Public/Private key encryption is asymmetric, meaning anything encrypted with one key must be decrypted using the opposite key. If the data was encrypted with the public key, only the private key can decrypt it.
Public-key cryptography, or asymmetric cryptography, is any cryptographic system that uses pairs of keys: public keys which may be disseminated widely, and private keys which are known only to the owner. This accomplishes two functions: authentication, where the public key verifies that a holder of the paired private key sent the message, and encryption, where only the paired private key holder can decrypt the message encrypted with the public key.
In a public key encryption …