The digital signature
What is a digital signature ? Like a signature, a digital signature allows to authenticate the emitter of the message and verify the message has not... »
Asymmetric cryptography
What is the problem with the symmetric cryptography ? With the symmetric cryptography, a same password is used to encrypt and decrypt a message. The problem... »
The hash functions
What is a hash function ? A hash function takes any string as input and computes a fixed size fingerprint. The hashes of two equal messages... »