Welcome to TiddlyWiki created by Jeremy Ruston, Copyright © 2007 UnaMesa Association
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To get started with this blank TiddlyWiki, you'll need to modify the following tiddlers:
* SiteTitle & SiteSubtitle: The title and subtitle of the site, as shown above (after saving, they will also appear in the browser title bar)
* MainMenu: The menu (usually on the left)
* DefaultTiddlers: Contains the names of the tiddlers that you want to appear when the TiddlyWiki is opened
You'll also need to enter your username for signing your edits: <<option txtUserName>>
These InterfaceOptions for customising TiddlyWiki are saved in your browser
Your username for signing your edits. Write it as a WikiWord (eg JoeBloggs)
<<option txtUserName>>
<<option chkSaveBackups>> SaveBackups
<<option chkAutoSave>> AutoSave
<<option chkRegExpSearch>> RegExpSearch
<<option chkCaseSensitiveSearch>> CaseSensitiveSearch
<<option chkAnimate>> EnableAnimations
----
Also see AdvancedOptions
[img[In YU, 2009|./pic56-2.jpg]]
I am an assistant professor at the [[Department of Information and Communication Engineering|http://ice.yu.ac.kr]] in the College of Engineering, Yeungnam University. My reserch interests include information security, applied cryptography, and multimedia security.
Before joining Yeungnam University, I worked at [[GeorgiaTech|http://www.gatech.edu]] [[Information Security Center|http://www.gtisc.gatech.edu]] as a visiting post-doctoral researcher and research staff. My host was Prof. [[Alexandra S. Boldyreva|http://www.cc.gatech.edu/~aboldyre]]. I worked for some crypto projects with her and [[Adam O'Neill|http://cs-people.bu.edu/amoneill/]], who was advised by her. I was also involved in the project regarding spam call prevention over VoIP networks. I worked with Prof. [[Mustaq Ahamad|http://www.cc.gatech.edu/~mustaq]] and his Ph.D. candidate [[Vijay A. Balasubramanian|http://www.cc.gatech.edu/grads/v/vijayab/Site/Home.html]] on the project.
I got my Ph.D. from [[Computer Science Division|http://cs.kaist.ac.kr]], Electronic Engineering and Computer Science Department, [[Korea Advanced Institute of Science and Technology|http://www.kaist.edu]] (KAIST). My Ph.D. advisor is Prof. [[Hyunsoo Yoon|http://nslab.kaist.ac.kr/~hyoon]].
!!Contact information
younholee at yu.ac.kr
Please click [[here|./CV.pdf]].
With the growing deployment of networks and the Internet, the importance of network security has increased recently. However, systems that detect intrusions, which are important in security countermeasures, have been unable to provide proper analysis or an effective defense mechanism. Instead, they have overwhelmed human operators with a large volume of intrusion detection alerts. This work has proposed a fast and efficient system for analyzing alerts. The proposed system basically depends on the probabilistic correlation. In addition to this, we enhanced the probabilistic correlation by applying more systematically defined similarity functions and also suggested a new correlation component that is absent in other correlation models. The system can produce meaningful information by aggregating and correlating the large volume of alerts and can detect large-scale attacks such as distributed denial of service (DDoS) in early stage. We measured the processing rate of each elementary component and carried out a scenario-based test in order to analyze the efficiency of our system. Although the system is still imperfect, we were able to reduce the numerous redundant alerts 5.5% of the original volume without distorting the meaning through two-phase reduction. This ability reduces the management overhead drastically and makes the analysis and correlation easy. Moreover, we were able to construct attack scenarios for multistep attacks and detect large-scale attacks in real time.
[1] A. Boldyreva, N. Chenette, Y. Lee, A. O’Neill “[[Order-Preserving Symmetric Encryption|http://www.cc.gatech.edu/~aboldyre/papers/bclo.pdf]].” In proc. Advances in Cryptology: EUROCRYPT’09, pp. 224-241, 2009. (Authors listed in alphabetical order by last name)
[2] Y. Lee, Y. Park, "Framework Design and Performance Analysis on Pairwise Key Establishment", in proc. APNOMS 2009, pp. 311-320, 2009.
[3] Y. Lee, Y. Park, H. Kim, H. Yoon “[[A New Proxy Signature Scheme Providing Self-delegation|http://www.springerlink.com/content/d21034n772801846/]].” In 9th annual International Conferences on Information Security and Cryptology (ICISC), Lecture Notes in Computer Science, vol. 4296, pp. 328-342, 2006.
