Method and system for anonymous operation of a mobile node
First Claim
1. A method for a mobile node having a public mobile node identifier, said method comprising:
- said mobile node receiving, from a home system, coding information that enables said mobile node to subsequently generate time-based codes that are valid for predetermined time periods using a coding algorithm;
after receiving said coding information, said mobile node using said coding algorithm to generate a current time-based code; and
said mobile node transmitting, to a serving system, authentication information in which said mobile node is identified by a coded mobile node identifier instead of said public mobile node identifier, wherein said coded mobile node identifier includes said current time-based code, and wherein said authentication information includes a timestamp that indicates a time for which said current time-based code is valid.
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Accused Products
Abstract
A mobile node and its home system generate synchronized time-based codes at periodic time intervals. Each time-based code is valid for a predetermined time period. To facilitate anonymous operation when roaming, the mobile node identifies itself with a coded identifier instead of a public identifier. The coded identifier used at a given time includes the time-based code that is valid for that given time. To authenticate the mobile node, a serving system receives authentication information from the mobile node and forwards the authentication information to a home system. The authentication information includes the current time-based code and a timestamp. The home system identifies the mobile node from the current time-based code and the timestamp. The home system then uses the authentication information to authenticate the mobile node.
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Citations
20 Claims
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1. A method for a mobile node having a public mobile node identifier, said method comprising:
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said mobile node receiving, from a home system, coding information that enables said mobile node to subsequently generate time-based codes that are valid for predetermined time periods using a coding algorithm; after receiving said coding information, said mobile node using said coding algorithm to generate a current time-based code; and said mobile node transmitting, to a serving system, authentication information in which said mobile node is identified by a coded mobile node identifier instead of said public mobile node identifier, wherein said coded mobile node identifier includes said current time-based code, and wherein said authentication information includes a timestamp that indicates a time for which said current time-based code is valid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A mobile node having a public mobile node identifier, wherein said mobile node is configured to:
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(a) receive coding information that enables said mobile node to subsequently generate time-based codes that are valid for predetermined time periods using a coding algorithm; (b) use said coding algorithm to generate a current time-based code; and (c) transmit authentication information in which said mobile node is identified by a coded mobile node identifier instead of said public mobile node identifier, wherein said coded mobile node identifier includes said current time-based code, and wherein said authentication information includes a timestamp that indicates a time for which said current time-based code is valid. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification