Abstract: A first party (e.g. educational testing service) provides through the internet to a control server information (e.g. test server) relating to a second party (e.g. a student taking tests prepared by the service). The server provides and may store a verification (e.g. an encrypted digital signature) of, but does not store, the second party information. The server transmits the information and the verification through the internet to the second party. The second party transmits to the server through the internet the information and the verification with a request to transmit the information to a designated third party (e.g. a college or university to which the student has applied for admission). The server authenticates the information through verification comparisons (or through comparison of the information with the reconstruction and decryption of the verification) and transmits the information, authenticated by the server and the testing service, to the third party.

Abstract: A server transmits a message from a sender to a recipient. The server receives from the recipient an attachment relating to the message route between the server and the recipient. The server transmits to the sender the message and the attachment and their encrypted digital fingerprints and expunges the transmitted information. To subsequently authenticate the message and the attachment, the sender transmits to the server what the server has previously transmitted to the sender. The server then prepares a digital fingerprint of the message and decrypts the encrypted digital fingerprint of the message and compares these digital fingerprints to authenticate the message. The server performs the same routine with the attachment and the encrypted digital fingerprint of the attachment to authenticate the attachment the recipient replies to the sender's message through the server. The server records proof of the delivery and content of the reply to the sender and the recipient.

Abstract: A sewer provides a message from a sender to a recipient and an attachment including the sender's identity, the recipient's identity and address, and the time of transmission from the sewer to the recipient. The method includes receiving the message and attachment at a sewer displaced from the recipient's location from the recipient and operates upon the message and attachment to allow comparison between information contained in the attachment and/or the message to determine the authenticity of the message.

Abstract: A server receives a message from a sender and transmits the message to a recipient. The server normally transmits the message in a first path to the recipient. When the sender indicates at a particular position in the message that the message is registered, the server transmits the message in a second path to the recipient. The sender can also provide additional indications in the message to have the server handle the message in other special ways not normally provided by the server. After learning from the recipient or the recipient's agent that the message was successfully received, the server creates, and forwards to the sender, an electronic receipt. The receipt includes at least one, and preferably all, of the message and any attachments, a delivery success/failure table listing the receipts, and the receipt times, of the message by the recipient's specific agents, and the failure of other agents of the recipient to receive the message and a an encrypted hash of the message and attachments subsequently.

Abstract: A first party (e.g. educational testing service) provides through the internet to a control server information (e.g. test server) relating to a second party (e.g. a student taking tests prepared by the service). The server provides and may store a verification (e.g. an encrypted digital signature) of, but does not store, the second party information. The server transmits the information and the verification through the internet to the second party. The second party transmits to the server through the internet the information and the verification with a request to transmit the information to a designated third party (e.g. a college or university to which the student has applied for admission). The server authenticates the information through verification comparisons (or through comparison of the information with the reconstruction and decryption of the verification) and transmits the information, authenticated by the server and the testing service, to the third party.

Abstract: A server transmits a message from a sender to a recipient. The server receives from the recipient an attachment relating to the message route between the server and the recipient. The server transmits to the sender the message and the attachment and their encrypted digital fingerprints and expunges the transmitted information. To subsequently authenticate the message and the attachment, the sender transmits to the server what the server has previously transmitted to the sender. The server then prepares a digital fingerprint of the message and decrypts the encrypted digital fingerprint of the message and compares these digital fingerprints to authenticate the message. The server performs the same routine with the attachment and the encrypted digital fingerprint of the attachment to authenticate the attachment the recipient replies to the sender's message through the server. The server records proof of the delivery and content of the reply to the sender and the recipient.

Abstract: A server provides a message from a sender to a recipient and an attachment including the sender's identity, the recipient's identity and address, and the time of transmission from the server to the recipient.

Abstract: A first party (e.g. educational testing service) provides through the internet to a control server information (e.g. test server) relating to a second party (e.g. a student taking tests prepared by the service). The server provides and may store a verification (e.g. an encrypted digital signature) of, but does not store, the second party information. The server transmits the information and the verification through the internet to the second party. The second party transmits to the server through the internet the information and the verification with a request to transmit the information to a designated third party (e.g. a college or university to which the student has applied for admission). The server authenticates the information through verification comparisons (or through comparison of the information with the reconstruction and decryption of the verification) and transmits the information, authenticated by the server and the testing service, to the third party.

Abstract: A server receives a message from a sender and transmits the message through the Internet to a recipient. The server normally transmits the message in a first path through the Internet to the recipient. When the sender indicates at a particular position in the message that the message is registered, the server transmits the message in a second path through the Internet to the recipient. The sender can also provide additional indications in the message to have the server handle the message in other special ways not normally provided by the server. After learning from the receipt or the recipient's agent through the Internet that the message was successfully received, the server creates, and forwards to the sender, an electronic receipt.