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However, privacy preservation is a critical issue in the power request system since malicious adversaries could obtain users\u2019 daily schedule through power transmission channel. Blind signature is an effective method of hiding users\u2019 private information. In this paper, we propose an untraceable blind signature scheme under the reputable modification digital signature algorithm (MDSA). Moreover, we put forward an improved credential\u2010based power request system architecture integrated with the proposed blind signature. In addition, we prove our blind signature\u2019s blindness and unforgeability under the assumption of Elliptic Curve Discrete Logarithm Problem (ECDLP). Meanwhile, we analyze privacy preservation, unforgeability, untraceability, and verifiability of the proposed scheme. Computational cost analysis demonstrates that our scheme has better efficiency compared with other two blind signatures.<\/jats:p>","DOI":"10.1155\/2021\/9988170","type":"journal-article","created":{"date-parts":[[2021,7,1]],"date-time":"2021-07-01T12:26:31Z","timestamp":1625142391000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["A Blind Signature\u2010Aided Privacy\u2010Preserving Power Request Scheme for Smart Grid"],"prefix":"10.1155","volume":"2021","author":[{"given":"Weijian","family":"Zhang","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhimin","family":"Guo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nuannuan","family":"Li","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4351-1700","authenticated-orcid":false,"given":"Mingyan","family":"Li","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qing","family":"Fan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1819-9332","authenticated-orcid":false,"given":"Min","family":"Luo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,7]]},"reference":[{"key":"e_1_2_12_1_2","unstructured":"HughesJ. 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