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Paper Abstract and Keywords
Presentation 2005-07-22 09:55
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.)
Abstract (in Japanese) (See Japanese page) 
(in English) In Sept.~1990, the present authors firstly discussed DLP over
composite number and presented an ID-based Key Sharing Scheme
referred to as MK1.
In 1991, Maurer and Yacobi presented the similar scheme,
referred to as MY, which is similar to our scheme, MK1.
Unfortunately the schemes MK1 and MY are not secure,
In Dec.~1990, the present authors presented a secure ID-based key sharing scheme
referred to as MK2.
With a rapid progress of computer power for a last 15 years,
our proposed scheme would have more chance to be applied practically.

Regrettably, it is not widely known the fact that
(i) the schemes MY and MK1 are not secure,
(ii) there exists a secure scheme, MK2.
At this time, present authors review MK2
and clarify the difference between MK2 and other schemes from
the standpoint of security.
Keyword (in Japanese) (See Japanese page) 
(in English) Discrete Logarithm Problem / Factoring Problem / ID-Based Cryptosystem / Key Sharing Scheme / Diffie-Hellman Public Key Distribution / DH Problem / Non-Interactive /  
Reference Info. IEICE Tech. Rep., vol. 105, no. 194, ISEC2005-44, pp. 9-16, July 2005.
Paper # ISEC2005-44 
Date of Issue 2005-07-15 (ISEC) 
ISSN Print edition: ISSN 0913-5685
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Conference Information
Committee ISEC IPSJ-CSEC SITE  
Conference Date 2005-07-21 - 2005-07-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Iwate Prefectural University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2005-07-ISEC-IPSJ-CSEC-SITE 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Murakami-Kasahara ID-based Key Sharing Scheme Revisited 
Sub Title (in English) In Comparison With Maurer-Yacobi Scheme 
Keyword(1) Discrete Logarithm Problem  
Keyword(2) Factoring Problem  
Keyword(3) ID-Based Cryptosystem  
Keyword(4) Key Sharing Scheme  
Keyword(5) Diffie-Hellman Public Key Distribution  
Keyword(6) DH Problem  
Keyword(7) Non-Interactive  
Keyword(8)  
1st Author's Name Yasuyuki Murakami  
1st Author's Affiliation Osaka Electro-Communication University (Osaka Electro-Comm. Univ.)
2nd Author's Name Masao Kasahara  
2nd Author's Affiliation Osaka Gakuin University (Osaka Gakuin Univ.)
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Speaker Author-1 
Date Time 2005-07-22 09:55:00 
Presentation Time 25 minutes 
Registration for ISEC 
Paper # ISEC2005-44 
Volume (vol) vol.105 
Number (no) no.194 
Page pp.9-16 
#Pages
Date of Issue 2005-07-15 (ISEC) 


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