Wat is een PGP?
In 1991 besloot de Amerikaan Phil Zimmerman om dit systeem in te zetten voor de beveiliging van digitale communicatie, met name e-mails. Hij noemde zijn systeem Pretty Good Privacy (PGP). PGP combineert traditionele encryptie met asymmetrische cryptografie om berichten onleesbaar te maken.
Hoe ziet PGP eruit?
OpenPGP-cryptografie is gebaseerd op een schema van asymmetrische cryptografie, oorspronkelijk op het RSA-algoritme. Dit houdt in dat er twee verschillende sleutels zijn, een publieke en een private sleutel. De publieke sleutel wordt gedeeld met anderen en wordt gebruikt om data mee te versleutelen.
What is ring signature in cryptography?
Ring signature. In cryptography, a ring signature is a type of digital signature that can be performed by any member of a group of users that each have keys. Therefore, a message signed with a ring signature is endorsed by someone in a particular group of people.
What is the meaning of cryptography?
Cryptography or cryptology (from Ancient Greek: κρυπτός, translit. kryptós “hidden, secret”; and γράφειν graphein, “to write”, or -λογία -logia, “study”, respectively) is the practice and study of techniques for secure communication in the presence of third parties called adversaries.
What is a ring in math?
In essence, a ring is a set in which we can do addition, subtraction [ a b = a + ( -b )], and multiplication without leaving the set. With respect to addition and multiplication, the set of all n -square matrices over the real numbers is a ring.
What is the history of cryptography?
Classic cryptography. The Greeks of Classical times are said to have known of ciphers (e.g., the scytale transposition cipher claimed to have been used by the Spartan military). Steganography (i.e., hiding even the existence of a message so as to keep it confidential) was also first developed in ancient times.