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--- hardening [2022/08/23 09:11] – ash
+++ hardening [2022/09/12 17:44] (current) – external edit 127.0.0.1
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-Hardening refers to providing various means of protection in a computer system. Protection is provided in various layers and is often referred to as defense in depth. Protecting in layers means to protect at the host level, the application level, the operating system level, the user level, the physical level and all the sub-levels in between. Each level requires a unique method of security. A hardened computer system is a more secure computer system. Hardening is also known as system hardening. [[herding|[NO]]]
+=== Encryption ===
+= What is encryption ? =
+Encryption is the method to convert information into secret code that hides the information's true meaning. There are two main types of data encryption;  asymmetric encryption, also known as public-key encryption, and symmetric encryption. Modern encryption algorithms has replaced the outdated data encryption standard (DES), and provide confidentiality and drive key security initiatives including authentication, integrity, and non-repudiation
+- Authentication allows for the verification of a message’s origin
+- Integrity provides proof that a message’s contents have not changed since it was sent
+- Non-repudiation ensures that a message sender cannot deny sending the message.
+= Asymetric encryption =
+In asymmetric encryption - also known as public key encryption - the sender and the recipient use two different keys, a public key and a private key. Data encrypted with the public key can only be decrypted with the private key.
+= Symmetric encryption =
+In symmetric encryption, the same key both encrypts and decrypts data. For symmetric encryption to work, the two or more communicating parties must know what the key is; for it to remain secure, no third party should be able to guess or steal the key.
+assymetric encryption symmetric encryption DES confidentiality
+[[Nb:Sikkerhet:Utvikling:Hacking:1001Nbl | [Kryptering]]]
+En