Gerard Costa Carla Marín Grup: 4tB Professora: Ivón.

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Transcripción de la presentación:

Gerard Costa Carla Marín Grup: 4tB Professora: Ivón

 1- Some introduction to cryptography  2- Prime numbers  Video  Conclusion

 Codi de substitució: En criptografia, un xifrat de substitució és un mètode de codificació mitjançant el qual les unitats de text pla es substitueixen amb text xifrat.  Codi transposició: és un mètode de xifrat pel qual les posicions de les unitats de text pla.  Cipher: és un algorisme per realitzar el xifrat ordenació xifrat d'una sèrie de passos ben definits que es poden seguir com a procediment.  Desxifrar: és l'anàlisi de documents escrits en llengües antigues, on es desconeix l'idioma, o el coneixement de la llengua s'ha perdut.

 Prime number: is a natural number greater than 1 that has no positive divisors other than 1 and itself.  Relative primes: Two integers are relatively prime if they share no common positive factors (divisors) except 1. Using the notation to denote the greatest common divisor, two integers and are relatively prime if.  Greatest Common Divisor: also known as the greatest common factor (gcf), or highest common factor (hcf), of two or more integers (at least one of which is not zero), is the largest positive integer that divides the numbers without a remainder

 IGHY