• Title, Summary, Keyword: Digital Signature

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Proposal for Analog Signature Scheme Based on RSA Digital Signature Algorithm and Phase-shifting Digital Holography

  • Gil, Sang Keun
    • Current Optics and Photonics
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    • v.4 no.6
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    • pp.483-499
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    • 2020
  • In this paper, a novel analog signature scheme is proposed by modifying an RSA-based digital signature scheme with optical phase-shifting digital holography. The purpose of the proposed method is generating an analog signature to provide data confidentiality and security during the data transfer, compared to the digital signature. The holographic encryption technique applied to a hash value reveals an analog-type of pseudo-random pattern in the analog signature scheme. The public key and secret key needed to verify the analog signature are computed from public key ciphers which are generated by the same holographic encryption. The proposed analog signature scheme contains a kind of double encryption in the process of generating signature and key, which enhances security level more than the digital signature. The results of performance simulations show the feasibility of the highly secure signature scheme, and security analysis shows high robustness against known-message attacks and chosen-message attacks. In addition, the proposed method can apply to one-time signature schemes which can be used to sign only one message and it can also apply to authentication, e-mails, electronic banking and electronic data interchange.

The Undeniable Digital Multi-signature Scheme Suitable for Joint Copyright Protection on Digital Contents (디지털 콘텐츠 공동 저작권 보호에 적합한 부인봉쇄 디지털 다중서명 기법)

  • Yun Sung-Hyun
    • The Journal of the Korea Contents Association
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    • v.5 no.1
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    • pp.55-63
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    • 2005
  • In undeniable digital signature scheme, the signature can not be verified without the signer's cooperation. The undeniable signature scheme can be used to computerize many applications which can not be done by a conventional digital signature scheme. In this study, we propose the undeniable digital multi-signature scheme which requires many signers and designated verifier The multi-signature can be verified only in cooperation with all signers. The proposed scheme satisfies undeniable property and it is secure against active attacks such as modification and denial of the multi-signature by signers. We also propose copyright protection method of co-authored digital contents as an application of the proposed scheme.

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The undeniable digital multisignature scheme suitable for joint copyright protection on digital contents (온라인 디지털 콘텐츠 공동 저작권 보호에 적합한 부인봉쇄 디지털 다중서명 기법)

  • 윤성현;한군희
    • Proceedings of the Korea Contents Association Conference
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    • pp.261-267
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    • 2004
  • In undeniable digital signature scheme, the signature can not be verified without the signer's cooperation. The undeniable signature scheme can be used to computerize many applications which can not be done by a conventional digital signature scheme. In this study, we propose the undeniable digital multi-signature scheme which requires many signers and designated verifier. The multi-signature can be verified only in cooperation with all signers. The proposed scheme satisfies undeniable property and it is secure against active attacks such as modification and denial of the multi-signature by signers. We also discuss practical applications such as joint copyright protection on digital contents.

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System based on Java Card Using XML Digital Signature on Wireless Internet (무선 환경에서 XML 전자서명을 이용한 Java Card 기반 시스템)

  • Jang Chang-Bok;Choi Eui-In
    • The KIPS Transactions:PartC
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    • v.12C no.1
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    • pp.37-44
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    • 2005
  • As wireless network was developed and Capability of Wireless Phone was increased, M-Commerce was activates In Wireless network environment. User Authentication and Security in E-Commerce Environment is very important, so Authentication Technology, such as WPKI and Hermes System, XML Digital Signature in Wire Network is studying. But if authentication systems was implemented heterogeneous, WPKI is difficult to implement the system, it's not interoperate with authentication system on wire internet, not support XML digital Signature. Hermes system also not interoperate with XML digital signature system. So our paper designed System that can interoperate among digital signature systems and XML document to apply XML digital signature technology on wire network to wireless network, and then implemented system that can XML digital signature to use Java Card.

Threshold Digital Signatures based on Discrete Logarithm

  • Park, Choonsik
    • Journal of Electrical Engineering and information Science
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    • v.1 no.2
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    • pp.87-95
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    • 1996
  • This paper presents a (k,n) threshold digital signature scheme with no trusted dealer. Our idea is to use the EIGamal signature scheme modified for group use. Among many digital signature schemes, our modification has a nice property for our purpose. We also show a (k.n) threshold fail stop signature scheme and two (k.n) threshold undeniable signature schemes. We use [10] as the original fail stop signature scheme, and use [3] and [2] as the original undeniable signature schemes. Since all these schemes are based on the discrete log problem, we can use the same technique.

