COMMUNICATION SYSTEM AND METHOD FOR SECURELY COMMUNICATING A MESSAGE BETWEEN CORRESPONDENTS THROUGH AN INTERMEDIARY TERMINAL
First Claim
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1. A method of communicating a message between correspondents in a communication system through an intermediary terminal, the method comprising:
- said one of said correspondents computing a secure communication including said message, computing a signature component including a derivation of said secure communication and an identifier, and forwarding said signature component and said secure communication to said intermediary terminal without the associated certificate, said intermediary terminal having shared said identifier with one of said correspondents, said intermediary terminal having access to said identifier and an associated certificate of a public key of said one of said correspondents;
said intermediary terminal verifying said signature component, recovering said identifier from said signature component and retrieving the certificate of the public key of said one of said correspondents based on said identifier;
said intermediary terminal attaching to said secure communication said certificate, andsaid intermediary terminal forwarding said secure communication and said certificate to another of said correspondents.
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Abstract
A wireless communication system includes a pager or similar device that communicates to a home terminal. The home terminal confirms the identity of the pager and attaches a certificate to the message for ongoing transmission. Where the recipient is also a pager, an associated home terminal verifies the transmission and forwards it in a trusted manner without the certificate to the recipient.
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Citations
26 Claims
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1. A method of communicating a message between correspondents in a communication system through an intermediary terminal, the method comprising:
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said one of said correspondents computing a secure communication including said message, computing a signature component including a derivation of said secure communication and an identifier, and forwarding said signature component and said secure communication to said intermediary terminal without the associated certificate, said intermediary terminal having shared said identifier with one of said correspondents, said intermediary terminal having access to said identifier and an associated certificate of a public key of said one of said correspondents; said intermediary terminal verifying said signature component, recovering said identifier from said signature component and retrieving the certificate of the public key of said one of said correspondents based on said identifier; said intermediary terminal attaching to said secure communication said certificate, and said intermediary terminal forwarding said secure communication and said certificate to another of said correspondents. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for communicating a message between correspondents, the system comprising:
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an intermediary terminal; and one or more correspondents, wherein said intermediary terminal is configured to share an identifier with one of said correspondents, wherein said intermediary terminal has access to said identifier and an associated certificate of a public key of said one of said correspondents, wherein said one of said correspondents is configured to compute a secure communication including said message; wherein said one of said correspondents is configured to compute a signature component including a derivation of said secure communication and said identifier; wherein said one of said correspondents is configured to forward said signature component and said secure communication to said intermediary terminal without the associated certificate; wherein said intermediary terminal is configured to verify said signature component, recover said identifier from said signature component and retrieve the certificate of the public key of said one of said correspondents based on said identifier; wherein said intermediary terminal is configured to attach to said secure communication said certificate; and wherein said intermediary terminal is configured to forward said secure communication and said certificate to another of said correspondents. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. A method performed by an intermediate terminal for communicating a message between a first and a second correspondent through the intermediary terminal, the method comprising:
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sharing an identifier with the first correspondent and has access to the identifier and an associated certificate of a public key of the first correspondent, wherein the first correspondent is configured to computing a secure communication including the message, compute a signature component including a derivation of the secure communication and the identifier, and forward the signature component and the secure communication to the intermediary terminal without the associated certificate; receiving the signature component and the secure communication from the first correspondent without the associated certificate; verifying the signature component, recovering the identifier from the signature component and retrieving the certificate of the public key of the first correspondent based on the identifier; and attaching to the secure communication the certificate and forwarding the secure communication and the certificate to the second correspondent. - View Dependent Claims (26)
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Specification