How Do Cryptographic Hash Functions Work in Email Authentication?
One of the common uses of cryptographic hash functions in email marketing is through technologies like DKIM (DomainKeys Identified Mail). DKIM adds a digital signature to the header of an email. This signature is created using a cryptographic hash function, ensuring that the email content has not been tampered with during transit. When the recipient's email server receives the email, it can verify the signature by recalculating the hash and comparing it with the one in the email header.