Cryptography 4 Computer security 3 Cryptanalysis 3 Security measures 3 Telecommunication 3 Data encryption (Computer science) 2 Mathematics 2 Public key cryptography 2 Abstract algebra-- Mathematics 1 Chiffres 1 Ciphers 1 Coding theory. Cryptography. Codage 1 Computer algorithms 1 Computer networks 1 Cryptographie 1 Cryptography-- Computer security-- Computer science 1 Genetic code -- Research -- History--Genetic Code--DNA -- history 1 Number theory-- Algebra-- Mathematics 1 Real time databases, 1 Security enhancement-Database system: 1 TDMRC Code, 1