Asymmetric encryption provides confidentiality by using two separate keys: a public key and a private key.
Here’s how it works:
- Public Key: This key is shared openly and can be used by anyone to encrypt a message intended for the owner of the corresponding private key.
- Private Key: This key is kept secret by the owner and is used to decrypt the messages that were encrypted with the corresponding public key.
The process ensures confidentiality because:
- When someone sends a message, they encrypt it using the recipient’s public key.
- Only the recipient’s private key can decrypt the message, making it unreadable to anyone else, even if they have access to the encrypted data.
Thus, only the intended recipient, who possesses the private key, can decrypt and read the message, ensuring that it remains confidential.