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Committee Date Time Place Paper Title / Authors Abstract Paper #
ISEC 2018-09-07
14:25
Tokyo Kikai-Shinko-Kaikan Bldg. New Public key attack on MH knapsak PKC
Ryuichi Sakai, Yasuyuki Murakami (OECU) ISEC2018-58
 [more] ISEC2018-58
pp.39-42
IT, EMM 2018-05-17
16:25
Tokyo Ookayama Campus, Tokyo Institute of Technology Public key attack on knapsak PKC based on subset sum decision problem
Ryuichi Sakai, Yasuyuki Murakami (Osaka Electro-Communication Univ.) IT2018-6 EMM2018-6
In 2012, Murakami, Hamasho and Kasahara have proposed a knapsack PKC based on the subset sum decision problem. An attack... [more] IT2018-6 EMM2018-6
pp.31-34
IA, ICSS 2015-06-12
11:10
Fukuoka Kyushu Institute of Technology Univ. Knapsack Cryptosystems with Random Secret Sequences using Logical And Operation
Yasuyuki Murakami, Shinsuke Hamasho (OECU), Masao Kasahara (WU/CU) IA2015-11 ICSS2015-11
In 2012, the present authors proposed a knapsack public-key cryptosystem using a random secret sequence, which will be r... [more] IA2015-11 ICSS2015-11
pp.57-62
ISEC, IT, WBS 2015-03-03
10:55
Fukuoka The University of Kitakyushu Knapsack Cryptosystem Using Three Random Secret Sequences
Yasuyuki Murakami, Shinsuke Hamasho (OECU), Masao Kasahara (WU/CU) IT2014-91 ISEC2014-104 WBS2014-83
In 2012, the present authors proposed a knapsack public-key cryptosystem using a random secret sequence, which will be r... [more] IT2014-91 ISEC2014-104 WBS2014-83
pp.187-192
ISEC 2014-05-09
13:35
Tokyo Kikai-Shinko-Kaikan Bldg. An Interorganizational Cryptosystem Using RSA PKC
Yasuyuki Murakami (OECU), Masao Kasahara (Waseda Univ./Chuo Univ.) ISEC2014-2
Usual cryptosystems suppose the personal communication.
However, the secure and effecitive communication system
is des... [more]
ISEC2014-2
pp.7-12
EMM, ISEC, SITE, ICSS, IPSJ-CSEC, IPSJ-SPT [detail] 2013-07-19
10:15
Hokkaido   A Knapsack Cryptosystem Using Super-Decreasing Sequence
Shinsuke Hamasho, Yasuyuki Murakami (Osaka Electro-Comm. Univ.) ISEC2013-37 SITE2013-32 ICSS2013-42 EMM2013-39
Merkle-Hellman proposed a knapsack public-key cryptosystem(MH scheme). However, MH scheme was broken by Shamir’s attack ... [more] ISEC2013-37 SITE2013-32 ICSS2013-42 EMM2013-39
pp.263-268
EMM, ISEC, SITE, ICSS, IPSJ-CSEC, IPSJ-SPT [detail] 2013-07-19
10:40
Hokkaido   An Attack Against ID-Based Non-Interactive Key Sharing Scheme Using RSA Problem
Yasuyuki Murakami, Shinsuke Hamasho (Osaka Electro-Comm. Univ.) ISEC2013-38 SITE2013-33 ICSS2013-43 EMM2013-40
 [more] ISEC2013-38 SITE2013-33 ICSS2013-43 EMM2013-40
pp.269-274
ISEC, IPSJ-CSEC, SITE, ICSS, EMM, IPSJ-SPT [detail] 2011-07-13
09:25
Shizuoka Shizuoka University A Note on Security of (u|u+v) Σ PKC against Low-Density Attack
Yasuyuki Murakami (Osaka Electro-Comm. Univ.), Masao Kasahara (Osaka Gakuin Univ.) ISEC2011-16 SITE2011-13 ICSS2011-21 EMM2011-15
In SCIS2011, we presented a new class of knapsack PKC,
constructed based on $(u|u+v)$ construction, referred to as $(u|... [more]
ISEC2011-16 SITE2011-13 ICSS2011-21 EMM2011-15
pp.85-90
ISEC, IPSJ-CSEC, SITE, ICSS [detail] 2009-07-02
13:25
Akita Akita University Security Gap between Double-Sequence Knapsack PKC and Single-Sequence Knapsack PKC against Low-Density Attack (Part2)
Takeshi Nasako, Yasuyuki Murakami (OECU), Masao Kasahara (OGU) ISEC2009-16 SITE2009-8 ICSS2009-30
Recently present authors proposed a double-sequence knapsack public key cryptosystem on the basis of MH PKC. We also pro... [more] ISEC2009-16 SITE2009-8 ICSS2009-30
pp.7-13
ISEC, IPSJ-CSEC, SITE, ICSS [detail] 2009-07-02
13:50
Akita Akita University Relationship between Weight of Plaintext and Successful Attacks in Knapsack Cryptosystems
Tatsuo Douzono, Takeshi Nasako, Yasuyuki Murakami (Osaka Electoro-Communication Univ.) ISEC2009-17 SITE2009-9 ICSS2009-31
 [more] ISEC2009-17 SITE2009-9 ICSS2009-31
pp.15-19
WBS, IT, ISEC 2009-03-09
11:15
Hokkaido Hakodate Mirai Univ. A Note on Security of Knapsack Type PKC with Random Sequence
Yasuyuki Murakami (Osaka Electro-Comm Univ.) IT2008-48 ISEC2008-106 WBS2008-61
Present author proposed a new method for constructing knapsack PKC
by using a random sequence.