[4] H. Kim, Y. Lee, B. Chung. H. Yoon “[[Digital Rights Management with Right Delegation for Home Network|http://www.springerlink.com/content/u83135t52n285265/]].” In proceedings of 9th ICISC, Lecture Notes in Computer Science, vol. 4296, pp. 233-245, 2006.
[5] Y. Park, Y. Lee, H. Kim, G. Lee, I. Kim “[[Hardware Stack Design Towards An Effective Defense Against Frame Pointer Overwriting Attacks|http://www.springerlink.com/content/f544238023832775/]].” In proceedings of the 1st International Workshop on Security (IWSEC), Lecture Notes in Computer Science, vol. 4266, pp. 268-277, 2006.
[6] J. Hur, Y. Lee, S. Hong, H. Yoon. "[[Trust Management for Resilient Wireless Sensor Networks|http://www.springerlink.com/content/k1u8233t76r02361/]]." In proceedings of 8th ICISC, Lecture Notes in Computer Science, vol. 3935, pp. 56-68, 2006.
[7] Y. Lee, H. Kim, B. Chung, J. Lee, H. Yoon "[[On Demand Secure Routing Protocol for Ad Hoc Network using ID based Cryptosystem]]." In proceedings of the 6th Parallel and Distributed Computing, Applications and Technologies (PDCAT'03), vol. 1, pp. 211~215, 2003.
[8] Y. Lee, H. Kim, B. Chung, J. Lee, Y. Ha, H. Yoon "Fast Finite Field Division Operation in GF(2m) for Efficient Elliptic Curve Cryptosystem.", In proceedings of the 1st International Workshop on Cryptology and Network Security (CANS), pp. 230~237, Sep. 2001.
Current publications are:
[[Address Permutation for Privacy-Preserving Searchable Symmetric Encryption|http://etrij.etri.re.kr/Cyber/BrowseAbstract.jsp?vol=34&pg=66]]
[[A robust and flexible digital rights management system for home networks|http://www.sciencedirect.com/science/article/pii/S0164121210001317]]
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* Install [[Plugins]] to extend the core functionality (find them at [[TiddlyVault|http://tiddlyvault.tiddlyspot.com/]] or you can try [[writing or adapting your own|http://tiddlywiki.org/wiki/Plugin_Development]])
* Use the ColorPalette to change the basic colour scheme
* Use built in [[Formatting|ExtendedFormatting]] techniques
* Create a CustomStyleSheet for finer grained control over the appearance
* Customise the PageTemplate, ViewTemplate or EditTemplate to change the composition of the page and the layout of individual tiddlers
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There are also a bunch of TiddlyWikiTools that you can use to enhance TiddlyWiki.
Please refer to the paper "a new data hiding scheme for binary image authentication with small image distortion".
We have implmented public key cryptosystems such as RSA, DSA, ECDSA, ECDH on various platforms. Because of restricted computation and memory resources, we enhanced the efficiency of computing these algorithms with various methods so that they run within a reasonable time. The platforms considered are JavaCard, J2ME, WIPI and raw ARM7 and ARM9 environments.
In this work, we proposed a robust and flexible Digital Rights Management system for home networks . In the proposed system, the central authority delegates its authorization right to the local manager in a home network by issuing a proxy certificate, and the local manager flexibly controls the access rights of home devices on digital contents with its proxy certificate. Furthermore, the proposed system provides a temporal accessing facility for external devices and achieves strong privacy for home devices. For the validation of delegated rights and the revocation of compromised local managers, a hybrid mechanism combining OCSP validation and periodic renewal of proxy certificates is also included in the proposed system.
To protect critical infrastructures or some important systems, various protectection systems such as IDS, Firewall have been used. Recently, Honeypot system has been proposed. Honeypot system is usually employed to obtain the attacker's attack method. However, because Honeypot just waits for the contacts of attackers passively, it cannot collect the attacker's method unless they contact to Honeypot. We have been proposed a new system to diverse attacker's packets to Honeypot system. Since attackers initially use the typical methods such as scaning to find the vulnerablity of the target system, detection systems like IDS can recognize them and diverse them to Honeypot. Therefore, the proposed system enhances the number of attack-methods collected by Honeypot system per unit time.
My doctroral thesis concerns secure right delegation where an entity delegates his right to another entity to execute the right owner's task on one's behalf. The related crypto field dealing with the application is "Proxy signature".
