Table Of ContentL e c t u r e N o t e s i n C o m p u t e r S c i e n c e 1 9 9 2
E d i t e d b y G . G o o s , J . H a r t m a n i s a n d J . v a n L e e u w e n
3
B e r lin
H e id e lb e r g
N e w Y o r k
B a r c e lo n a
H o n g K o n g
L o n d o n
M ila n
P a r is
S in g a p o r e
T o k y o
K w a n g j o K i m ( E d . )
P u b l i c K e y
C r y p t o g r a p h y
4 t h I n t e r n a t i o n a l W o r k s h o p o n P r a c t i c e a n d T h e o r y
i n P u b l i c K e y C r y p t o s y s t e m s , P K C 2 0 0 1
C h e j u I s l a n d , K o r e a , F e b r u a r y 1 3 - 1 5 , 2 0 0 1
P r o c e e d i n g s
1 3
S e r ie s E d ito r s
G e r h a r d G o o s , K a r ls r u h e U n iv e r s ity , G e r m a n y
J u r is H a r tm a n is , C o r n e ll U n iv e r s ity , N Y , U S A
J a n v a n L e e u w e n , U tr e c h t U n iv e r s ity , T h e N e th e r la n d s
V o lu m e E d ito r
K w a n g jo K im
I n f o r m a tio n a n d C o m m u n ic a tio n s U n iv e r s ity , I n f o r m a tio n S e c u r ity G r o u p
5 8 - 4 H w a a m - d o n g , Y u s o n g - g u , T a e jo n 3 0 5 - 7 3 2 , K o r e a
E - m a il: k k j@ ic u .a c .k r
C a ta lo g in g - in - P u b lic a tio n D a ta a p p lie d f o r
D ie D e u ts c h e B ib lio th e k - C I P - E in h e its a u f n a h m e
P u b lic k e y c r y p to g r a p h y : p r o c e e d in g s / 4 th I n te r n a tio n a l W o r k s h o p o n
P r a c tic e a n d T h e o r y in P u b lic K e y C r y p to s y s te m s , P K C 2 0 0 1 , C h e ju
I s la n d , K o r e a , F e b r u a r y 1 3 - 1 5 , 2 0 0 1 . K w a n g jo K im ( e d .) . - B e r lin ;
H e id e lb e rg ; N e w Y o r k ; B a r c e lo n a ; H o n g K o n g ; L o n d o n ; M ila n ;
P a r is ; S in g a p o r e ; T o k y o : S p r in g e r, 2 0 0 1
( L e c tu r e n o te s in c o m p u te r s c ie n c e ; V o l. 1 9 9 2 )
I S B N 3 - 5 4 0 - 4 1 6 5 8 - 7
C R S u b je c t C la s s ifi c a tio n ( 1 9 9 8 ) : E .3 , G .2 .1 , D .4 .6 , K .6 .5 , F .2 .1 - 2 , C .2 , J .1
I S S N 0 3 0 2 - 9 7 4 3
I S B N 3 - 5 4 0 - 4 1 6 5 8 - 7 S p r in g e r- V e r la g B e r lin H e id e lb e rg N e w Y o r k
T h is w o rk is su b je c t to c o p y rig h t. A ll rig h ts a re re se rv e d , w h e th e r th e w h o le o r p a rt o f th e m a te ria l is
c o n c e rn e d , sp e c ifi c a lly th e rig h ts o f tra n sla tio n , re p rin tin g , re -u se o f illu stra tio n s, re c ita tio n , b ro a d c a stin g ,
re p ro d u c tio n o n m ic ro fi lm s o r in a n y o th e r w a y , a n d sto ra g e in d a ta b a n k s. D u p lic a tio n o f th is p u b lic a tio n
o r p a rts th e re o f is p e rm itte d o n ly u n d e r th e p ro v isio n s o f th e G e rm a n C o p y rig h t L a w o f S e p te m b e r 9 , 1 9 6 5 ,
in its c u rre n t v e rsio n , a n d p e rm issio n fo r u se m u st a lw a y s b e o b ta in e d fro m S p rin g e r-V e rla g . V io la tio n s a re
lia b le fo r p ro se c u tio n u n d e r th e G e rm a n C o p y rig h t L a w .
S p rin g e r-V e rla g B e rlin H e id e lb e rg N e w Y o rk
a m e m b e r o f B e rte lsm a n n S p rin g e r S c ie n c e + B u sin e ss M e d ia G m b H
© S p rin g e r-V e rla g B e rlin H e id e lb e rg 2 0 0 1
P rin te d in G e rm a n y
T y p e se ttin g : C a m e ra -re a d y b y a u th o r, d a ta c o n v e rsio n b y S te in g rä b e r S a tz te c h n ik G m b H , H e id e lb e rg
P rin te d o n a c id -fre e p a p e r S P IN : 1 0 7 8 2 0 9 4 0 6 /3 1 4 2 5 4 3 2 1 0
Preface
The PKC2001 conference was held at Shilla Hotel, Cheju Island, Korea, 13–15
February 2001. Continuing the first conference PKC1988 in Yokohama, Japan,
PKC1999 in Kamakura, Japan, and PKC2000 in Melbourne, Australia,
PKC2001, the fourth conference in the international workshop series was dedi-
cated to practice and theory in public key cryptography.
