{"id":20784275,"url":"https://github.com/sohnryang/crypto-contest-2020","last_synced_at":"2026-04-21T15:33:03.633Z","repository":{"id":55655169,"uuid":"292745430","full_name":"sohnryang/crypto-contest-2020","owner":"sohnryang","description":"상받은 2020년 암호경진대회 솔루션","archived":false,"fork":false,"pushed_at":"2020-12-14T23:57:35.000Z","size":2872,"stargazers_count":0,"open_issues_count":0,"forks_count":1,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-03-11T23:17:49.023Z","etag":null,"topics":["block-cipher","crypto-contest","cryptography","hill-cipher","loop-unrolling"],"latest_commit_sha":null,"homepage":"","language":"Jupyter Notebook","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/sohnryang.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2020-09-04T04:05:16.000Z","updated_at":"2020-12-14T23:57:38.000Z","dependencies_parsed_at":"2022-08-15T05:40:38.173Z","dependency_job_id":null,"html_url":"https://github.com/sohnryang/crypto-contest-2020","commit_stats":null,"previous_names":[],"tags_count":1,"template":false,"template_full_name":null,"purl":"pkg:github/sohnryang/crypto-contest-2020","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sohnryang%2Fcrypto-contest-2020","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sohnryang%2Fcrypto-contest-2020/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sohnryang%2Fcrypto-contest-2020/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sohnryang%2Fcrypto-contest-2020/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/sohnryang","download_url":"https://codeload.github.com/sohnryang/crypto-contest-2020/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sohnryang%2Fcrypto-contest-2020/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":32097913,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-04-21T11:25:29.218Z","status":"ssl_error","status_checked_at":"2026-04-21T11:25:28.499Z","response_time":128,"last_error":"SSL_connect returned=1 errno=0 peeraddr=140.82.121.5:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["block-cipher","crypto-contest","cryptography","hill-cipher","loop-unrolling"],"created_at":"2024-11-17T14:27:31.961Z","updated_at":"2026-04-21T15:33:03.610Z","avatar_url":"https://github.com/sohnryang.png","language":"Jupyter Notebook","funding_links":[],"categories":[],"sub_categories":[],"readme":"# 암호경진대회 2020\n[![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2Fsohnryang%2Fcrypto-contest-2020.svg?type=shield)](https://app.fossa.com/projects/git%2Bgithub.com%2Fsohnryang%2Fcrypto-contest-2020?ref=badge_shield)\n\n\n## 문제 목록\n\n### 고전 암호\n- Hill cipher. 저번보다 어려움\n- 행렬 연산 이용. 연립방정식 해결?\n\n### 암호 구현\n- ARX 암호 최적화 문제. 아두이노에서 빠르게 실행되어야 함.\n  - loop unrolling, key scheduling 등의 최적화 기법 사용할 예정\n  - 최종 단계 최적화: 어셈블리 코드 사용\n- 문서화 필요, time-consumer로 추정\n\n### 블록 암호\n- padding validation code가 제공됨 (블랙박스임)\n  - 윈도우 DLL 사용, VM 필요할듯\n\n## 결과\n고등부 2등! 🎉🎉🎉\n\n\n## License\n[![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2Fsohnryang%2Fcrypto-contest-2020.svg?type=large)](https://app.fossa.com/projects/git%2Bgithub.com%2Fsohnryang%2Fcrypto-contest-2020?ref=badge_large)","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsohnryang%2Fcrypto-contest-2020","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fsohnryang%2Fcrypto-contest-2020","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsohnryang%2Fcrypto-contest-2020/lists"}