Techniques and Tools for Encryption, IPSec and VPN
Ameur Salem Zaidoun · 2022
Encryption is a very old technique used to ensure the confidentiality of information both locally and through a network. Its importance is measured by the time needed to crack the code. Cryptography has been used for centuries to send critical information between leaders and individuals, especially in circumstances of war. Encryption is a security mechanism of capital importance. Encryption consists of finding ways to obtain a cryptogram based on a text that is to be secured. Cryptoanalysis is a technique used by hackers to break encryption. It consists of analyzing an encrypted text with the purpose of obtaining the corresponding plain text. The evolution of computing and transmission techniques created a new challenge: confidentiality. Virtual Private Networks use the simple principle of the tunnel, which is a secure encapsulation by encryption.