Substitution (von lateinisch: substituere = „ersetzen“) bezeichnet man in der Kryptographie, also in dem Wissenschaftszweig der Kryptologie, der sich mit den Geheimschriften befasst, eine der beiden grundlegenden Verschlüsselungsklassen.[1]… … Deutsch Wikipedia
system of equations — or simultaneous equations In algebra, two or more equations to be solved together (i.e., the solution must satisfy all the equations in the system). For a system to have a unique solution, the number of equations must equal the number of unknowns … Universalium
substitution cipher — noun a method of encryption by which units of plaintext are substituted with ciphertext according to a regular system; the units may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth.… … Wiktionary
Sensory substitution — means to transform the characteristics of one sensory modality into stimuli of another sensory modality. It is hoped that sensory substitution systems can help handicapped people by restoring their ability to perceive a certain defective sensory… … Wikipedia
Post canonical system — A Post canonical system, as created by Emil Post, is a string manipulation system that starts with finitely many strings and repeatedly transforms them by applying a finite set of specified rules of a certain form, thus generating a formal… … Wikipedia
Thermodynamic system — A thermodynamic system is a precisely defined macroscopic region of the universe, often called a physical system, that is studied using the principles of thermodynamics. All space in the universe outside the thermodynamic system is known as the… … Wikipedia
