PGP encryption is a high-grade encryption system used to encrypt content being sent online. It is considered one of the most secure encryption systems available to the public. PGP security requires the receiver to have two keys: a public key and a private key. Asymmetric Key Encryption is the encryption method that uses only one key to encrypt and decrypt data. The public key is given to the sender and the receiver for encryption, and the private key is used to unlock the message.”]
Source: https://hackercombat.com/pgp-encryption-how-strong-is-pgp-security/