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	~~'''~~Encryption''' is the process of converting [[plaintext]] into [[ciphertext]], which is unreadable without the correct [[decryption]] key. It is a fundamental component of many forms of [[information security]], including [[data privacy]], [[confidentiality]], and [[integrity]].		== Encryption ==

	~~== Overview ==~~		[[File:Public_key_encryption_keys.svg\|thumb\|right\|Diagram illustrating public key encryption]]

	Encryption is ~~used to protect [[~~data~~]] during transmission or while stored on~~ a ~~[[computer system]]~~. ~~It uses an algorithm, or~~ [[~~cipher~~]], to ~~transform plaintext into ciphertext. The process is reversed by decryption, which converts the ciphertext back into its original plaintext form~~.		'''Encryption''' is the process of converting information or data into a code, especially to prevent unauthorized access. In the field of [[cryptography]], encryption is used to protect data confidentiality and ensure secure communication.

	== Types of Encryption ==		== Types of Encryption ==

	~~There are~~ two ~~main~~ types ~~of encryption~~: [[symmetric encryption]] and [[asymmetric encryption]].		Encryption can be broadly categorized into two types: [[symmetric encryption]] and [[asymmetric encryption]].

	=== Symmetric Encryption ===		=== Symmetric Encryption ===

	In symmetric encryption, the same key is used for both encryption and decryption. This ~~type of encryption~~ is ~~fast and~~ efficient~~, making it suitable~~ for ~~encrypting~~ large amounts of data~~. However, the~~ key ~~must be kept secret and securely exchanged between the parties involved, which can be a challenge~~.		In symmetric encryption, the same key is used for both encryption and decryption. This method is efficient for processing large amounts of data but requires secure key distribution.

	=== Asymmetric Encryption ===		=== Asymmetric Encryption ===

	Asymmetric encryption, also known as public key ~~encryption~~, uses ~~two different~~ keys: a public key ~~for encryption~~ and a private key ~~for decryption~~. This ~~eliminates the need for~~ secure key exchange, ~~but it is slower~~ and ~~requires more computational resources than symmetric~~ encryption.		Asymmetric encryption, also known as [[public key cryptography]], uses a pair of keys: a public key and a private key. The public key is used to encrypt data, while the private key is used to decrypt it. This method facilitates secure key exchange over insecure channels.

			== Public Key Infrastructure (PKI) ==

			Public key infrastructure (PKI) is a framework that enables secure, encrypted communication and authentication over networks. It involves the use of digital certificates, certificate authorities, and registration authorities to manage public key encryption.

	== Applications of Encryption ==		== Applications of Encryption ==

	Encryption is used in ~~a wide range of~~ applications, including:		Encryption is widely used in various applications, including:

			* [[Secure Sockets Layer]] (SSL) and [[Transport Layer Security]] (TLS) for secure web browsing.
			* [[Virtual Private Network]]s (VPNs) for secure remote access.
			* [[Email encryption]] to protect sensitive communications.
			* [[Disk encryption]] to secure data on storage devices.

			== Challenges in Encryption ==

	* [[Secure communication]]: Encryption is used to protect the confidentiality and integrity of data transmitted over networks, such as ~~emails, instant messages, and web browsing data.~~		While encryption provides significant security benefits, it also presents challenges such as:
	* [[Data storage]]: ~~Encryption is used to protect data stored on computer systems, such as files, databases, and backups.~~
	* [[Authentication]]: Encryption can be used to verify the identity of a user, device, or system.
	* [[Digital signatures]]: Encryption is used to create digital signatures, which provide non-repudiation and integrity for digital documents and transactions.

	== ~~See Also~~ ==		* Key management: Ensuring secure storage and distribution of encryption keys.
			* Performance: Balancing security with computational efficiency.
			* Legal and regulatory issues: Compliance with laws governing data protection and privacy.

			== Related Pages ==

	* [[Cryptography]]		* [[Cryptography]]
	* [[Data security]]		* [[Data security]]
	* [[Information security]]		* [[Information security]]
			* [[Digital signature]]

	[[Category:~~Encryption~~]]		[[Category:Cryptography]]
	[[Category:Information ~~security~~]]		[[Category:Information technology]]
	~~[[Category:Computer security]]~~

	~~{{stub}}~~

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'''Encryption''' is the process of converting [[plaintext]] into [[ciphertext]], which is unreadable without the correct [[decryption]] key. It is a fundamental component of many forms of [[information security]], including [[data privacy]], [[confidentiality]], and [[integrity]].

== Overview ==

Encryption is used to protect [[data]] during transmission or while stored on a [[computer system]]. It uses an algorithm, or [[cipher]], to transform plaintext into ciphertext. The process is reversed by decryption, which converts the ciphertext back into its original plaintext form.

== Types of Encryption ==

There are two main types of encryption: [[symmetric encryption]] and [[asymmetric encryption]].

=== Symmetric Encryption ===

In symmetric encryption, the same key is used for both encryption and decryption. This type of encryption is fast and efficient, making it suitable for encrypting large amounts of data. However, the key must be kept secret and securely exchanged between the parties involved, which can be a challenge.

=== Asymmetric Encryption ===

Asymmetric encryption, also known as public key encryption, uses two different keys: a public key for encryption and a private key for decryption. This eliminates the need for secure key exchange, but it is slower and requires more computational resources than symmetric encryption.

== Applications of Encryption ==

Encryption is used in a wide range of applications, including:

* [[Secure communication]]: Encryption is used to protect the confidentiality and integrity of data transmitted over networks, such as emails, instant messages, and web browsing data.
* [[Data storage]]: Encryption is used to protect data stored on computer systems, such as files, databases, and backups.
* [[Authentication]]: Encryption can be used to verify the identity of a user, device, or system.
* [[Digital signatures]]: Encryption is used to create digital signatures, which provide non-repudiation and integrity for digital documents and transactions.

== See Also ==

* [[Cryptography]]
* [[Data security]]
* [[Information security]]

[[Category:Encryption]]
[[Category:Information security]]
[[Category:Computer security]]

{{stub}}

Encryption - Revision history

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