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revision 1.148 by tjl, Mon May 19 21:52:29 2003 UTC revision 1.149 by benja, Mon May 19 22:00:46 2003 UTC
# Line 60  and improvements have been published Line 60  and improvements have been published
60  [merkle80protocols-andalso-merkle87digital-andalso-bleichenbacheroptimal-andalso-perrig01biba-andalso-reyzin02better]_.  [merkle80protocols-andalso-merkle87digital-andalso-bleichenbacheroptimal-andalso-perrig01biba-andalso-reyzin02better]_.
61  Despite their limitations, one-way signatures have  Despite their limitations, one-way signatures have
62  attracted considerable interest because  attracted considerable interest because
63  their operation  their operation does not rely on
 does not  
 rely on  
64  trapdoor functions, whose strength is based on  trapdoor functions, whose strength is based on
65  unproven number-theoretic assumptions such as the  unproven number-theoretic assumptions such as the
66  difficulty of factoring large integers [XXX].  difficulty of factoring large integers [XXX].
   
 This is important for, e.g., long-term digital publishing  
 where the usual recommended digital signature expiration  
 time of two years[XXX] is inconvenient [anderson98eternal]_.  
67    
68    Unlike signature schemes based on trapdoor functions,
69    one-time signatures can withstand a long-time
70    cryptoanalytic attack; keys therefore need not
71    expire after a small number of years.
72    This is important for e.g. long-term
73    digital publishing [anderson98eternal]_.
74    The alternative, digital timestamping [XXX],
75    adds additional complication because
76    it needs a secure, trusted timestamping service.
77    
78  In this article, we introduce a new signature scheme,  In this article, we introduce a new signature scheme,
79  based on one-time signatures and a random oracle,  based on one-time signatures and a random oracle,

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