Security over a network
First Claim
1. A method of preparing second protocol data for transmitting over a first protocol network comprising the steps of:
- compressing the data to be transmitted in accordance with the first protocol, to produce first protocol compressed data; and
encrypting the first protocol compressed data in accordance with the first protocol to produce first protocol compressed and encrypted data;
wherein the method further comprises transmitting the second protocol data from a first end terminal supporting a second protocol to a second end terminal supporting a second protocol via the first protocol network.
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Accused Products
Abstract
According to one aspect of the present invention there is provided a method of preparing second protocol data for transmitting over a first protocol network comprising the steps of compressing the data to be transmitted in accordance with the first protocol, to produced first protocol compressed data and encrypting the first protocol compressed data in accordance with the first protocol to produce first protocol compressed and encrypted data. The invention consists of a means for the client to indicate to the first hop proxy that it wishes S/MIME encryption to be applied to part of an outgoing message. The first hop proxy then applies this encryption on behalf of the client. The encryption is therefore applied after the message has traversed the end terminal link. On the first proxy link, the message is sent without S/MIME encryption and can therefore benefit from compression (before the first hop IPSEC encryption is applied). A second aspect of the invention allows the support of end-to-end compression to be negotiated between end devices so that SIP compression can be applied to data before it is encrypted using S/MIME by the end system.
31 Citations
26 Claims
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1. A method of preparing second protocol data for transmitting over a first protocol network comprising the steps of:
- compressing the data to be transmitted in accordance with the first protocol, to produce first protocol compressed data; and
encrypting the first protocol compressed data in accordance with the first protocol to produce first protocol compressed and encrypted data;
wherein the method further comprises transmitting the second protocol data from a first end terminal supporting a second protocol to a second end terminal supporting a second protocol via the first protocol network. - View Dependent Claims (2, 3, 4, 5, 6)
- compressing the data to be transmitted in accordance with the first protocol, to produce first protocol compressed data; and
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7. A method of transmitting second protocol data over a first protocol network comprising the steps of:
- compressing the data to be transmitted in accordance with the first protocol, to produce first protocol compressed data;
encrypting the first protocol compressed data in accordance with the first protocol to produce first protocol compressed and encrypted data; and
transmitting the second protocol data from a first end terminal supporting a second protocol to a second end terminal supporting a second protocol over the first protocol network. - View Dependent Claims (8, 9, 10)
- compressing the data to be transmitted in accordance with the first protocol, to produce first protocol compressed data;
- 11. A method of receiving second protocol data which has been compressed and encrypted in accordance with a first protocol and which has been transmitted over a first protocol network comprising the steps of decrypting the first protocol compressed data in accordance with the first protocol and decompressing the data to be transmitted in accordance with the first protocol.
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16. Apparatus for preparing second protocol data for transmission over a first protocol network comprising:
- a compressor for compressing the data to be transmitted in accordance with the first protocol, to produce first protocol compressed data; and
an encryptor for encrypting the first protocol compressed data in accordance with the first protocol to produce first protocol compressed and encrypted data;
wherein the apparatus is configured to transmit the second protocol data from a first end terminal supporting a second protocol to a second end terminal supporting a second protocol via the first protocol network. - View Dependent Claims (17, 18, 19)
- a compressor for compressing the data to be transmitted in accordance with the first protocol, to produce first protocol compressed data; and
- 20. Apparatus for receiving second protocol data which has been compressed and encrypted in accordance with a first protocol and which has been transmitted over a first protocol network, the apparatus being configured to decrypt the first protocol compressed data in accordance with the first protocol and decompress the data received in accordance with the first protocol, wherein the apparatus is further configured to receive the data from a first end terminal supporting a second protocol at a second end terminal supporting a second protocol via the first protocol network.
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24. A system for transmitting data of a second protocol type over a first protocol type network, where in the system includes first and second end terminals which support the second protocol data, first and second proxy intermediate the respective end terminals and the network and a network supporting a first protocol and where in data is transmitted from the first terminal to the second terminal via the proxies and the network and wherein the data is firstly compressed and secondly encrypted in accordance with the first protocol before being transmitted on the network.
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25. A program for a computer in a machine readable form having code portion arranged to perform the steps of preparing second protocol data for transmitting over a first protocol network comprising the steps of:
- compressing the data to be transmitted in accordance with the first protocol, to produce first protocol compressed data; and
encrypting the first protocol compressed data in accordance with the first protocol to produce first protocol compressed and encrypted data;
wherein the method further comprises transmitting the second protocol data from a first end terminal supporting a second protocol to a second end terminal supporting a second protocol via the first protocol network.
- compressing the data to be transmitted in accordance with the first protocol, to produce first protocol compressed data; and
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26. A program for a computer in a machine readable form having code portion arranged to perform the steps of transmitting second protocol data over a first protocol network comprising the steps of:
- compressing the data to be transmitted in accordance with the first protocol, to produce first protocol compressed data;
encrypting the first protocol compressed data in accordance with the first protocol to produce first protocol compressed and encrypted data; and
transmitting the second protocol data from a first end terminal supporting a second protocol to a second end terminal supporting a second Protocol over the first protocol network.
- compressing the data to be transmitted in accordance with the first protocol, to produce first protocol compressed data;
Specification