My thesis consists of three parts:
In the first part, I have shown the proxy previous signature schemes cannot be secure on some practical environment. In this work, I have inverstigated a lot of proxy signature schemes in the literature, and found that they cannot be used in practice even though they were proven to be provably secure. The problem came from the assumptions that they have.
The second part is about "Self-delegatable proxy signature", which enables to delegate a user's right separately to each of the user's devices, but from the view of other users' devices, all of the one's devices are recognized as they have the same identity. This work is an improvement of Malkin et al's generic proxy signature scheme (Eurocrypt 2004).
The final part is about the X.509 proxy certificate standard which has been used for Computational Grids. Since one of the objectives of the Computational Grids is to share computational tasks with other idle devices, they need to share the resources to execute the tasks in parallel.
Unfortunately, it can happen that the idle devices and the resources are in separate security domain so the secure right delegation problem can occur. To resolve this issue, the X.509 proxy certificate standard has been suggested and is still on revision status.
I have shown that the right delegation protocol in the standard has security weakness and suggested a new secure right delegation protocol using ID-based cryptosystem. Moreover, the experimental result has shown that the required computational resource for delegation is much less in the proposed protocol than in the standard protocol.
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You'll also need to enter your username for signing your edits: <<option txtUserName>>
[1] Y. Lee, I. Kim, and Y. Park, "Improved multi-precision squaring for low-end RISC microcontrollers", Journal of Systems and Software 86(1), pp. 60-71, 2013.
[2] D. Choi, S. Kim, and Y. Lee, "Address Permutation for Privacy-Preserving Searchable Symmetric Encryption", ETRI Journal 34(1), pp. 66-75, 2012.
[3] S. Lee, N. Kim, H. Kim, Y. Lee, and H. Yoon, "Sensor Node Localization by Three Mobile Anchors in the Wireless Sensor Networks", IEICE Transactions on Information and Systems E94-D (10), pp. 1981-1988, 2011.
[4] H. Kim, Y. Lee, Y. Park, "A Robust and Flexible Digital Rights Management System for Home Networks", Journal of Systems and Software, 83(12), pp. 2431-2440, 2010.
[5] D. Choi, S. Jin , Y. Lee, Y. Park, "[[Personalized EigenTrust with the Beta Distribution|http://etrij.etri.re.kr]]", ETRI Journal, vol. 32, no. 2, pp. 348-350, 2010.
[6] Y. Lee, H. Kim, Y. Park "[[A new data hiding scheme for binary image authentication with small image distortion|http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V0C-4WY141X-2&_user=945096&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_searchStrId=1157124603&_rerunOrigin=scholar.google&_acct=C000048947&_version=1&_urlVersion=0&_userid=945096&md5=9f22233609400a1f94ec3d776d902d71]]." Information Sciences, Elsevier, vol. 179, no. 22, pp. 3866-3884, 2009. (2009 IF:3.095)
[7] D. Choi, Y. Lee, Y. Park, S. Jin, H. Yoon “[[Efficient and Secure Self-Organized Public Key Management for Mobile Ad hoc Networks|http://search.ieice.org/bin/summary.php?id=e91-b_11_3574&category=B&year=2008&lang=E&abst=]].” IEICE Transactions on Communications, vol. E91-B, no. 11, pp.3574-3583, 2008.
[8] Y. Lee, H. Kim, Y. Park, H. Yoon “[[An Efficient Delegation Protocol with Delegation Traceability in the X.509 Proxy Certificate Environment for Computational Grids|http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V0C-4S575Y8-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=576e91ad27caedaa2c8fe67311c628a8]].” Information Sciences, Elsevier, vol. 178, no. 14, pp. 2968-2982, 2008.
[9] Y. Lee, J. Hur, H. Kim, Y. Park, H. Yoon “[[A New Binary Image Authentication Scheme with Small Distortion and Low false negative rate|http://koasas.kaist.ac.kr/bitstream/10203/11066/1/2007.%2011%20-%20A%20New%20Bianry%20Authencation%20Scheme%20with%20Small%20Distortion%20and%20Low%20False%20Negative%20Rates.pdf]].” IEICE Transactions on Communications, vol. E90-B, no. 11, pp. 3259-3262, 2007.
[10] H. Kim, B. Chung, Y. Lee, Y. Park, H. Yoon “[[Weakness of the Synchro-Difference LKH scheme for Secure Multicast|http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4299429]].” IEEE Communications Letters, vol. 11, no. 9, pp. 765-767, 2007.
