Rsa public key encryption using openssl

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rsa (rivest-shamir-adleman) is a public-key cryptosystem widely used for secure data transmission. openssl is a popular open-source library that provides cryptographic functions. in this tutorial, we will cover how to generate rsa public and private keys using openssl, encrypt data with the public key, and decrypt it with the private key.

step 1: generate rsa key pair
first, we need to generate an rsa key pair (public and private keys). you can do this using the following openssl commands:



step 2: encrypt data with public key
now that we have our public and private keys, we can use the public key to encrypt data. in this example, we will encrypt a message stored in a file called `plaintext.txt`:



step 3: decrypt data with private key
to decrypt the encrypted data using the private key, run the following command:



this command will decrypt the data in `encrypted_data.bin` and save the decrypted message in `decrypted_data.txt`.

here is a complete example demonstrating rsa public key encryption and decryption using openssl:



this example covers the basic steps to perform rsa public key encryption and decryption using openssl. remember to protect your private key and securely distribute your public key to parties who need to encrypt data for you.

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