WO2008146332A1 - 画像暗号化装置、画像復号装置、方法、及びプログラム - Google Patents

画像暗号化装置、画像復号装置、方法、及びプログラム Download PDF

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Publication number
WO2008146332A1
WO2008146332A1 PCT/JP2007/000581 JP2007000581W WO2008146332A1 WO 2008146332 A1 WO2008146332 A1 WO 2008146332A1 JP 2007000581 W JP2007000581 W JP 2007000581W WO 2008146332 A1 WO2008146332 A1 WO 2008146332A1
Authority
WO
WIPO (PCT)
Prior art keywords
image
encrypted
key
encrypting
decrypting
Prior art date
Application number
PCT/JP2007/000581
Other languages
English (en)
French (fr)
Inventor
Kensuke Kuraki
Shohei Nakagata
Original Assignee
Fujitsu Limited
Anan, Taizo
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Limited, Anan, Taizo filed Critical Fujitsu Limited
Priority to JP2009516075A priority Critical patent/JP5018880B2/ja
Priority to PCT/JP2007/000581 priority patent/WO2008146332A1/ja
Priority to CN200780053113A priority patent/CN101682503A/zh
Priority to EP07737237A priority patent/EP2154815A4/en
Priority to KR1020097025550A priority patent/KR101059302B1/ko
Publication of WO2008146332A1 publication Critical patent/WO2008146332A1/ja
Priority to US12/623,935 priority patent/US8571212B2/en

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
    • G09C5/00—Ciphering apparatus or methods not provided for in the preceding groups, e.g. involving the concealment or deformation of graphic data such as designs, written or printed messages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/606—Protecting data by securing the transmission between two devices or processes
    • G06F21/608—Secure printing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
    • G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
    • G06F21/6245—Protecting personal data, e.g. for financial or medical purposes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/0825—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/14—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using a plurality of keys or algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/44—Secrecy systems
    • H04N1/448—Rendering the image unintelligible, e.g. scrambling
    • H04N1/4486—Rendering the image unintelligible, e.g. scrambling using digital data encryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/88—Medical equipments

Abstract

　本発明の画像暗号化装置は、入力画像の指定された領域の画像に対して、暗号鍵による変換、その暗号鍵を送付先の秘密鍵と対になる公開鍵を用いて暗号化した情報の埋め込み、及び画素値変換を順に施し、最終的な暗号化画像を生成する。そして、該暗号化画像を印刷物またはネットワークを介して送付先に送る。本発明の画像復号装置は、印刷データまたは電子データの形式の前記暗号化画像を画像に変換して入力する。そして、その画像データに変換された暗号化画像の暗号化領域に対して、前記本発明の画像暗号化装置の処理と逆の処理を施して、該暗号化領域の画像から復号鍵（前記暗号鍵）を取り出す。そして、その復号鍵を用いて、該暗号化領域の原画像を復号し、前記暗号化画像全体を復元する。
PCT/JP2007/000581 2007-05-30 2007-05-30 画像暗号化装置、画像復号装置、方法、及びプログラム WO2008146332A1 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2009516075A JP5018880B2 (ja) 2007-05-30 2007-05-30 画像暗号化装置、画像復号装置、方法、及びプログラム
PCT/JP2007/000581 WO2008146332A1 (ja) 2007-05-30 2007-05-30 画像暗号化装置、画像復号装置、方法、及びプログラム
CN200780053113A CN101682503A (zh) 2007-05-30 2007-05-30 图像加密装置、图像解密装置、方法以及程序
EP07737237A EP2154815A4 (en) 2007-05-30 2007-05-30 IMAGE ENCRYPTION DEVICE, IMAGE KEYING DEVICE, METHOD AND PROGRAM
KR1020097025550A KR101059302B1 (ko) 2007-05-30 2007-05-30 화상 암호화 장치, 화상 암호화 방법, 및 기록 매체
US12/623,935 US8571212B2 (en) 2007-05-30 2009-11-23 Image encrypting device, image decrypting device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/000581 WO2008146332A1 (ja) 2007-05-30 2007-05-30 画像暗号化装置、画像復号装置、方法、及びプログラム

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/623,935 Continuation US8571212B2 (en) 2007-05-30 2009-11-23 Image encrypting device, image decrypting device and method

Publications (1)

Publication Number Publication Date
WO2008146332A1 true WO2008146332A1 (ja) 2008-12-04

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Application Number Title Priority Date Filing Date
PCT/JP2007/000581 WO2008146332A1 (ja) 2007-05-30 2007-05-30 画像暗号化装置、画像復号装置、方法、及びプログラム

Country Status (6)

Country Link
US (1) US8571212B2 (ja)
EP (1) EP2154815A4 (ja)
JP (1) JP5018880B2 (ja)
KR (1) KR101059302B1 (ja)
CN (1) CN101682503A (ja)
WO (1) WO2008146332A1 (ja)

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US8571212B2 (en) 2013-10-29
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