[11] H. Kim, Y. Lee, Y. Park, H. Yoon “[[Reactive Key Management Scheme for Access Control in Group Communications|http://koasas.kaist.ac.kr/bitstream/10203/11065/1/2007.%204%20-%20Reactive%20Key%20Management%20Scheme%20for%20Access%20Control%20in%20Group%20Comms.pdf]].” IEICE Transactions on Communications, vol. E90-B, no. 4, pp. 982-986, 2007.
[12] J. Lee, H. Kim, Y. Lee, S. Hong, H. Yoon, “[[Parallelized Scalar Multiplication on Elliptic Curves Defined over Optimal Extension Field|http://ijns.nchu.edu.tw/contents/ijns-v4-n1/ijns-2007-v4-n1-p99-106.pdf]].” International Journal of Network Security, vol. 4, no. 1, pp. 99-106, 2007.
[13] Y. Lee, Y. Park, H. Kim, S. Hong, H. Yoon “[[Rogue Public Key Registration Attack and the Importance of 'Proof of Possession' in PKI Environment|https://search.ieice.org/bin/summary.php?id=e89-d_8_2452&category=D&year=2006&lang=E&abst=&auth=1]].” IEICE Transactions on Information & Systems, vol. E89-D, no. 3, 2452-2455, 2006.
[14] S. Lee, B. Chung, H. Kim, Y. Lee, C. Park, H. Yoon “[[Real-time Analysis of Intrusion Detection Alerts Via Correlation|http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V8G-4HJRRK9-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=304349f3bdda0420009da7131623f751]].” Computers & Security, Elsevier, vol. 25, no. 3, pp. 169-183, 2006.
[15] H. Kim, Y. Lee, S. Hong, H. Yoon, “[[Active Trial-and-error Attack on SASC Protocols|http://ijns.nchu.edu.tw/contents/ijns-v2-n2/ijns-2006-v2-n2-p105-110.pdf]].” International Journal of Network Security, vol. 2, no. 2, pp. 103-107, 2006.
[16] Y. Lee, H. Kim, S. Hong, H. Yoon, “[[Expansion of Sliding Window Method for Finding Shorter Addition/Subtraction-Chains|http://ijns.nchu.edu.tw/contents/ijns-v2-n1/ijns-2006-v2-n1-p34-40.pdf]].” International Journal of Network Security, vol. 2, no. 1, pp. 54-60, 2006.
![[About me]]
![[Research project experience]]
![[Publications]]
![[Other activities]]
[[Some papers|http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4489492]] indicate that this work is the first trial to apply ID-based cryptosystem for secure routing in sensor/ad hoc networks. The paper is given [[here|http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1236290]].
On From Jan. 2007 to Mar. 2007, I lectured about how to make prime number efficiently on ARM processor environment for the members in [[Coding and Cryptography Laborartory|http://ccl.snu.ac.kr/]], [[Department of Electrical Engineering|http://ee.snu.ac.kr/eng]], [[Seoul National University|http://www.useoul.edu/]]. [[Here|./EFNC_2007.pdf]]'s a slide I presented.
As professional services, I served as a reviewer for the [[Journal of Systems and Software|http://www.elsevier.com/wps/find/journaldescription.cws_home/505732/description#description]] in 2007, and I am serving as a reviewer for [[Computers & Security|http://www.elsevier.com/wps/find/journaldescription.cws_home/405877/description#description]] since 2007. I also served as a sub reviewer for [[Eurocrypt 2009|http://www.iacr.org/conferences/eurocrypt2009/submission.html]] conference.
On From Jan. 2007 to Mar. 2007, I consulted how to make prime number efficiently on ARM processor environment for [[Coding and Cryptography Laborartory|http://ccl.snu.ac.kr/]] in the [[Department of Electrical Engineering|http://ee.snu.ac.kr/eng]], [[Seoul National University|http://www.useoul.edu/]]. [[Here|./EFNC_2007.pdf]]'s a slide that I presented.
As professional services, I served as a reviewer for the [[Journal of Systems and Software|http://www.elsevier.com/wps/find/journaldescription.cws_home/505732/description#description]] in 2007, and now I am serving as a reviewer for [[Computers & Security|http://www.elsevier.com/wps/find/journaldescription.cws_home/405877/description#description]] journal since 2007. I also served as a sub reviewer for [[Eurocrypt 2009|http://www.iacr.org/conferences/eurocrypt2009/submission.html]] conference.
