OpenSSL is a cryptographic toolkit that implements the Secure Sockets Layer (SSL v2 / v3) and Transport Layer Security (TLS v1) network protocols and their corresponding cryptography standards.
The OpenSSL program is a command-line tool for using various cryptographic functions of the OpenSSL cryptographic library in the console.
Main features: 1) Create and manage private keys, public keys, and parameters. 2) Public Key Cryptographic Operations 3) Create X.509, CSR, and CRL certificates 4) Message Digest Calculation 5) Encryption and decryption using ciphers 6) Client / Server SSL / TLS Tests 7) S / MIME signed or encrypted mail processing 8) Timestamp requests, generation, and validation
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