Editing Cryptosystem (section)

{{More sources|date=August 2024}}
{{More categories|date=January 2025}}{{short description|Suite of cryptographic algorithms needed to implement a particular security service}}
In [[cryptography]], a '''cryptosystem''' is a suite of [[cryptographic algorithm]]s needed to implement a particular security service, such as confidentiality ([[encryption]]).<ref>{{cite book|last1=Menezes|first1=A.|last2=Oorschot|first2=P. van|last3=Vanstone|first3=S.|title=Handbook of Applied Cryptography|year=1997|publisher=CRC Press|isbn=0-8493-8523-7|edition=5th|url-access=registration|url=https://archive.org/details/handbookofapplie0000mene}}</ref>

Typically, a cryptosystem consists of three algorithms: one for [[key generation]], one for encryption, and one for decryption. The term ''[[cipher]]'' (sometimes ''cypher'') is often used to refer to a pair of algorithms, one for encryption and one for decryption. Therefore, the term ''cryptosystem'' is most often used when the key generation algorithm is important. For this reason, the term ''cryptosystem'' is commonly used to refer to [[public key cryptography|public key]] techniques; however both "cipher" and "cryptosystem" are used for [[Symmetric-key algorithm|symmetric key]] techniques.