Storin: a block cipher for digital signal processors


Storin is an 8-round SP network designed to play to the strengths of
digital signal processors.

Files included:

configure		A shell script to set up the Storin build
			environment on your computer.

configure.in		The m4 source code for configure.

aclocal.m4		Some m4 macros used by configure.in.

Makefile.in		A skeleton Makefile for building Storin.

Makefile.am		The Automake source for Makefile.in

bits.c, bits.h		Bit-manipulation macros.

arith24.c, arith24.h	Some simple 24-bit arithmetic.

matrix.c, matrix.h	Matrix arithmetic over Z_{2^{24}}.

storin.c, storin.h	The main cipher implementation.

sha.c, sha.h		Implementation of SHA-1.

dsarand.c, dsarand.h	SHA-1 based random number generator, suitable
			for generating DSA parameters using the FIPS-180
			algorithm. 

fibrand.c, fibrand.h	A fast non-secure Fibonacci generator with a
			long period, a large state and good properties.

lcrand.c, lcrand.h	A non-secure linear congruential generator with
			good statistical properties used for seeding
			fibrand.

storin-mktab.c		A program for building Storin matrices.  It uses
			dsarand to provide confidence that `trap doors'
			haven't been inserted in the matrix.

storin-tests.c		A program for making Storin test vectors.  It
			outputs test vectors in mLib/Catacomb format.

sym.c, sym.h		An efficient extensible hashtable, used by
			diffan.

diffan.c		A program to perform differential analysis of
			the matrix multiplication.

sac.c			A program to perform statistical testing of
			three Storin rounds to ensure strict avalanche.

storin.ps		A paper, in PostScript, defining the Storin
			cipher and providing some preliminary analysis.

storin.tex		The TeX source to the Storin paper.

storin.tests		A file of test vectors useful for testing your
			implementation.

storin.debug		A file showing a Storin key schedule and
			encryption, with all intermediate values.
			Useful when you're trying to produce your own
			implementation.


Programs built:

storin-debug		Generates storin.debug.

storin-tests		Generates storin.tests.

storin-mktab		Generates the Storin matrix and its inverse,
			given a seed string.

diffan			Performs a statistical differential analysis of
			the matrix multiplication.

sac			Performs statistical testing of Storin for
			strict avalanche.


The software is provided under two licences.  It is up to you which you
want to use:

  * A slightly modified version of the BSD licence, without the
    `advertising materials' clause.

  * The GNU General Public Licence.

The latter is provided in order make it explicitly clear that the author
has no objections to this software being distributed under the GPL.

Verbatim copies of the paper may be distributed with or without charge,
but altering its text or meaning is not allowed.

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