In this paper, we propo... [more]
IT2008-48 ISEC2008-106 WBS2008-61
pp.35-40
WBS, IT, ISEC 2009-03-09
11:40
Hokkaido Hakodate Mirai Univ. Security Gap between Double-Sequence Knapsack PKC and Single-Sequence Knapsack PKC against Low-Density Attack
Takeshi Nasako, Yasuyuki Murakami (Osaka Electro-Comm Univ.), Masao Kasahara (Osaka Gakuin Univ.) IT2008-49 ISEC2008-107 WBS2008-62
Recently present authors proposed a double-sequence knapsack public key cryptosystem on the basis of MH PKC(KMN PKC). We... [more] IT2008-49 ISEC2008-107 WBS2008-62
pp.41-45
ISEC 2008-09-12
13:25
Tokyo Kikai-Shinko-Kaikan Bldg. New Trapdoors in Knapsack Public-Key Cryptosystem with Two Sequences as Public Key
Yasuyuki Murakami, Takeshi Nasako (Osaka Electro-Comm. Univ.), Masao Kasahara (Osaka Gakuin Univ.) ISEC2008-64
Present authors proposed a new class of knasack PKC (KMN PKC) which uses two sequences as the public key.
KMN PKC uses... [more]
ISEC2008-64
pp.9-16
ISEC 2008-09-12
13:50
Tokyo Kikai-Shinko-Kaikan Bldg. A Note on Security of KMN PKC
Takeshi Nasako, Yasuyuki Murakami (Osaka Electro-Comm. Univ.), Masao Kasahara (Osaka Gakuin Univ.) ISEC2008-65
Recently present authors proposed a new class of knapsack type cryptosystem on the basis of MH
PKC(KMN PKC). In this p... [more]
ISEC2008-65
pp.17-20
ISEC, SITE, IPSJ-CSEC 2008-07-24
13:00
Fukuoka Fukuoka Institute of System LSI Design Industry A Note on the Security of KMN PKC and Presentation of Challenge Problems
Masao Kasahara (Osaka Gakuin Univ.), Yasuyuki Murakami, Takeshi Nasako (Osaka Electro-Comm. Univ.) ISEC2008-16 SITE2008-10
In this paper we discuss on a method for improving the security of the previously propsed KMN PKC where two pairs of cip... [more] ISEC2008-16 SITE2008-10
pp.1-8
ISEC, LOIS 2007-11-21
13:30
Hyogo Kobe University A New Construction of Knapsack Cryptosystem
Masao Kasahara (Osaka Gakuin Univ.), Yasuyuki Murakami, Takeshi Nasako (Osaka Electro-Comm. Univ.) ISEC2007-89 OIS2007-61
In this paper we propose a new method for constructing the public-key
cryptosytems on the basis of the classical Merkl... [more]
ISEC2007-89 OIS2007-61
pp.1-6
ISEC, LOIS 2005-11-14
15:20
Fukuoka Kitakyushu Science and Research Park A Proposal of Three Term Public-Key Cryptosystem, KM(3)-PKC -- Along with Challenge Problems on KM(3)-PKC of Very Small Key-Size --
Masao Kasahara (Osaka Gakuin Univ.), Yasuyuki Murakami (Osaka Electro-Comm. Univ.)
 [more] ISEC2005-94 OIS2005-57
pp.33-37
ISEC, IPSJ-CSEC, SITE 2005-07-22
09:55
Iwate Iwate Prefectural University Murakami-Kasahara ID-based Key Sharing Scheme Revisited -- In Comparison With Maurer-Yacobi Scheme --
Yasuyuki Murakami (Osaka Electro-Comm. Univ.), Masao Kasahara (Osaka Gakuin Univ.)
In Sept.~1990, the present authors firstly discussed DLP over
composite number and presented an ID-based Key Sharing Sc... [more]
ISEC2005-44
pp.9-16
ISEC, IPSJ-CSEC, SITE 2005-07-22
17:00
Iwate Iwate Prefectural University Security of DOM Knapsack PKC against Low-Density Attack by Computer Experiment
Takeshi Nasako, Yasuyuki Murakami (OECU)
The low-density attack(LDA) is an effective attack to the knapsack cryptosystems when the density is low.
We proposed t... [more]
ISEC2005-63
pp.143-147
ISEC, IPSJ-CSEC, SITE 2005-07-22
17:25
Iwate Iwate Prefectural University Improving the security of S boxes in DES using Genetic Algorithm
Atsushi Koyama, Yasuyuki Murakami (OECU)
As for the Feistel cipher, it is known that the security of DES depends on the strength of S-box. DES is broken with the... [more] ISEC2005-64
pp.149-154
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