00000nam 2200000zi 4500 9.927932 CaOODSP 20230929085252 m o d f cr cn||||||||| 230929t20232023onca ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre FB3-5/2023-50E-PDF Kazmi, Raza Ali, author. Anonymous credentials : secret-free and quantum-safe / by Raza Ali Kazmi and Cyrus Minwalla. [Ottawa] : Bank of Canada = Banque du Canada, 2023. ©2023 1 online resource (15 pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier Staff working paper = Document de travail du personnel, 1701-9397 ; 2023-50 "September 28, 2023." Cover title. Includes bibliographical references (pages [14]-15). "An anonymous credential mechanism is a set of protocols that allows users to obtain credentials from an organization and demonstrate ownership of these credentials without compromising users' privacy. In this work, we construct the first secret-free and quantum-safe credential mechanism. The scheme is secret-free in the sense that an organization does not need to guard a secret key. The scheme is also lightweight in construction. Security of the scheme relies on the ability of the organization to maintain the integrity of a publicly known data structure - namely, a Merkle tree - that utilizes a quantum-safe, partially homomorphic hash function as a foundational primitive. We also construct a simple, quantum-safe, zero-knowledge argument of knowledge of membership in the Merkle tree. Additionally, we explore a concrete instantiation of the scheme and show it to be practically efficient for the core functions of enrollment and verification"--Abstract, page 2. Includes abstracts in English and French. Identification cards. Digital currency. Banks and banking, Central Research. Cartes d'identité. Monnaie électronique. Banques centrales Recherche. Bank of Canada, issuing body. Staff working paper (Bank of Canada) 1701-9397 ; 2023-50. (CaOODSP)9.806221 PDF 580 KB https://publications.gc.ca/collections/collection_2023/banque-bank-canada/FB3-5-2023-50-eng.pdf