# Decode your public and private keyspublic_key=RSA.decode_key"-----BEGIN RSA PUBLIC KEY----- ..."private_key=...# Encrypt a string using the public key and decrypt it using the private keyplaintext="hello world"cyphertext=plaintext|>RSA.encrypt{:public,public_key}# << ... encrypted binary data ... >># Encode it to base64encrypted_b64=:base64.encode_to_stringcyphertext# "... base64 ASCII text ..."# Decode a base64 encrypted string and decrypt itcyphertext=:base64.decodeencrypted_b64plaintext=cyphertext|>RSA.decrypt{:private,private_key}# "hello world"