Editing Key (cryptography) (section)

== Establishment scheme ==
{{Main|Key exchange}}
The security of a key is dependent on how a key is exchanged between parties. Establishing a secured communication channel is necessary so that outsiders cannot obtain the key. A key establishment scheme (or key exchange) is used to transfer an encryption key among entities. Key agreement and key transport are the two types of a key exchange scheme that are used to be  remotely exchanged between entities . In a key agreement scheme, a secret key, which is used between the sender and the receiver to encrypt and decrypt information, is set up to be sent indirectly. All parties exchange information (the shared secret) that permits each party to derive the secret key material. In a key transport scheme, encrypted keying material that is chosen by the sender is transported to the receiver. Either symmetric key or asymmetric key techniques can be used in both schemes.<ref name=NIST/>

The [[Diffie–Hellman key exchange]] and [[Rivest-Shamir-Adleman]] (RSA) are the most two widely used key exchange algorithms.<ref name=":1">{{Cite book|last1=Yassein|first1=M. B.|last2=Aljawarneh|first2=S.|last3=Qawasmeh|first3=E.|last4=Mardini|first4=W.|last5=Khamayseh|first5=Y.|title=2017 International Conference on Engineering and Technology (ICET) |chapter=Comprehensive study of symmetric key and asymmetric key encryption algorithms |date=2017|chapter-url=https://ieeexplore.ieee.org/document/8308215/;jsessionid=aTy3qyMmnoiUUKufk8VEl4llW1jnhntWSm9CUa21rjkJ3qW3bths!861039390|pages=1–7|doi=10.1109/ICEngTechnol.2017.8308215|isbn=978-1-5386-1949-0 |s2cid=3781693 }}</ref> In 1976, [[Whitfield Diffie]] and [[Martin Hellman]] constructed the [[Diffie–Hellman key exchange|Diffie–Hellman]] algorithm, which was the first public key algorithm. The [[Diffie–Hellman key exchange|Diffie–Hellman]] key exchange protocol allows key exchange over an insecure channel by electronically generating a shared key between two parties. On the other hand, [[Rivest–Shamir–Adleman|RSA]] is a form of the asymmetric key system which consists of three steps: key generation, encryption, and decryption.<ref name=":1" />

Key confirmation delivers an assurance between the key confirmation recipient and provider that the shared keying materials are correct and established. The [[National Institute of Standards and Technology]] recommends key confirmation to be integrated into a key establishment scheme to validate its implementations.<ref name=NIST/>