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Secret information transmission method, secret information transmission system, and secret information sending device

A technology of secret information and transmission method, applied in the field of secret information transmission device, can solve problems such as time-consuming operation and processing, high-speed communication obstacle, etc.

Inactive Publication Date: 2011-12-07
LAPIS SEMICON CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the method of preparing secret information using a hash function, the calculation process takes time and becomes an obstacle to high-speed communication

Method used

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  • Secret information transmission method, secret information transmission system, and secret information sending device
  • Secret information transmission method, secret information transmission system, and secret information sending device
  • Secret information transmission method, secret information transmission system, and secret information sending device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (Structure of Embodiment 1)

[0040] figure 2 It is a configuration diagram showing the outline of the secret information transmission system in Embodiment 1 of the present invention.

[0041] The secret information transmission system is to carry out digital household electrical appliances (such as television monitors, hereinafter referred to as "TV") using digital correlation technology in household electrical machinery appliances (hereinafter referred to as "household electrical appliances") 10 and to It is a system of wireless communication between remote controllers (hereinafter referred to as "remote control") 20 for remote control.

[0042] The TV 10 is configured to be connected to a communication network 11 such as the Internet, and to be able to transmit and receive information to other information terminals such as a personal computer (hereinafter referred to as "PC"). The TV 10 has a TV main body 12 such as a video receiver, and a communication unit 13 is...

Embodiment 2

[0080] Figure 5 It is a structural diagram showing the outline of the secret information transmission system in Embodiment 2 of the present invention, and represents Embodiment 1 in contrast to figure 2 Elements common to the elements in are marked with the same reference numerals.

[0081] In the secret information transmission system of the present embodiment 2, in the transmission confirming unit 15 on the TV 10 side, when receiving a reception confirmation notification signal (for example, ACK2) from the remote control 20 fails to occur, unlike the embodiment 1, it is not repeated. Send the same scatter information (e.g. r2). According to the second embodiment, in this case, different share r2' is transmitted by random number generation. At this time, by attaching the same (2) to the first serial number, the remote control 20 side can easily recognize that the distributed signals r2, r2' have been retransmitted. Other structures are the same as in Embodiment 1.

[00...

Embodiment 3

[0084] (Structure of Embodiment 3)

[0085] Figure 6 It is a structural diagram showing the outline of the secret information transmission system in Embodiment 3 of the present invention, which corresponds to Embodiment 1 figure 2 Elements common to the elements in are marked with the same reference numerals.

[0086] In the secret information transmission system of the third embodiment, instead of the TV 10 and the remote control 20 of the first embodiment, a TV 10A and a remote control 20A having different structures are provided.

[0087] The TV 10A has the same TV main body 12 as that of the first embodiment, a communication unit 13A different in structure from that of the first embodiment, a shared information generation unit 14A, and a transmission and reception unit 16A. In addition, the remote control 20A has the same remote control main body 21 as in the first embodiment, a transmission and reception unit 25A different in structure from the first embodiment, a com...

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PUM

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Abstract

There is provided a secret data transmission method where a first device generates plural pieces of distributed data including data of a master key and transmits these by wireless communication to a second device and where the second device receives the plural pieces of distributed data and reconstructs the master key, wherein the first device arranges data obtained by performing an EXOR operation in sequence on plural pieces of random number data and the master key to generate secret data, generates a last piece of distributed data by performing an EXOR operation in sequence on the plural pieces of distributed data and the secret data, and transmits the plural pieces of distributed data to the second device, and the second device performs an EXOR operation in sequence on the plural pieces of distributed data to reconstruct the secret data, divides the reconstructed secret data, and performs an EXOR operation on the divided pieces of data to reconstruct the master key.

Description

technical field [0001] The present invention relates to a secret information transmission method, a secret information transmission system, and a secret information transmission device in which information to be kept secret (that is, secret information) including a master key is divided into a plurality of distributed information and transmitted from a sending side to a receiving side, wherein , the master key is the secret key used for encryption etc. Background technique [0002] Conventionally, in order to reduce the possibility of eavesdropping when important information such as an encryption key is transmitted by wireless communication, for example, a method of preparing secret information (Secret data) of a long bit string by using a hash function is known. However, even in the method of preparing secret information using a hash function, calculation processing takes time, which hinders high-speed communication. [0003] Therefore, in order to solve this problem, for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04N21/41H04N21/422H04N21/4367G06F21/60G06F21/62H04N7/16H04N7/167
CPCH04L9/08H04L9/085H04N21/42204H04L2209/80H04N7/163H04N21/4367H04N7/1675H04N21/4126H04W12/0433H04W12/041H04W12/0431H04N21/41265
Inventor 武藤彰英滨井信二
Owner LAPIS SEMICON CO LTD
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