Method, apparatus and device for enciphering messages transmitted between interconnected networks
First Claim
1. A method for enciphering messages transmitted via at least one highway interconnecting at least two networks using an Internet protocol as a network layer protocol and one of a TCP or UDP protocol as a transport layer protocol and the highway using the Internet protocol as a network layer protocol to transmit the messages having a plurality of headers including an Internet header and one of a TCP or a UDP header and data comprising:
- transmitting the messages via the highway with at least a part of one of the TCP or UDP header and the data being enciphered at the same time; and
transmitting the Internet header with the messages without enciphering on the highway.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of enciphering messages transmitted between at least two networks (2, 17) interconnected via at least one highway (8), the interconnected networks (2, 17) using the Internet protocol (IP, as network layer protocol and the TCP or UDP protocol, as transport layer protocol, the highway (8) using a specified network layer protocol, each message comprising a plurality of headers (73-76), including an IP header (75) and a TCP or UDP header (76, 80, 81), and data (77). The specified network layer protocol of the highway is the Internet protocol (IP). For each of the messages, at least a part (82, 83, 84, 85) of the TCP or UDP header (76, 80, 81) is enciphered at the same time as the data (77) and the IP header (75) is plain (non enciphered) to enable the transmission of the message by the highway according to the Internet protocol (IP).
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Citations
12 Claims
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1. A method for enciphering messages transmitted via at least one highway interconnecting at least two networks using an Internet protocol as a network layer protocol and one of a TCP or UDP protocol as a transport layer protocol and the highway using the Internet protocol as a network layer protocol to transmit the messages having a plurality of headers including an Internet header and one of a TCP or a UDP header and data comprising:
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transmitting the messages via the highway with at least a part of one of the TCP or UDP header and the data being enciphered at the same time; and transmitting the Internet header with the messages without enciphering on the highway. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An interface apparatus connected between a highway and one of a network or an item of equipment, the highway using a specified network layer protocol, and permitting a transmission of messages via the highway between one of the network or the item of equipment to which the interface apparatus is connected and another one of the network or the item of equipment to which another interface apparatus is connected, each of the messages containing a plurality of headers including an Internet header and one of a TCP or UDP header and data comprising:
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means for reading a memory card; means for enciphering, for each of the messages, the data and at least a part of one of the TCP or UDP header to obtain enciphered data and an enciphered part of one of the TCP or UDP header and with the Internet header not being enciphered; means for transferring an enciphered message comprising the Internet header, the enciphered data and the enciphered part of one of the TCP or UDP header, for routing of the enciphered message via the highway; and means for identifying one of the networks or items of equipment associated with the interface apparatus. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification