avaimenvaihto
Avaimenvaihto is a Finnish term that literally means "key exchange" and can refer to two general concepts in security. In information security, avaimenvaihto describes the process by which two or more parties establish a shared cryptographic key for secure communication. In physical security, it describes changing or replacing mechanical keys or cores in locks to prevent access by former key holders.
In cryptography, key exchange protocols enable two parties to agree on a common key over an insecure
In physical security, avaimenvaihto refers to rekeying or replacing locks so that old keys no longer work.
Considerations in both domains include cost, downtime, key management, and the risk of keys being compromised
See also: public-key cryptography, Diffie-Hellman, rekeying, lock cylinder.