What is Business Owner's (or Receipt Issuer's) Digital Signature?

Answer:                

Xiippy uses a range of digital signatures in its operation for a range of reasons including fraud protection, tamper-resistance and non-reputability of purchase records. When a business owner issues a statement, it signs the contents of the statement using its currently-active identity key only owned by and known to the merchant. The signature assures tamper-resistance of the statement and can be used to verify the statement has genuinely been issued by the relevant business owner and that it has not been changed since the issuance. If a business owner, re-registers a POS station, the previous public key of the POS station will still remain on the server to help with the verification of previously-issued statements with older identity keys.