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- Path: sparky!uunet!ogicse!unmvax!cs.sandia.gov!mccurley
- From: mccurley@cs.sandia.gov (Kevin S. McCurley)
- Newsgroups: sci.crypt
- Subject: Re: SHS/SHA source code + random thoughts
- Keywords: SHS SHA message digest
- Message-ID: <1992Sep5.151837.14322@cs.sandia.gov>
- Date: 5 Sep 92 15:18:37 GMT
- Article-I.D.: cs.1992Sep5.151837.14322
- References: <1992Sep4.060230.28313@cs.aukuni.ac.nz>
- Sender: usenet@cs.sandia.gov (Another name for news)
- Organization: Sandia National Laboratories, Albuquerque, NM
- Lines: 63
-
- In article <1992Sep4.060230.28313@cs.aukuni.ac.nz> Peter Gutmann (pgut1@cs.aukuni.ac.nz) writes:
- >SHA Speed
- >=========
- >
- > I ran the SHA code against the distributed version of MD5 (which is
- >significantly less optimised than the SHA code). The results were as follows:
- >
- > 25 MHz PClone DECstation 2100 DECstation 5000
- >
- > SHA 31 K/sec 120 K/sec 208 K/sec
- > MD5 55 K/sec 169 K/sec 278 K/sec
- >
- >This comparison isn't 100% fair since the standard MD5 distribution is a
- >somewhat pessimal implementation (in fact an optimised PC version runs around 5
- >times faster). An implementation of MD5 optimised to the level of SHA runs
- >around 2 times faster.
-
- I too have written a version of SHA in C. I have now tested it on
- numerous machines, but have not really optimized it for any (that
- would require assembly language - yuck). My personal animosity for
- MS-DOG also prevented me from working hard on the PC version. The
- biggest improvements from a C version are probably possible for
- little-endian machines like 80x86 machines.
-
- Here are the results (all speeds are for hashing stuff from memory -
- the time to read a file slows them down by about 10%): If you think
- the choice of machines is bizarre - it's what I could find handy at
- the time. I omitted the really rare machines!
-
- machine bytes/second
- ---------------------------------------------------------
- IBM RS/6000 530H, xlc -O 1,098,000
- SGI IRIS (33 MHz Model 4D340), cc -O3 1,038,200
- Sun Sparcstation 2, cc -O4 1,009,000
- IBM RS/6000 530, xlc -O -Q 832,600
- SGI IRIS (25 MHz Model 4D240), cc -O3 806,000
- DECstation 5000, cc -O4 598,000
- Sun Sparcstation 1+, cc -O3 507,000
- Sun Sparcstation 1, cc -O4 498,000
- DECstation 3100, gcc -O2 495,000
- NeXTstation cc -O 347,000
- Gateway 2000 (50MHz 80486Dx2), gcc -O2 244,710
- Sequent Symmetry (Intel 386), cc -O4 87,128
- Zenith 386 (16MHz), gcc -O2 81,761
- Gateway 2000, Turbo C 2.0 57,569
- Zenith 386, Turbo C 2.0. 17,700
-
- The only direct comparision I see to Peter's figures are for the
- Decstation 5000, where my results are about a factor of 2.8 faster.
- This comparison may not be fair, since I don't know how Peter could
- find a better compiler for his, or maybe he is reading stuff from a
- file.
-
- The only comparision I made to MD5 is using the code distributed by
- anonymous FTP from rsa.com, which ran about 15% faster than my SHA
- code on a Sparcstation 2.
-
- As for judging the cryptographic strength of the two, only time will
- tell. In the meantime, unless disaster strikes, SHA is likely to
- become SHS.
-
- Kevin McCurley
- Sandia National Laboratories
-