Authentication method and apparatus for satellite navigation message and correction messages
AssigneeElectronics and Telecommunications Research Institute
InventorsWon Chan Jung, Taenam Cho, Seunglim Yong
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Abstract
A satellite navigation system-based authentication method includes receiving a first message, receiving a second message which includes first authentication information and second authentication information via channel which is differ from channel where the first message is transmitted, authenticating the first message by using the first authentication information; and authenticating the second message by using the second authentication information.
Claims8
A satellite navigation system-based authentication method, the method comprising:
- receiving a first message;
- receiving a second message which includes first authentication information and second authentication information via a channel which is different from a channel where the first message is transmitted;
- authenticating the first message by using the first authentication information;
- and
- authenticating the second message by using the second authentication information;
- wherein the first message comprises a navigation message transmitted at a low speed, and the second message comprises a centimeter-level service message transmitted at a high speed,
- wherein a subframe of the first message comprises a field for synchronizing the second message with the subframe, and
- a subframe of the second message comprises a data part comprising the first authentication information and the second authentication information, and
- wherein an odd-numbered subframe of subframes comprised by the second message comprises authentication information on the odd-numbered subframe, and
- an even-numbered subframe of the subframes comprised by the second message comprises a concatenation of authentication information on a subframe corresponding to an even-numbered subframe of the subframes comprised by the first message and authentication information on the even-numbered subframe.
An apparatus configured to perform a satellite navigation system-based authentication method, the apparatus comprising:
- a memory comprising instructions;
- and
- a processor electrically connected to the memory and configured to execute the instructions, wherein the processor performs a plurality of operations when the instructions are executed by the processor, and
- the operations comprise:
- receiving a first message;
- receiving a second message which includes first authentication information and second authentication information via a channel which is different from a channel where the first message is transmitted;
- authenticating the first message by using the first authentication information;
- and
- authenticating the second message by using the second authentication information;
- wherein the first message comprises a navigation message transmitted at a low speed, and the second message comprises a centimeter-level service message transmitted at a high speed,
- wherein a subframe of the first message comprises a field for synchronizing the second message with the subframe, and
- a subframe of the second message comprises a data part comprising the first authentication information and the second authentication information, and
- wherein an odd-numbered subframe of subframes comprised by the second message comprises authentication information on the odd-numbered subframe, and
- an even-numbered subframe of the subframes comprised by the second message comprises a concatenation of authentication information on a subframe corresponding to an even-numbered subframe of the subframes comprised by the first message and authentication information on the even-numbered subframe.
Dependencies are inferred from the claim text.