出典:Wikipedia
出典:『Wikipedia』 (2011/07/11 21:23 UTC 版)
DomainKeys Identified Mail (DKIM) is a method for associating a domain name to an email, thereby allowing an organization to take responsibility for a message in a way that can be validated by a recipient. Remarkably, responsibility can be claimed independently of the message's actual authors or recipients. The validation technique is based on public-key cryptography: Responsibility is claimed by the signer by adding a domain name to the message and then also affixing a digital signature of it and the message. The value is placed in the DKIM-Signature: header field. The verifier recovers the signer's public key using the DNS, and then verifies the signature.