ENCRYPTED COMMUNICATION SYSTEM, ENCRYPTED COMMUNICATION METHOD, SECURITY CHIP, COMMUNICATION DEVICE AND CONTROL METHOD AND CONTROL PROGRAM FOR SAME

Title:

ENCRYPTED COMMUNICATION SYSTEM, ENCRYPTED COMMUNICATION METHOD, SECURITY CHIP, COMMUNICATION DEVICE AND CONTROL METHOD AND CONTROL PROGRAM FOR SAME

Document Type and Number:

WIPO Patent Application WO/2017/154484

Kind Code:

A1

Abstract:

The present invention relates to an encrypted communication system with which confidentiality of communication information is enhanced by preventing leakage of a common key. This encrypted communication system employs a group comprising a first secret portion and a first public portion, and a group comprising a second secret portion and a second public portion, in a Key Predistribution System (KPS), and is provided with: an encrypted text generating unit which, in a first security chip (TMP) of a first communication device, uses the second public portion which has been transmitted from a second communication device constituting a communication partner, to generate a common key by means of the first secret portion held in the first security chip, and which, in the first security chip, generates encrypted text by encrypting plaintext on the basis of the common key; and a decrypting unit which, in a second security chip of the second communication device, uses the first public portion which has been transmitted from the first communication device constituting a communication partner, to generate the common key by means of the second secret portion held in the second security chip, and which, in the second security chip, decrypts the encrypted text, received from the first communication device, on the basis of the common key to generate plaintext.

More Like This:

JP2003338811	COMMUNICATION METHOD, SYSTEM, APPARATUS, AND PROGRAM
WO/2009/080683	METHOD TO TRACE TRACEABLE PARTS OF ORIGINAL PRIVATE KEYS IN A PUBLIC-KEY CRYPTOSYSTEM
JP6925997	Reception method

Inventors:

SATOU MASAYUKI (JP)

Application Number:

PCT/JP2017/005311

Publication Date:

September 14, 2017

Filing Date:

February 14, 2017

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NEC CORP (JP)

International Classes:

H04L9/08; H04L9/10; H04L9/14

Foreign References:

JPH09238132A	1997-09-09
JP2012506658A	2012-03-15
JP2010508576A	2010-03-18
JP2015233201A	2015-12-24
JP2014050038A	2014-03-17
JP2017060031A	2017-03-23

Attorney, Agent or Firm:

KATO Takashi (JP)

Download PDF:

View/Download PDF PDF Help

Previous Patent: OPTICAL COMPONENT STORAGE CASE

Next Patent: PACKAGING BAG AND METHOD FOR USING PACKAGING BAG