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61 lines
2.9 KiB
TeX
61 lines
2.9 KiB
TeX
\chapter*{Preface}
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\addcontentsline{toc}{chapter}{Preface}
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Cryptol is a domain-specific language for programming, executing,
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testing, and formally reasoning about streams of bits. It
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particularly excels at specifying and reasoning about cryptographic
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algorithms. It has been designed to reduce the gap that currently
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exists between the {\it specification} of a cryptographic algorithm
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and its executable {\it implementation}. As a result, a well-written
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Cryptol program will look very much like the specification of the
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algorithm it implements, and is also executable.
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Our goal in this book is to both teach you the Cryptol language and
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provide a reference text for the use of the Cryptol system. The
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Cryptol system provides: (1)~a REPL for experimentation, (2)~a parser
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and typechecker for Cryptol programs, (3)~an interpreter for executing
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Cryptol programs, (4)~automatically checking the correctness of
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Cryptol programs via randomized testing, and (5)~formally verifying
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Cryptol programs through the use of an SMT solver.
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We demonstrate Cryptol in action via normal programming problems,
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traditional cryptographic techniques (such as substitution ciphers),
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historical cryptographic mechanisms (such as the Enigma), and modern
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algorithms (such as DES, SHA, and AES), focusing on how they are
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elegantly modeled using the Cryptol language. Since our emphasis is
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on programming, we introduce some of the techniques that are useful
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for the working programmer, including the use of Cryptol's validation
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and verification tools that directly support high-assurance
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programming.
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Our approach is hands on. We strongly urge the reader to try out the
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material using the Cryptol toolset directly. It would be most
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effective to read this document while trying the code and interacting
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with Cryptol itself. For information on how to download and use the
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Cryptol toolset, please visit \url{www.cryptol.net}.
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Most exercises come with solutions provided at the end. We urge the
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readers to refer to solutions as a last resort as they work through
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the exercises.
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\note{This book covers Cryptol version 2, which is still under
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development. It is possible that the syntax and semantics for the
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language or commands will change. You may encounter bugs or
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unexpected behaviors. Please let us know if you encounter any
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problems, by sending email to {\tt cryptol@galois.com} or by
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visiting our GitHub presence linked from the Cryptol website.}
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The authors of this book are Levent {Erk\"{o}k}, Dylan McNamee, Joseph
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Kiniry, Iavor Diatchki, and John Launchbury, with contributions from
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Magnus Carlsson, Kyle Carter, Trevor Elliott, Adam Foltzer, Brian
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Huffman, David Lazar, John Matthews, Eric Mertens, Matt Sottile, Aaron
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Tomb, and Adam Wick.
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\todo[inline]{Replace manual use of Trac URLs with \texttt{ticket}
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macro everywhere.}
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%%% Local Variables:
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%%% mode: latex
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%%% TeX-master: "../main/Cryptol"
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%%% End:
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