dc.contributor.author | Jiang, Yao | |
dc.date.accessioned | 2021-09-23T06:40:46Z | |
dc.date.available | 2021-09-23T06:40:46Z | |
dc.date.created | 2020-12-07T12:14:24Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | Lecture Notes in Computer Science (LNCS). 2020, 12493 LNCS 529-558. | en_US |
dc.identifier.issn | 0302-9743 | |
dc.identifier.uri | https://hdl.handle.net/11250/2780614 | |
dc.description.abstract | Updatable encryption schemes allow for key rotation on ciphertexts. A client outsourcing storage of encrypted data to a cloud server can change its encryption key. The cloud server can update the stored ciphertexts to the new key using only a token provided by the client.
This paper solves two open problems in updatable encryption, that of uni-directional vs. bi-directional updates, and post-quantum security.
The main result in this paper is to analyze the security notions based on uni- and bi-directional updates. Surprisingly, we prove that uni- and bi-directional variants of each security notion are equivalent.
The second result in this paper is to provide a new and efficient updatable encryption scheme based on the Decisional Learning with Error assumption. This gives us post-quantum security. Our scheme is bi-directional, but because of our main result, this is sufficient. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Springer | en_US |
dc.title | The Direction of Updatable Encryption Does Not Matter Much | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | This version of the article will not be available due to copyright restrictions by Springer | en_US |
dc.source.pagenumber | 529-558 | en_US |
dc.source.volume | 12493 LNCS | en_US |
dc.source.journal | Lecture Notes in Computer Science (LNCS) | en_US |
dc.identifier.doi | https://doi.org/10.1007/978-3-030-64840-4_18 | |
dc.identifier.cristin | 1856881 | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |