• Title, Summary, Keyword: 비밀분산방식

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Identity-Based Secret Sharing (식별정보 기반 비밀 분산)

  • Chung, Young-Seok;Moon, Jong-Cheol;Lee, Sang-Hwan;Lee, Rae;Seo, In-Seok;Won, Dong-Ho
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.897-900
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    • 2005
  • 본 논문에서는 식별 정보 기반의 비밀 분산 방식을 제안한다. 본 방식에서는 비밀 정보를 분할한 부분 정보에 딜러와 참가자의 식별정보가 포함된다. 각 식별정보는 비밀 분할 및 복원 과정에서 딜러와 참가자, 참가자와 참가자 간 상대방을 인증하는데 사용된다. 또한 참가자 간에는 상호 부분 정보의 송 수신 외에 딜러와의 통신 등 별도의 통신 과정 없이 부분 정보의 검증이 이루어진다.

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Distributed Data Management based on t-(v,k,1) Combinatorial Design (t-(v,k,1) 조합 디자인 기반의 데이터 분산 관리 방식)

  • Song, You-Jin;Park, Kwang-Yong;Kang, Yeon-Jung
    • The KIPS Transactions:PartC
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    • v.17C no.5
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    • pp.399-406
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    • 2010
  • Many problems are arisen due to the weakness in the security and invasion to privacy by malicious attacker or internal users while various data services are available in ubiquitous network environment. The matter of controlling security for various contents and large capacity of data has appeared as an important issue to solve this problem. The allocation methods of Ito, Saito and Nishizeki based on traditional polynomial require all shares to restore the secret information shared. On the contrary, the secret information can be restored if the shares beyond the threshold value is collected. In addition, it has the effect of distributed DBMS operation which distributes and restores the data, especially the flexibility in realization by using parameters t,v,k in combinatorial design which has regularity in DB server and share selection. This paper discuss the construction of new share allocation method and data distribution/storage management with the application of matrix structure of t-(v,k,1) design for allocating share when using secret sharing in management scheme to solve the matter of allocating share.

A Secure Data Transmission Scheme Based on Secret Sharing for the Maritime Cloud Environment (해사클라우드 환경에 적합한 비밀분산 기반의 안전한 데이터 전송 기법)

  • Lee, Donghyeok;Park, Namje
    • KIISE Transactions on Computing Practices
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    • v.23 no.4
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    • pp.232-237
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    • 2017
  • The Maritime Cloud is a technology that enables the seamless exchange of information between several communication links in the maritime domain. Although research on The Maritime Cloud security is still at an early stage, furthering this knowledge is vital to securing the marine environment. In this paper, we propose a method for secure data transmission through The Maritime Cloud domain. The proposed technique, based on the "secret sharing" scheme, is delivered through specifically-dedicated geocasting software. Thus, only authorized vessels can restore the original information. The proposed method is safe from so-called "sniffing" and "man-in-the-middle" attacks.

A study on Public Key Authentication using Polynomial Secret Sharing in WSN (무선센서네트워크에서 다항식 비밀분산을 이용한 공개키 인증방식에 관한 연구)

  • Kim, Il-Do;Kim, Dong-Cheon
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.13 no.11
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    • pp.2479-2487
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    • 2009
  • Earlier researches on Sensor Networks preferred symmetric key-based authentication schemes in consideration of limitations in network resources. However, recent advancements in cryptographic algorithms and sensor-node manufacturing techniques have opened suggestion to public key-based solutions such as Merkle tree-based schemes. This paper proposes a new concept of public key-based authentication using Polynomial Secret Sharing that can be effectively applied to sensor networks and a detection of malicious node using the hash function. This scheme is based on exponential distributed data concept, a derivative from Shamir's (t,n) threshold scheme, in which the authentication of neighbouring nodes are done simultaneously while minimising resources of sensor nodes and providing network scalability.

Implementation and Design of Artificial Intelligence Face Recognition in Distributed Environment (분산형 인공지능 얼굴인증 시스템의 설계 및 구현)

  • 배경율
    • Journal of Intelligence and Information Systems
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    • v.10 no.1
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    • pp.65-75
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    • 2004
  • It is notorious that PIN(Personal Identification Number) is used widely for user verification and authentication in networked environment. But, when the user Identification and password are exposed by hacking, we can be damaged monetary damage as well as invasion of privacy. In this paper, we adopt face recognition-based authentication which have nothing to worry what the ID and password will be exposed. Also, we suggest the remote authentication and verification system by considering not only 2-Tier system but also 3-Tier system getting be distributed. In this research, we analyze the face feature data using the SVM(Support Vector Machine) and PCA(Principle Component Analysis), and implement artificial intelligence face recognition module in distributed environment which increase the authentication speed and heightens accuracy by utilizing artificial intelligence techniques.

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The Divisible Electronic Cash System using Secret Sharing Scheme (비밀 분산 기법을 이용한 분할 가능한 전자화폐 시스템)

  • 장석철;이임영
    • Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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    • pp.189-192
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    • 2001
  • 최근 정보통신기술의 발전과 인터넷의 폭발적인 사용자 증가로 인해 전자상거래가 활성화되고 있다. 또한 전자상거래에서 가장 중요한 시스템인 전자화폐 시스템에 대한 연구와 개발이 활발하게 진행되고 있다. 특히, 전자화폐 시스템의 요구사항 중에 분할성 관련된 연구는 대부분이 계층적 구조 테이블을 이용한 방식이었다. 하지만 이 방식은 많은 메모리가 필요하고, 또한 많은 계산량을 필요로 한다는 단점이 있다. 따라서 본 논문에서는 이러한 문제점을 해결하고, 계층적 구조 테이블을 이용하지 않고 분할성을 제공할 수 있는 또 다른 방식인 비밀분산 기법을 이용하여 새로운 전자화폐 시스템을 제안한다.

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New Construction for Reducing the Number of Subpixel in Visual Cryptography (시각암호에서 부화소를 줄이기 위한 새로운 구성법)

  • 양신석;박지환
    • Proceedings of the Korea Multimedia Society Conference
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    • pp.205-209
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    • 1998
  • 시각암호는 n개로 분산된 비밀화상을 슬라이드와 같이 물리적으로 중첩 가능한 곳에 인쇄하여 그룹내 n명에게 슬라이드를 배포한 후, 임의의 k명 이상의 슬라이드를 겹치면 비밀 화상을 복원할 수 있지만, k-1명 이하의 슬라이드를 겹치는 경우에는 비밀화상을 복원할 수 없는 방식이다. 이 논문에서는 (k, n) 시각암호의 휘도(contrast)를 개선하기 위한 구성법에서 모든 경우에 동일 휘도를 유지하면서 부화소의 수를 줄이기 위한 새로운 구성법을 제안한다.

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Distributed Access Privilege Management for Secure Cloud Business (안전한 클라우드 비즈니스를 위한 접근권한 분산관리)

  • Song, You-Jin;Do, Jeong-Min
    • The KIPS Transactions:PartC
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    • v.18C no.6
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    • pp.369-378
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    • 2011
  • To ensure data confidentiality and fine-grained access control in business environment, system model using KP-ABE(Key Policy-Attribute Based Encryption) and PRE(Proxy Re-Encryption) has been proposed recently. However, in previous study, data confidentiality has been effected by decryption right concentrated on cloud server. Also, Yu's work does not consider a access privilege management, so existing work become dangerous to collusion attack between malicious user and cloud server. To resolve this problem, we propose secure system model against collusion attack through dividing data file into header which is sent to privilege manager group and body which is sent to cloud server. And we construct the model of access privilege management using AONT based XOR threshold Secret Sharing, In addition, our scheme enable to grant weight for access privilege using XOR Share. In chapter 4, we differentiate existing scheme and proposed scheme.

A Password-Authenticated Key Distribution Method Using Threshold PKC (Threshold PKC를 이용한 패스워드 기반 키분배 방식)

  • 이영숙;이영교;원동호
    • The Journal of the Korea Contents Association
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    • v.4 no.3
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    • pp.53-60
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    • 2004
  • In this paper we present user authentication and key distribution using threshold PKC(Public Key Cryptosystem), which is secure against the dictionary attack. The n servers hold a t-out-of-n sharing of the dealer's secret key. When the server authenticate a user, at least f of them cooperate they can reconstruct password verifier.

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