svn: ecrypt/trunk/submissions/sss/README

* imported original ECRYPT submissions after first automatic cleanup.

NLS/SSS Version 1.0

NLS is a synchronous stream cipher, and SSS is a self synchronous
stream cipher. Both support MAC calculation across an arbitrary mix of
encrypted and clear text.


There are four distribution tarballs:

   1. nls-1.0.tgz: the NLS cipher and test suite (including
      reference and fast versions).

   2. sss-1.0.tgz: the SSS cipher and test suite (including
      reference and fast versions).

   3. ecrypt-nls-1.0.tgz: the NLS cipher plus a wrapper which
      implements the Ecrypt synchronous stream cipher API.

   4. ecrypt-sss-1.0.tgz: the SSS cipher plus a wrapper which
      implements the Ecrypt self-synchronous stream cipher API.

See http://www.ecrypt.eu.org/stream/api.html for documentation on
the ECRYPT API.


Unpacking the source:

Unpack one or more of the above tarballs. If you want
everything, you only need to get the ecrypt-*.tgz files since they
already contain the underlying cipher code.


Compilation instructions:

   1. Edit "Makefile.config" to define the compilation environment.
      (if you are using a recent gcc on a little-endian machine,
      you can skip this step).

   2. Run "make all".


The results of compilation depend on which tarballs you unpacked:

   1. nls-*.tgz: When built, this produces nlsref.o and nlsfast.o,
      a reference implementation and fast implementation respectively.
      See nls.h for documentation on the low level API.

   2. sss-*.tgz: When built, this produces sssref.o and sssfast.o, a
      reference implementation and fast implementation respectively.
      See sss.h for documentation on the low level API.

   3. ecrypt-nls-*.tgz: When built, this produces ecrypt-nls.o,
      an implementation of the Ecrypt synchronous stream cipher API,
      plus the objects normally built by nls-*.tgz.

   4. ecrypt-sss-*.tgz: When built, this produces ecrypt-sss.o,
      an implementation of the Ecrypt synchronous stream cipher API,
      plus the objects normally built by sss-*.tgz.


Other make targets:

Other useful make targets include "test", "time", "clean", and "dist".
Sophisticated users are referred to the makefiles for more information.

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