Abstract: Encryption of message content of an e-mail sent by way of a webmail service may be performed in response to activation of a user interface element. The message content may be encrypted using a symmetric key. A public key of a recipient of the e-mail is received from a backend service and employed to encrypt the symmetric key. The encrypted symmetric key and encrypted message content are sent to a recipient by way of the webmail service. Decryption of the encrypted message content may be performed in response to activation of another user interface element. A private key of the recipient is received from the backend service and employed to decrypt the encrypted symmetric key. The symmetric key is thereafter employed to decrypt the encrypted message content.

Abstract: A person-to-person secure file transfer system includes an originating computer that receives a public key of a recipient from a cloud computing system. The originating computer encrypts a file using a message key, and encrypts the message key using the public key of the recipient. The encrypted file is stored in the cloud computing system. In response to a request from a receiving computer, the cloud computing system decrypts the encrypted message key using a private key of the recipient, decrypts the encrypted file using the message key, and provides the now decrypted file to the receiving computer. In another example, the cloud computing system provides the private key of the recipient and the encrypted file to the receiving computer, which decrypts the encrypted message key using the private key of the recipient and decrypts the encrypted file using the message key.