Theprogramcommitteeoftheconferencereceived67submissionsfrom14coun-
tries and regions (Australia, Austria, China, Denmark, Esponia, France, Ger-
many, Greece, Korea, Singapore, Spain, Taiwan, UK, and USA), of which 30
were selected for presentation. All submissions were anonymously reviewed by
at least 3 experts in the relevant areas. Revisions were not checked, and the
authors bear full responsibility for the contents of their papers. In addition,
therewerethreeinvitedtalksbyJun-CheolYangoftheMinistryofInformation
andCommunication,Korea;MihirBellareoftheUniversityofCaliforniaatSan
Diego, USA; and Ko Itoh of the Organization for Road System Enhancement,
Japan.
The program committee consisted of 20 experts in cryptography and data se-
curity drawn from the international research community: Kwangjo Kim (Chair,
Information and Communications University, Korea), Claude Crepeau (McGill
University, Canada), Ed Dawson (Queensland University of Technology, Aus-
tralia), Yvo Desmedt (Florida State University, USA), Chi Sung Laih (National
Cheng Kung University, Taiwan), Pil Joong Lee (POSTECH, Korea), Arjen
Lenstra (Citibank, USA), Tsutomu Matsumoto (Yokohama National Univer-
sity, Japan), David Naccache (Gemplus, France), Eiji Okamoto (University of
Wisconsin-Milwaukee, USA), Tatsuaki Okamoto (NTT Labs, Japan), Choonsik
Park (ETRI, Korea), Sung Jun Park (BCQRE, Korea), Josef Pieprzyk (Uni-
versity of Wollongong, Australia), Claus Schnorr (Frankfurt University, Ger-
many), Nigel Smart (University of Bristol, UK), Jacques Stern (ENS, France),
Susanne Wetzel (Bell Labs, USA), Moti Yung (CertCo, USA), and Yuliang
Zheng (Monash University, Australia). Members of the committee spent nu-
merous hours in reviewing the submissions and providing advice and comments
on the selection of papers.
Theprogramcommitteealsoaskedtheexpertadviceofmanyoftheircolleagues,
including: Ingrid Biehl, Colin Boyd, Marco Bucci, Gary Carter, Seong Taek
Chee, Jean-S´ebastien Coron, Nora Dabbous, Jean-Franc¸ois Dhem, Marc Fis-
chlin, Roger Fischlin, Pierre Girard, Jaeseung Go, Juanma Gonzalez-Nieto, He-
lena Handschuh, Marie Henderson, Markus Jakobsson, Marc Joye, Jinho Kim,
Seungjoo Kim, Ju Seung Kang, Tri V. Le, Byoungcheon Lee, Hyejoo Lee, Phil
MacKenzie, David M’Ra¨ıhi, Renato Menicocci, Bernd Meyer, Pascal Paillier,
Sang Joon Park, B´eatrice Peirani, Jason Reid, Hein Roehrig, Amin Shokrollahi,
IgorShparlinski,JessicaStaddon,RonSteinfeld,ChristopheTymen,andKapali
Viswanathan. We apologize for any omission in this list.
VI Preface
We would like to take this opportunity to thank all the program committee
membersandexternalexpertsfortheirinvaluablehelpinproducingsuchahigh
quality program.
Our appreciation also goes to members of C&IS Lab. (Cryptology and Informa-
tion Security Laboratory), including Gookwhan Ahn, Jaeseung Go, Jinho Kim,
Heesun Kim, Myungsun Kim, Manho Lee, Byoungcheon Lee, Jaegwan Park,
Hyuncheol Park, and Boyeon Song for their skillful and professional assistance
inorganizingthisconference.ChoyoungKimdeservesspecialthanksforherhelp
with preparation of the various tasks of the conference. We are also grateful to
all the organizing committee members for their volunteer work.
Last, but not least, we would like to thank all the authors who submitted their
paperstotheconference(includingthosewhosesubmissionswerenotsuccessful),
as well as the conference participants from around the world, for their support,
which made this conference possible.
