Abstract: The present disclosure provides a system and method for certifying the delivery of electronic mail messages. In one embodiment, the sender contacts a proof-of-delivery-request creation server which receives the message the sender would like to obtain a proof-of-delivery for, generates a processed message and a proof-of-delivery-request, and returns both to the sender. The sender then uses his regular email infrastructure to transmit to the recipient the processed message and the proof-of-delivery-request as a single email. Upon receiving the sender's email, the recipient contacts a proof-of-delivery-request processing server operated by a trusted-third-party and sends it the proof-of-delivery-request. Said server processes the proof-of-delivery-request, notifies the sender that the recipient has received the message and provides the recipient with information usable for extracting the original message from the processed message.

Abstract: The present disclosure provides a system and method for end-to-end electronic mail encryption. In one embodiment, the sender contacts a payload-encryption-packet creation server which receives the message the sender would like to encrypt, generates an encrypted message and a payload-encryption-packet, and returns both to the sender. The sender then uses his regular email infrastructure to transmit to the recipient the encrypted message and the payload-encryption-packet as a single email. Upon receiving the sender's email, the recipient contacts a payload-encryption-packet processing server and sends it the payload-encryption-packet and authorization information. Depending on the validity of the authorization information, said server processes the payload-encryption-packet and provides the recipient with information usable for extracting the original message from the encrypted message.

Abstract: The present disclosure provides a system and method for ad-hoc processing of cryptographically-encoded data. In one embodiment, a recipient receives a cryptographically-encoded email and proceeds to contact a processing server to decrypt said cryptographically-encoded email. The recipient may interact with the server either by copying-and-pasting the content of the cryptographically-encoded email to a web interface provided by the processing server or by forwarding it to the processing server using his existing email software. In the case of the forward, the processing server sends yet another email back to the recipient containing a URL to a web interface for continuing to interact with the processing server in order to decrypt the cryptographically-encoded email. Through its web interface, the processing server guides the recipient through the steps required to view a decrypted version of the cryptographically-encoded email.

Abstract: The present invention provides a method and system for warranting electronic mail using a hybrid public key encryption scheme. In one embodiment, the sender contacts an authentication server which first identifies the sender as being allowed to send through the server, and secondly signs his email using a private key in order to send to the recipient. Upon receipt, the recipient can then verify that the sender is indeed authenticated by the authentication server by contacting the authentication server, requesting the sender's public key and using this public key to validate the signature contained in the email. It is possible that the authentication server may itself send the email to the existing mail servers, or it may simply return the signature to the sender for sending to the recipient along with the original email using the sender's existing outgoing email server.