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openssl-genrsa:tldr:03797
The command "openssl genrsa" is used to generate an RSA private key.
RSA (Rivest-Shamir-Adleman) is a widely-used encryption algorithm that is used to secure communication and data transmission.
The "genrsa" command is part of the OpenSSL toolkit, which is a powerful open-source software library for cryptographic functions, including SSL/TLS protocol implementation.
When you run the "openssl genrsa" command, it creates a new RSA private key with the default key size of 2048 bits. This private key can be used for various cryptographic operations, such as generating a public key, encrypting or decrypting data, or signing digital signatures.
Here's an example of how to use the command:
openssl genrsa -out private.key 2048
In this example, the command generates an RSA private key with a key size of 2048 bits and saves it in a file named "private.key". The private key will be in PEM (Privacy Enhanced Mail) format, which is a common file format for storing cryptographic keys and certificates.
It's important to keep the generated private key secure and protected since it is used to decrypt or sign sensitive data.