{"id":20356564,"url":"https://github.com/madhurimarawat/cryptography-and-network-security","last_synced_at":"2026-05-30T18:31:29.924Z","repository":{"id":195806988,"uuid":"693715861","full_name":"madhurimarawat/Cryptography-and-Network-Security","owner":"madhurimarawat","description":"This repository contains Cryptography programs in the Python programming language.","archived":false,"fork":false,"pushed_at":"2024-01-21T12:03:38.000Z","size":6,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"main","last_synced_at":"2025-03-04T17:43:38.567Z","etag":null,"topics":["caesar-cipher-algorithm","python","rail-fence-cipher"],"latest_commit_sha":null,"homepage":"","language":"Python","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/madhurimarawat.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}},"created_at":"2023-09-19T15:09:17.000Z","updated_at":"2024-01-21T12:00:21.000Z","dependencies_parsed_at":null,"dependency_job_id":"56eb58b6-44c3-4771-8b90-9d406211e36a","html_url":"https://github.com/madhurimarawat/Cryptography-and-Network-Security","commit_stats":null,"previous_names":["madhurimarawat/cryptography-and-network-security"],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/madhurimarawat/Cryptography-and-Network-Security","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/madhurimarawat%2FCryptography-and-Network-Security","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/madhurimarawat%2FCryptography-and-Network-Security/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/madhurimarawat%2FCryptography-and-Network-Security/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/madhurimarawat%2FCryptography-and-Network-Security/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/madhurimarawat","download_url":"https://codeload.github.com/madhurimarawat/Cryptography-and-Network-Security/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/madhurimarawat%2FCryptography-and-Network-Security/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":33705207,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-26T15:22:16.424Z","status":"online","status_checked_at":"2026-05-30T02:00:06.278Z","response_time":92,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"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":["caesar-cipher-algorithm","python","rail-fence-cipher"],"created_at":"2024-11-14T23:17:02.868Z","updated_at":"2026-05-30T18:31:29.908Z","avatar_url":"https://github.com/madhurimarawat.png","language":"Python","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Cryptography-and-Network-Security\nThis repository contains Cryptography programs in the Python programming language.\n\n## Cryptography:\n\n- **Definition:**\n  - Cryptography is the practice and study of techniques for securing communication and information from adversaries.\n\n- **Objectives:**\n  - Ensure confidentiality, integrity, and authenticity of information.\n  - Provide secure communication in the presence of malicious third parties.\n\n- **Types of Cryptography:**\n  - Symmetric Key Cryptography (uses a single key for both encryption and decryption).\n  - Asymmetric Key Cryptography (uses a pair of public and private keys).\n\n- **Applications:**\n  - Used in securing online transactions (e.g., HTTPS).\n  - Protects sensitive data in storage and transmission.\n\n- **Challenges:**\n  - Continuous need for stronger algorithms due to advancements in computing power.\n  - Balancing security and usability in real-world applications.\n\n### Caesar Cipher:\n\n- **Algorithm:**\n  - Substitution cipher where each letter in the plaintext is shifted a certain number of places down or up the alphabet.\n\n- **Key Concept:**\n  - Key represents the number of positions each letter of the alphabet is shifted.\n\n- **Weakness:**\n  - Vulnerable to brute-force attacks due to a limited number of possible keys (26 in the case of the English alphabet).\n\n- **Encryption Example:**\n  - Plain text: \"HELLO\"\n  - Key: 3\n  - Cipher text: \"KHOOR\"\n\n- **History:**\n  - Named after Julius Caesar, who is believed to have used it for military communication.\n\n### Rail Fence Cipher:\n\n- **Algorithm:**\n  - Transposition cipher where the plaintext is written in a zigzag pattern on a set of rails.\n\n- **Key Concept:**\n  - Key represents the number of rails (rows) used in the encryption process.\n\n- **Encryption Example:**\n  - Plain text: \"HELLO\"\n  - Key: 3\n  - Cipher text: \"HOLELW\"\n\n- **Decryption:**\n  - Reconstruct the zigzag pattern and read off the message.\n\n- **Usage:**\n  - Historical use in non-secure communication due to its simplicity.\n  - Rarely used for serious encryption today, more of a puzzle or educational tool.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmadhurimarawat%2Fcryptography-and-network-security","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmadhurimarawat%2Fcryptography-and-network-security","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmadhurimarawat%2Fcryptography-and-network-security/lists"}