{"id":15068063,"url":"https://github.com/dmlen/vigenerec","last_synced_at":"2026-03-05T08:32:15.187Z","repository":{"id":255609495,"uuid":"851125143","full_name":"DMLen/VigenereC","owner":"DMLen","description":"A C++ implementation of the Vigenère cipher","archived":false,"fork":false,"pushed_at":"2024-09-05T01:52:17.000Z","size":19,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"main","last_synced_at":"2024-10-20T08:10:30.690Z","etag":null,"topics":["cipher","cipher-algorithms","cplusplus","cpp","encryption","encryption-algorithms","encryption-decryption","vigenere","vigenere-cipher","vigenere-decoder"],"latest_commit_sha":null,"homepage":"","language":"C++","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/DMLen.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,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2024-09-02T13:23:06.000Z","updated_at":"2024-09-05T01:52:20.000Z","dependencies_parsed_at":"2024-09-06T09:51:48.341Z","dependency_job_id":null,"html_url":"https://github.com/DMLen/VigenereC","commit_stats":null,"previous_names":["dmlen/vigenerec"],"tags_count":1,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/DMLen%2FVigenereC","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/DMLen%2FVigenereC/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/DMLen%2FVigenereC/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/DMLen%2FVigenereC/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/DMLen","download_url":"https://codeload.github.com/DMLen/VigenereC/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":225844832,"owners_count":17533160,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","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":["cipher","cipher-algorithms","cplusplus","cpp","encryption","encryption-algorithms","encryption-decryption","vigenere","vigenere-cipher","vigenere-decoder"],"created_at":"2024-09-25T01:30:16.307Z","updated_at":"2026-03-05T08:32:15.136Z","avatar_url":"https://github.com/DMLen.png","language":"C++","funding_links":[],"categories":[],"sub_categories":[],"readme":"# VigenereC\n*A C++ implementation of the Vigenère cipher as described at [Wikipedia](https://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher)*\n\n\"...each letter of the plaintext is encoded with a different Caesar cipher, whose increment is determined by the corresponding letter of another text, the key.\"\n\nThis is a text encoder/decoder that is capable of encrypting and decrypting plaintext with a supplied key using Vigenère's cipher, which is based upon the Caesar cipher method of shifting/rotating letters. This implementation is NOT case-sensitive, and spaces are not counted in the provided key.\n\nThe program itself is a simple commandline tool. Compile the cpp code and run it, or find a pre-built .exe file in the releases tab.\n\nVerify results against [University of Denver's Vigenère encoder/decoder](https://www.cs.du.edu/~snarayan/crypt/vigenere.html)\n(Note: In each of these cases, the Key is used to encrypt as well as decrypt. Whitespaces and upper/lowercase are filtered out and ignored by this program.)\n\n| Plaintext  | Key | Ciphertext |\n| ------------- | ------------- | ------------- |\n| attacking tonight | OCULORHINOLARINGOLOGY | ovnlqbpvt hznzouz |\n| Humpty Dumpty sat on a wall | egg | lastze hastze wgz st g agrp |\n| Humpty Dumpty sat on a wall | The egg fell | abqtze iyxamf wez us e hles |\n| abcdefg | 1 | bcdefgh |\n| abcdefg | 10 | bbddffh |\n\nIn the example where keytext is \"1\", inputting a key of just one produces a caesar cipher by shifting each letter of the plaintext forward by that amount. A keytext of \"10\" DOES NOT result in a shift of 10, as the Vigenère algorithm considers each digit to be its own thing.\n\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdmlen%2Fvigenerec","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdmlen%2Fvigenerec","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdmlen%2Fvigenerec/lists"}