How does SecureDolphin work?

SecureDolphin combines symmetric-key encryption and public-key encryption. E-mail messages are encrypted using a symmetric encryption algorithm, which requires a symmetric key. Each symmetric key is used only once. The encrypted message is sent to the receiver along with the one-time symmetric key. In order to protect the symmetrics key during transmission, it is encrypted with the receiver's public key. Only the private key belonging to the receiver can decrypt the symmetric key. Given that the message is encrypted with the symmetric key, only the intended recipient of the message, who has the private key, can decrypt and read the E-mail