February 2001
Kwangjo Kim
PKC 2001
2001 International Workshop
on Practice and Theory
in Public Key Cryptography
Shilla Hotel, Cheju Island, Korea
13–15 February 2001
Sponsored by
Cryptology and Information Security Laboratory (C&IS Lab.)
of Information and Communications University
(caislab.icu.ac.kr)
In cooperation with
Korea Institute of Information Security and Cryptology (KIISC)
(www.kiisc.or.kr)
Under the Patronage of
Ministry of Information and Communication (MIC), Korea
Financially Supported by
Electronic and Telecommunications Research Institute (ETRI),
SAMSUNG SECUi.COM, STI (SECURITY Technologies Inc.),
BCQRE, KSIGN, SECUVE, and SOFTFORUM
VIII Organization
General Co-chair
Hideki Imai (University of Tokyo, Japan)
Kil-Hyun Nam (Korea National Defense University, Korea)
Program Committee
Kwangjo Kim, Chair (Information and Communications University, Korea)
Claude Crepeau (McGill University, Canada)
Ed Dawson (Queensland University of Technology, Australia)
Yvo Desmedt (Florida State University, USA)
Chi Sung Laih (National Cheng Kung University, Taiwan)
Pil Joong Lee (POSTECH, Korea)
Arjen Lenstra (Citibank, USA)
Tsutomu Matsumoto (Yokohama National University, Japan)
David Naccache (Gemplus, France)
Eiji Okamoto (University of Wisconsin-Milwaukee, USA)
Tatsuaki Okamoto (NTT Labs, Japan)
Choonsik Park (ETRI, Korea)
Sung Jun Park (BCQRE, Korea)
Josef Pieprzyk (University of Wollongong, Australia)
Claus Schnorr (Frankfurt University, Germany)
Nigel Smart (University of Bristol, UK)
Jacques Stern (ENS, France)
Susanne Wetzel (Bell Labs, USA)
Moti Yung (CertCo, USA)
Yuliang Zheng (Monash University, Australia)
Organizing Committee
Kyung Hyune Rhee, Chair (Pukyong National University, Korea)
Donnie Choi (STI, Korea)
Hyon Cheol Chung (SOFTFORUM, Korea)
Ki-Yoong Hong (KSIGN, Korea)
Kwangjo Kim (Information and Communications University, Korea)
Kyong-Soo Oh (SAMSUNG SECUi.COM, Korea)
Ji-Hwan Park (Pukyong National University, Korea)
Dae Hyun Ryu (Hansei University, Korea)
Table of Contents
On the Security of a Williams Based Public Key
Encryption Scheme .........................................................1
Siguna Mu¨ller (Univ. of Klagenfurt, Austria)
Semantically Secure McEliece Public-Key Cryptosystems
– Conversions for McEliece PKC – .........................................19
Kazukuni Kobara and Hideki Imai (Univ. of Tokyo, Japan)
IND-CCA Public Key Schemes Equivalent to Factoring n=pq .............36
Kaoru Kurosawa, Wakaha Ogata, Toshihiko Matsuo,
and Shuichi Makishima, (Tokyo Inst. of Tech., Japan)
Identification, Signature and Signcryption
Using High Order Residues Modulo an RSA Composite ....................48
Yuliang Zheng (Monash Univ., Australia)
On the Security of Lenstra’s Variant of DSA
without Long Inversions ...................................................64
Arjen K. Lenstra (Citibank, USA)
and Igor E. Shparlinski (Macquarie Univ., Australia)
Fast Irreducibility and Subgroup Membership Testing in XTR .............73
Arjen K. Lenstra (Citibank, USA)
and Eric R.Verheul (PricewarterhouseCoopers, Netherlands)
A New Aspect for Security Notions: Secure Randomness
in Public-Key Encryption Schemes .........................................87
Takeshi Koshiba (Fujitsu, Japan)
The Gap-Problems: A New Class of Problems
for the Security of Cryptographic Schemes ................................104
Tatsuaki Okamoto (NTT, Japan)
and David Pointcheval (ENS, France)
A Generalisation, a Simplification and Some Applications
of Paillier’s Probabilistic Public-Key System ..............................119
Ivan Damg˚ard and Mads Jurik (Univ. of Aarhus, Denmark)
Marking: A Privacy Protecting Approach Against Blackmailing ...........137
Dennis Ku¨gler and Holger Vogt (Darmstadt Univ. of Tech., Germany)
Cryptanalysis of Two Sparse Polynomial Based
Public Key Cryptosystems ................................................153
Feng Bao, Robert H. Deng (Kent Ridge Digital Labs, Singapore),
Willi Geiselmann (Univ. of Karlsruhe, Germany),
Claus Schnorr (Frankfurt Univ., Germany),
Rainer Steinwandt (Univ. of Karlsruhe, Germany),
and Hongjun Wu (Kent Ridge Digital Labs, Singapore)
Cryptanalysis of PKP: A New Approach ..................................165
E´liane Jaulmes and Antoine Joux (DCSSI, France)
