Patent ID: 8032759

Claim:
A computer implemented method of verifying a digitally signed data: receiving a first signature of digitally signed data, wherein the first signature is a digital signature of data included in a first document having a first document encoding; receiving a second signature of digitally signed data, wherein the second signature is a digital signature of data included in the first document having a second document encoding, and wherein the first document encoding and the second document encoding are different document encodings; receiving a third signature of digitally signed data, wherein the third signature is a digital signature of data included in a canonicalized version of the first document having a canonical encoding, and wherein canonicalizing the first document includes providing a different order of data within the first document based on a canonical ordering; selecting a signature from the received first signature, the received second signature, and the received third signature, wherein the first signature, the second signature, and the third signature are associated with the first document to provide a digitally signed first document; and verifying the digitally signed data using the selected signature using a processor.