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A Visibility-Based Lower Bound for Android Unlock Patterns
Jinwoo LEE Jae Woo SEO Kookrae CHO Pil Joong LEE Dae Hyun YUM 
Publication:   
Publication Date: 2017/03/01
Vol. E100-D  No. 3  pp. 578-581
Type of Manuscript:  LETTER
Category: Information Network
Keyword: 
user authenticationgraphical passwordAndroid unlock patternslower bound
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A Visibility-Based Upper Bound for Android Unlock Patterns
Jinwoo LEE Jae Woo SEO Kookrae CHO Pil Joong LEE Juneyeun KIM Seung Hoon CHOI Dae Hyun YUM 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2016/11/01
Vol. E99-D  No. 11  pp. 2814-2816
Type of Manuscript:  LETTER
Category: Information Network
Keyword: 
user authenticationgraphical passwordAndroid unlock patternsupper bound
 Summary | Full Text:PDF(120.6KB)

Energy-Efficient Hash Chain Traversal
Dae Hyun YUM Jae Woo SEO Pil Joong LEE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/03/01
Vol. E94-A  No. 3  pp. 955-963
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
cryptographyhash chainefficient traversal
 Summary | Full Text:PDF(451.9KB)

Generalized Hash Chain Traversal with Selective Output
Dae Hyun YUM Jae Woo SEO Kookrae CHO Pil Joong LEE 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2010/05/01
Vol. E93-D  No. 5  pp. 1303-1306
Type of Manuscript:  LETTER
Category: Data Engineering, Web Information Systems
Keyword: 
hash chainfractal traversalamortization
 Summary | Full Text:PDF(152.9KB)

Generalized Combinatoric Accumulator
Dae Hyun YUM Jae Woo SEO Pil Joong LEE 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2008/05/01
Vol. E91-D  No. 5  pp. 1489-1491
Type of Manuscript:  Special Section LETTER (Special Section on Information and Communication System Security)
Category: Cryptographic Techniques
Keyword: 
one-way accumulatoraccumulated hash function
 Summary | Full Text:PDF(73.1KB)