DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Lee, Jooyoung | - |
dc.contributor.advisor | 이주영 | - |
dc.contributor.author | Ha, Jincheol | - |
dc.date.accessioned | 2022-04-27T19:32:25Z | - |
dc.date.available | 2022-04-27T19:32:25Z | - |
dc.date.issued | 2021 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=948632&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/296198 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 정보보호대학원, 2021.2,[iv, 35 p. :] | - |
dc.description.abstract | The Rasta cipher, proposed by Dobraunig et al. (CRYPTO 2018), is an HE-friendly cipher enjoying the fewest ANDs per bit and the lowest ANDdepth among the existing ciphers. A novel feature of Rasta is that its affine layers are freshly and randomly generated for every encryption. In this paper, we propose a new variant of Rasta, dubbed Masta. Similarly to Rasta, Masta takes as input a (master) secret key and a nonce, and generates a keystream block for each counter. On the other hand, Masta has two main differences from Rasta: Masta uses modular arithmetic to support HE schemes over a non-binary plaintext space, and it uses a smaller number of random bits in the affine layers by defining them with finite field multiplication. In this way, Masta outperforms Rasta in a transciphering framework with BGV/FV-style HE schemes. Our implementation shows that Masta is 505 to 592 times faster in terms of the throughput on the client-side, while 4792 to 6986 times faster on the server-side. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | homomorphic encryption▼astream cipher▼atransciphering framework▼amodular arithmetic▼afinite field multiplication | - |
dc.subject | 동형 암호▼a스트림 암호▼a암호문 변환 프레임워크▼a모듈로 연산▼a유한체 곱셈 | - |
dc.title | (An) HE-friendly cipher using modular arithmetic | - |
dc.title.alternative | 모듈로 연산에 기반한 동형암호 친화적 비밀키 암호 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :정보보호대학원, | - |
dc.contributor.alternativeauthor | 하진철 | - |
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