Title:
COMMUNICATION DATA ENCRYPTION/DECRYPTION METHOD AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/030117
Kind Code:
A1
Abstract:
The objective of the present invention is to reduce operating costs on a device side having poor computer resources, while maintaining security.
In the present invention, an encryption device comprises: an exclusive OR computing unit which executes an exclusive OR computation between plaintext and a first keystream to generate first encrypted text; an error correcting coding unit which subjects the first encrypted text to error correction coding to generate second encrypted text; and a decimator which subjects the second encrypted text to decimation using a second keystream to generate third encrypted text; and a decryption device comprises: an error correcting decoding unit which subjects the third encrypted text to error correcting decoding using the second keystream to generate fourth encrypted text; and an exclusive OR computing unit which executes an exclusive OR computation between the fourth encrypted text and the first keystream and outputs plaintext.
Inventors:
MATSUURA KANTA (JP)
MIHALJEVIC MIODRAG (JP)
MIHALJEVIC MIODRAG (JP)
Application Number:
PCT/JP2016/073907
Publication Date:
February 23, 2017
Filing Date:
August 16, 2016
Export Citation:
Assignee:
UNIV TOKYO (JP)
International Classes:
H04L9/14; H04L9/18
Foreign References:
| US20030012372A1 | 2003-01-16 |
Other References:
MIODRAG J. MIHALJEVIC ET AL.: "Evaluation of an Approach for Security Enhancement of Certain Lightweight Stream Ciphers", 2015 NEN SYMPOSIUM ON CRYPTOGRAPHY AND INFORMATION SECURITY SCIS, vol. 2E1- 5, 2015, pages 1 - 8, [retrieved on 20150120]
Attorney, Agent or Firm:
INABA, Shigeru (JP)
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