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OpenSSL: TLS/SSL and Cryptography Library
OpenSSL is a robust, commercial-grade, full-featured Open Source Toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols and a powerful general-purpose cryptography library.
C
Added on 2025年7月6日27,894
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LanguageProject Introduction
Summary
OpenSSL is a fundamental library providing the essential cryptographic building blocks and protocols required for secure data transmission and storage. It is widely used across the internet and various software applications.
Problem Solved
Provides a standardized and open-source implementation for securing network communications and performing cryptographic operations, addressing the need for privacy, integrity, and authenticity in digital interactions.
Core Features
TLS/SSL Protocols
Implements TLS and SSL protocols for secure network communication.
Cryptography Library
Provides a wide range of cryptographic algorithms (encryption, hashing, digital signatures).
Certificate Management
Includes tools for managing digital certificates, keys, and certificate authorities (CAs).
APIs and Command-Line Tools
Offers command-line utilities and APIs for developers to integrate cryptographic functions into applications.
Tech Stack
C
C++
Assembly
Perl (for build scripts)
Use Cases
OpenSSL is a foundational component in countless applications and systems requiring secure communication and data protection.
Securing Web Servers (HTTPS)
Details
Securing websites by enabling HTTPS. Web servers like Apache and Nginx heavily rely on OpenSSL for TLS/SSL.
User Value
Ensures encrypted communication between web servers and clients, protecting user data.
Secure Email Communication
Details
Used in email servers (SMTP, POP3, IMAP) to secure email transmission and retrieval via STARTTLS or SMTPS/POP3S/IMAPS.
User Value
Protects the privacy and integrity of email content during transit.
Implementing VPNs
Details
Underpins many VPN solutions (like OpenVPN) to establish encrypted tunnels for secure remote access.
User Value
Creates secure connections for users accessing private networks remotely.
Building Secure Client Applications
Details
Used by client applications (browsers, email clients, command-line tools like `curl` and `wget`) to securely connect to servers.
User Value
Enables applications to trust and communicate securely with remote services.
General Cryptographic Operations
Details
Performing cryptographic operations like hashing, encryption, and digital signatures within applications.
User Value
Adds essential security functions to applications, like password hashing or data encryption.
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