#6566: method key_space() for classical cryptosystems
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       Reporter:  mvngu              |        Owner:  somebody
           Type:  enhancement        |       Status:  positive_review
       Priority:  major              |    Milestone:  sage-
      Component:  cryptography       |  duplicate/invalid/wontfix
       Keywords:  key space,         |   Resolution:
  classical cryptosystems            |    Merged in:
        Authors:                     |    Reviewers:
Report Upstream:  N/A                |  Work issues:
         Branch:                     |       Commit:
   Dependencies:                     |     Stopgaps:
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Comment (by tscholl2):

 I marked this as wont fix because it's implemented at least as of 6.4. In
 6.7 The following works

     sage: S = HillCryptosystem(AlphabeticStrings(),3)
     sage: S.key_space()
     Full MatrixSpace of 3 by 3 dense matrices over Ring of integers modulo
 26
 {{{
     sage: S = SubstitutionCryptosystem(AlphabeticStrings())
     sage: S.key_space()
     Free alphabetic string monoid on A-Z

     sage: S = TranspositionCryptosystem(AlphabeticStrings(),2)
     sage: S.key_space()
     Symmetric group of order 2! as a permutation group

     sage: S = VigenereCryptosystem(AlphabeticStrings(), 2)
     sage: S.key_space()
     Free alphabetic string monoid on A-Z
 }}}

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Ticket URL: <http://trac.sagemath.org/ticket/6566#comment:8>
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