This is your SSH key pair. They are saved in plain text. In public key cryptography, there is both a “private” and “public” key. As their labels suggest, you want to keep the private key in a safe ...

An encryption method for transmitting data that uses key pairs, comprising one private and one public key. Public key cryptography is called "asymmetric encryption" because both keys are not equal.

OpenSSH is an open-source version of the Secure Shell (SSH) protocol ... the time and resources required to crack current public key encryption algorithms such as RSA and elliptic curve.