US Patent Issued to AMERICAN EXPRESS TRAVEL RELATED SERVICES on Aug. 12 for "Stateful hash-based signatures" (British, American Inventors)

ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,388,653, issued on Aug. 12, was assigned to AMERICAN EXPRESS TRAVEL RELATED SERVICES COMPANY INC. (New York).

"Stateful hash-based signatures" was invented by Hicham Lozi (Palo Alto, Calif.) and Peter John Markall (Burgess Hill, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are various embodiments for generating and verifying stateful hash-based signatures. A message hash of a message is generated using a cryptographic hash function. Then, the message hash is split into a predefined number of parts of equal size. Next, a value of a signature debt is calculated for each of the predefined number of parts of the message hash. Subse...