Acknowledgment: An acknowledgment is sent with the e-check to the sender to inform him about the status of the e-check.
Certification Authority: A bank or other organization issuing end-user certificates. Independently, third parties are available as other approval authorities that are authorized to issue certificates. In the US Treasury market, US Treasury customers have worked with the issuance of documents showing the account status and issuing certificates as the issuer of the certificates issued by the primary approval authority authorized by the banks acting as the approval authority.
Advice of payment (AOP): Payment notice is a form of money order information. The payment notice is attached to each e-check depending on the request.
Private Key: A secret mathematical key is used to generate digital signatures or to decrypt passwords of messages of a message. For each private key, only one public key is associated. With e-check, private keys, private signing key and private decryption key are used for signing and decryption. The private signature key is used to digitally sign and redeem e-checks, and is stored in the electronic check book. For each private signature key, there is a certificate that is used to describe the association of the private key with the public key of any party that needs to verify the validity of the signature generated. The private decryption key is used by the creditor software to decrypt the passwords of e-checks mailed by the debtor. The email enrollment process is used to ensure that the debtor is associated with the public key of the creditor of the e-check server, so that the e-checks are encrypted before being sent to the creditor.