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[1] J. Lee, H. Kim, H. Yoon, B. Chung, Y. Lee “Active Delegation Method Based on Local Domain Manager for Content DRM system.” patent pending in Korea (P2007-0066609) , USA, EU, India, China, and Japan.
[2] H. Yoon, C. Park, Y. Lee, H. Kim, J. Song, S. Lee, B. Chung, K. Lee, “Secure Solution System based on Network”, patent in Korea (10-0518119-0000).
[[Journal Articles]]
[[Conference Papers]]
[[Patents]]
[[References]]
Prof. [[Hyunsoo Yoon|http://nslab.kaist.ac.kr/~hyoon]]
Computer Science Division,
Korea Advanced Institute of Science and Technology
Prof. [[Alexandra Boldyreva|www.cc.gatech.edu/~ablodyre]]
College of Computing,
Georgia Institute of Technology
Prof. [[Yongsu Park|http://usecurity.hanyang.ac.kr/wiki.php/Members]]
College of Information and Communication
Hanyang University, Korea
!!May. 2010 ~ Apr. 2012
[[Cryptographic Protocols for Securing Cloud Computing Service]] The objective of the research is to find some security problems if the cloud computing service is used and to suggest the solutions for them. The topics are access pattern hiding, digital rights management, secure multi-keyword search, and some web-service security issues. This work is supported by the general researcher program for young researchers (NRF, Korea).
!!Oct. 2007 ~ Feb. 2009
I worked as a visiting postdoctoral researcher and research staff in GTISC, GeorgiaTech. The name of the project is "Provably-secure cryptographic schemes for applications of emerging importance". As my first work in GTISC, I had studied "[[Order-Preserving Symmetric Encryption|http://http://www.cc.gatech.edu/~aboldyre/papers/bclo.pdf]]" scheme with Prof. Alexandra Boldyreva and Ph.D. students Adam O'Neill and Nathan Chanette, and a preliminary result of this topic has been accepted for publication in Proc. of Eurocrypt 2009.
I was also involved in the project of spam call prevention over Voice over IP networks. I am working with Vijay A. Balasubramanian, whose advisor is Prof. Mustaque Ahamad, the director of [[GTISC|http://www.gtisc.gatech.edu]]. I am supported by him through his funding from IBM TSS and AT&T.
!!Sep. 2006 ~ Aug. 2007
[[Data hiding for binary images]] supported by [[BK21 project|http://bnc.krf.or.kr/home/eng/]]. I worked as a postdoc in [[Korea Advanced Institute of Science and Technology|http://www.kaist.edu/english/]] due to my military service.
!!Sep. 2004 ~ Aug. 2006.
[[Doctroal research]]
!!Apr. 2006. ~ Nov. 2006.
[[Development and Research of Active Delegation Method Based on Local Domain Manager for Content DRM system]] (supported by [[Samsung Electronics|http://www.samsung.com/us]], Korea)
!!Mar. 2000 ~ Jan. 2002, Jul. 2003 ~ Nov. 2003.
[[Design and Implementation of High Performance Public-Key Cryptography Software on various environments]] (supported by [[ETRI|http://www.etri.re.kr]], Korea)
!!Apr. 2004. ~ Nov. 2004.
[[Trust management for ad-hoc and sensor networks]] (supported by Electornics and Telecommunication Research Institute [[ETRI|http://www.etri.re.kr/eng]] and National Security Research Institute ([[NSRI|http://www.nsri.re.kr]]), Korea)
!!Oct. 2002. ~ Oct. 2003.
[[Co-relation analysis on intrusion-alerts]] (supported by [[ETRI|http://www.etri.re.kr/eng]], Korea)
!!Dec. 2001 ~ Dec. 2003.
[[Development of Network Based Cyber Attacker Surveillance and Control Technology]] (supported by [[Ministry of Science & Technology|http://english.mest.go.kr/]], Korea)
!!Mar. 2000 ~ Jan. 2002, Jul. 2003 ~ Nov. 2003.
[[Design and Implementation of High Performance Public-Key Cryptography Software on various environments]] (supported by [[ETRI|http://www.etri.re.kr/eng]], Korea)
Thank you for visiting my website!
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We dealt with the security problems in the distributed networks such as ad-hoc networks and sensor networks. Since nodes in these networks are relatively easy to be captured by adversary, traditional cryptogrphic approaches have a limitation to solve this problem. We have proposed a new approach to prevent insider attacks with the trust-based approach. In the proposed approach, even if the cryptographic keys are exposed, the overall performance of networks degrades gracefully in proportion to the increase of the key-exposured nodes.