{"id":21900949,"url":"https://github.com/utsavpatel562/computer-network-and-security-","last_synced_at":"2026-02-28T05:04:41.393Z","repository":{"id":224607682,"uuid":"763728783","full_name":"utsavpatel562/Computer-Network-and-Security-","owner":"utsavpatel562","description":"COMPUTER NETWORK and SECURITY","archived":false,"fork":false,"pushed_at":"2024-04-16T14:05:24.000Z","size":32,"stargazers_count":5,"open_issues_count":0,"forks_count":2,"subscribers_count":1,"default_branch":"main","last_synced_at":"2024-11-28T15:11:57.425Z","etag":null,"topics":["c","caser-cipher-algorithm","columnar-transposition-cipher","encryption-decryption","hill-cipher-algorithm","vigenere-cipher-algorithm"],"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/utsavpatel562.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":"2024-02-26T20:16:34.000Z","updated_at":"2024-06-17T16:32:03.000Z","dependencies_parsed_at":"2024-04-16T14:59:04.671Z","dependency_job_id":null,"html_url":"https://github.com/utsavpatel562/Computer-Network-and-Security-","commit_stats":null,"previous_names":["utsavpatel562/computer-network-and-security-"],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/utsavpatel562%2FComputer-Network-and-Security-","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/utsavpatel562%2FComputer-Network-and-Security-/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/utsavpatel562%2FComputer-Network-and-Security-/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/utsavpatel562%2FComputer-Network-and-Security-/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/utsavpatel562","download_url":"https://codeload.github.com/utsavpatel562/Computer-Network-and-Security-/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":235813531,"owners_count":19048987,"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":["c","caser-cipher-algorithm","columnar-transposition-cipher","encryption-decryption","hill-cipher-algorithm","vigenere-cipher-algorithm"],"created_at":"2024-11-28T15:11:40.568Z","updated_at":"2025-10-09T10:32:11.119Z","avatar_url":"https://github.com/utsavpatel562.png","language":"C","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Computer-Network-and-Security\n\n\u003ch2\u003e\u003cb\u003eEncryption and Decryption Algorithms in C\u003c/b\u003e\u003c/h2\u003e\n\nThis repository contains C implementations of various encryption and decryption algorithms, including Hill Cipher, Columnar Transposition, Vigenère Cipher, and Caesar Cipher.\n\n\u003ch2\u003e\u003cb\u003eTable of Contents\u003c/b\u003e\u003c/h2\u003e\n\u003cul type=\"disc\" style=\"color:#0B8ED9;\"\u003e\n\u003cli style=\"color:#0B8ED9;\"\u003eIntroduction\u003c/li\u003e\n\u003cli style=\"color:#0B8ED9;\"\u003eAlgorithms Implemented\u003c/li\u003e\n\u003cli style=\"color:#0B8ED9;\"\u003eUsage\u003c/li\u003e\n\u003cli style=\"color:#0B8ED9;\"\u003eContributing\u003c/li\u003e\n\u003cli style=\"color:#0B8ED9;\"\u003eLicense\u003c/li\u003e\n\u003c/ul\u003e\n\u003ch2\u003e\u003cb\u003eIntroduction\u003c/b\u003e\u003c/h2\u003e\nEncryption is the process of converting plaintext into ciphertext to secure it from unauthorized access. Decryption is the reverse process of converting ciphertext back into plaintext. This repository provides implementations of popular encryption and decryption algorithms in C language.\n\n\u003ch2\u003e\u003cb\u003eAlgorithms Implemented\u003c/b\u003e\u003c/h2\u003e\n\u003cul type=\"decimal\"\u003e\n\n\u003cli\u003e\u003cb\u003eHill Cipher:\u003c/b\u003e A polygraphic substitution cipher based on linear algebra. It operates on blocks of plaintext letters and uses matrix multiplication for encryption and decryption.\u003c/li\u003e\n\n\u003cli\u003e\u003cb\u003eColumnar Transposition:\u003c/b\u003e A simple transposition cipher where the plaintext is reordered according to a specified columnar arrangement. The key determines the order of the columns.\u003c/li\u003e\n\n\u003cli\u003e\u003cb\u003eVigenère Cipher:\u003c/b\u003e A method of encrypting alphabetic text by using a simple form of polyalphabetic substitution. It uses a keyword to shift each letter of the plaintext by different amounts.\u003c/li\u003e\n\n\u003cli\u003e\u003cb\u003eCaesar Cipher:\u003c/b\u003e One of the simplest and most widely known encryption techniques. It shifts each letter of the plaintext by a fixed number of positions in the alphabet.\u003c/li\u003e\n\u003c/ul\u003e\n\n\u003ch2\u003e\u003cb\u003eLicense\u003c/b\u003e\u003c/h2\u003e\nThis project is licensed under the MIT License - see the LICENSE file for details.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Futsavpatel562%2Fcomputer-network-and-security-","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Futsavpatel562%2Fcomputer-network-and-security-","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Futsavpatel562%2Fcomputer-network-and-security-/lists"}