Moreover, the present invention provides for Bell State measurements (BSMs) to be made at the signature delegate, the delegatory signature authorizer entity and the third-party verification entity to allow the original signer (i.e., the signature delegator) to securely delegate signature to a signature delegate and perform an event, such as a payment process or the like.Ī system for quantum-level cryptography of delegated digital signatures defines first embodiments of the invention. ![]() In specific embodiments of the invention, six quantum particles are entangled with two particles assigned to both the third-party verification entity and the delegatory signature authorizer entity. Specifically, the present invention provides for entangling at least four quantum particles, with one particle assigned to each of a third-party verification entity (e.g., third-party payment authority), a signature delegate, a delegatory signature authorizer entity (e.g., a financial institution) and a signature requester entity (e.g., a merchant). In other words quantum-level computing provides for delegate signatures with absolute security, which is not possible using only conventional classical computing protocols. By implementing quantum-level computing principles the present invention provides delegate signatures that are unclonable, unforgeable and can not be repudiate. Its sole purpose is to present some concepts of one or more embodiments in a simplified form as a prelude to the more detailed description that is presented later.Įmbodiments of the present invention address the above needs and/or achieve other advantages by providing for quantum-level cryptography of delegated digital signatures. This summary is not an extensive overview of all contemplated embodiments and is intended to neither identify key or critical elements of all embodiments, nor delineate the scope of any or all embodiments. ![]() The following presents a simplified summary of one or more embodiments in order to provide a basic understanding of such embodiments. Strong undeniability means that a signature delegate cannot repudiate or otherwise reject a delegate signature after they have created it. Strong identifiability means that any party can determine the identity of the corresponding signature delegate from the delegate's signature. Strong unforgeability means that third parties, as well as the signature delegator, who are not designated as delegate signers cannot create a valid delegate signature. Specifically, the desired systems, methods, computer program products and the like should impart strong unforgeability, identifiability and undeniability into the digital delegate signature process. Therefore, a need exists to develop systems, methods, computer program products and the like that provide for absolute security in delegate signature protocols. In existing digital technology, delegate signatures contain classical signature group label names that are based on computational complexity problems, therefore the methodologies tend to be unsecure and, as a result, are not safe in many operations. ![]() Such a protocol is typically implemented in instances in which the signature delegator is temporarily unavailable/incapacitated, lacks computational power/resources or under time constraints that the signature delegator is unable to meet. A specific digital signature protocol allows an entity referred to as a signature delegator, otherwise referred to as a designator or original signer, to delegate another entity referred to a signature delegate to sign on behalf of signature delegator. In digital signature communication cryptographic techniques play a vital role in ensuring the integrity of the digital signature. The present invention relates to quantum-level cryptography and, more specifically, implementing quantum-level cryptography for delegated digital signatures.
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