sigs sigs software provides secure digital signatures with verification at secret-key speeds.
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digital Secure signatures secure digital signatures secret-key verification signature verification

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sigs software provides secure digital signatures with verification at secret-key speeds. sigs software provides secure digital signatures with verification at secret-key speeds. See BLURB for a more detailed advertisement.It runs only on i386-based UNIX machines with GMP 2. It is optimized for the Pentium.The rest of this file is a list of systypes where various versions ofsigs have been reported to work.How to install: 1. Compile the programs: % make You will need GMP 2 installed as -lgmp. 2. Create the formatted man pages, *.0: % make man 3. Install the programs and man pages: # make setupHow to test: 4. Create a predictable 2048-bit ``secret'' key, and check that it matches my prediction: % ./predictable | ./secretkey 2048 > KEY % cmp KEY TESTKEY 5. Create the corresponding public key, and check that it matches my prediction: % ./publickey < KEY > PUBLIC % cmp PUBLIC TESTPUBLIC 6. Generate a signature for snefrusboxes.c, and check that it matches my prediction: % ./sign KEY < snefrusr.c > SIG % cmp SIG TESTSIG 7. Create a predictable ``secret'' judge, and check that it matches my prediction: % ./predictable | ./secretjudge > JUDGE % cmp JUDGE TESTJUDGE 8. Check that the signature refers to snefrusboxes.c: % ./match SIG < snefrusr.c 9. Check that the signature is under this public key: % ./prove PUBLIC SIG10. Use the judge for an even faster verification: % ./verify JUDGE PUBLIC SIG11. Make your own secret key and secret judge, using a secret stream of cryptographically random bits: % mkdir ~/Keys % ./secretkey 2048 < /dev/random > ~/Keys/sigs % ./publickey < ~/Keys/sigs > ~/Keys/sigs.public % ./secretjudge < /dev/random > ~/Keys/judge Note that /dev/random will pause if your system is completely idle. If your system does not support a cryptographically secure /dev/random, find another cryptographic generator and use that.12. Try signing and verifying an empty document with your key: % ./sign ~/Keys/sigs < /dev/null > SIG % ./match SIG < /dev/null % ./verify ~/Keys/judge ~/Keys/sigs.public SIG % ./prove ~/Keys/sigs.public SIG % rm SIG Now publish sigs.public. Anyone can use sigs.public to verify your signatures.That's it! To report success: % ( echo 'First M. Last'; cat `cat SYSDEPS` ) | mail djb-qst@koobera.math.uic.eduReplace First M. Last with your name.

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