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A Study On Digital Signature Using Distance Mixing Algorithm (차분 혼합 알고리즘을 이용한 디지틀 서명에 관한 연구)

  • 박일남
    • The Journal of Information Technology
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    • v.4 no.4
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    • pp.25-35
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    • 2001
  • This paper presents a digital signature scheme for document image which directly embeds a signature onto the document. The time to take in signature is reduced by spreading of signature. Non-repudiation in origin, the 3rd condition of digital signature is realized by proposed digital signature scheme. The transmitter embeds the signature secretly and transfers it and the receiver makes a check of any forgery on the signature and the document, This scheme is compatible with the ITU-T.4(CCITT G3 or G4 facsimile standards).

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A Study on a Blind Signature and Digital Signature (디지털 서명과 은닉서명에 관한 연구)

  • 이재영;이지영
    • Journal of the Korea Society of Computer and Information
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    • v.5 no.3
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    • pp.70-75
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    • 2000
  • This paper first examines the problems of digital signatures concerning discrete logarithms and factorizations. Then the study introduces a blind signature that is based on digital signature. It also attempts to propose a new digital signature by excluding the use of inverse which has presumably caused problems in limited resources. Finally, the paper suggests a blind signature that can be offered by this new digital signature.

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Proxy Based Application Digital Signature Validation System (프락시 기반 애플리케이션 전자서명 검증 시스템)

  • Kwon, Sangwan;Kim, Donguk;Lee, Kyoungwoo
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.27 no.4
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    • pp.743-751
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    • 2017
  • As smart phones are becoming popular, an operating system is being used at wearable devices, home appliances and smart TVs. A user is able to use various applications on devices with operating system, but there is an increased threat of hacker. Thus, the technology for detecting the forgery of applications is becoming more important on operating system. To detect the forgery of the application, a digital signature technology is used on the filed of application digital signature. According to W3C recommendation, the signing process of application digital signature must be performed at least twice, and the applications which are signed by the application digital signature have to be validated for all signature files when the application is installed in the operating system. Hence, the performance of the application digital signature validation system is closely related to the installer performance on the operating system. Existing validation system has performance degradation due to redundancy of integrity verification among application components. This research was conducted to improve the performance of the application digital signature validation system. The proposal of validation system which is applied proxy system shows a performance improvement compared to the existing verification system.

A Proposal On Digital Signature For FAX Document Using DM Algorithm (FAX 문서에 대한 DM 합성 알고리즘을 이용한 디지털 서명의 제안)

  • 박일남;이대영
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.7 no.2
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    • pp.55-72
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    • 1997
  • This paper presents a digital signature scheme for facsimile document which directly embeds a signature onto the document. We use multiple reference lines which have been scanned just before and modify each distance of changing pels both on the reference line specified by key and on the coding line with a single bit of the signature data. The time to take in signature is reduced by spreading of signature. Non-repudiation in origin, the 3rd condition of digital signature is realized by proposed digital signature scheme. The transmitter embeds the signature secretly and transfers it, and the receiver makes a check of any forgery on the signature and the document. This scheme is compatible with the ITU-T.4(CCITT G3 or G4 facsimile standards). The total amount of data transmitted and the image quality are about the same to that of the original document, and thus a third party notices that no signature is embedded on the document.

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Efficient Threshold Schnorr's Signature Scheme (Schnorr 전자서명을 이용한 효율적인 Threshold 서명 기법)

  • 양대헌;권태경
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.14 no.2
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    • pp.69-74
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    • 2004
  • Threshold digital signature is very useful for networks that have no infrastructure such as ad hoc network Up to date, research on threshold digital signature is mainly focused on RSA and DSA. Though Schnorr's digital signature scheme is very efficient in terms of both computation and communication. its hard structure using interactive proof prevents conversion to threshold version. This paper proposes an efficient threshold signature. scheme based on the Schnorr's signature. It has a desirable property of scalability and reduces runtime costs by precomputation.