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[Classpathx-crypto] latest checkins (long)
From: |
Raif S. Naffah |
Subject: |
[Classpathx-crypto] latest checkins (long) |
Date: |
Wed, 07 Aug 2002 21:03:39 +1000 |
User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.1b) Gecko/20020721 |
hi guys,
i just checked in some bug-fixes, few additions and one new tool: Ent
--a java port of John Walker's ENT program (see
http://www.fourmilab.ch/). its purpose is to compute some statistical
indices for a given stream to assess its degree of randomness.
here is the output of: ant ent
ent:
[java] Total execution time (ms): 631
[java] Computed indices for MD4PRNG:
[java] Total bit count: 8388608
[java] Mean value of set bits: 0.4999542236328125
[java] Mean % deviation: 0.0091552734375
[java] Chi-square distribution: 0.0703125
[java] Chi-square excess % probability: 50.0
[java] Computed PI: 3.143475126171593
[java] Computed PI % deviation: 0.05992096332568889
[java] Serial Correlation Coefficient: -1.6697682580239272E-5
[java] Total execution time (ms): 771
[java] Computed indices for RIPEMD128PRNG:
[java] Total bit count: 8388608
[java] Mean value of set bits: 0.5000506639480591
[java] Mean % deviation: 0.010132789611816406
[java] Chi-square distribution: 0.08612871170043945
[java] Chi-square excess % probability: 50.0
[java] Computed PI: 3.138668589281423
[java] Computed PI % deviation: 0.09307585771914455
[java] Serial Correlation Coefficient: 7.295505921987954E-4
[java] Total execution time (ms): 1102
[java] Computed indices for ICM:
[java] Total bit count: 8388608
[java] Mean value of set bits: 0.49994516372680664
[java] Mean % deviation: 0.010967254638671875
[java] Chi-square distribution: 0.10089874267578125
[java] Chi-square excess % probability: 50.0
[java] Computed PI: 3.1437726736933658
[java] Computed PI % deviation: 0.06939219510465874
[java] Serial Correlation Coefficient: -3.490568320705976E-4
[java] Total execution time (ms): 701
[java] Computed indices for MD5PRNG:
[java] Total bit count: 8388608
[java] Mean value of set bits: 0.5000228881835938
[java] Mean % deviation: 0.00457763671875
[java] Chi-square distribution: 0.017578125
[java] Chi-square excess % probability: 75.0
[java] Computed PI: 3.135807555418226
[java] Computed PI % deviation: 0.18414539405536265
[java] Serial Correlation Coefficient: -5.865306605768334E-5
[java] Total execution time (ms): 961
[java] Computed indices for WHIRLPOOLPRNG:
[java] Total bit count: 8388608
[java] Mean value of set bits: 0.5002869367599487
[java] Mean % deviation: 0.057387351989746094
[java] Chi-square distribution: 2.762627124786377
[java] Chi-square excess % probability: 10.0
[java] Computed PI: 3.138668589281423
[java] Computed PI % deviation: 0.09307585771914455
[java] Serial Correlation Coefficient: 5.689114690354338E-5
[java] Total execution time (ms): 781
[java] Computed indices for RIPEMD160PRNG:
[java] Total bit count: 8388608
[java] Mean value of set bits: 0.49994874000549316
[java] Mean % deviation: 0.010251998901367188
[java] Chi-square distribution: 0.08816719055175781
[java] Chi-square excess % probability: 50.0
[java] Computed PI: 3.1433149082752543
[java] Computed PI % deviation: 0.054821069290864416
[java] Serial Correlation Coefficient: -8.488752540050106E-5
[java] Total execution time (ms): 731
[java] Computed indices for SHA-160PRNG:
[java] Total bit count: 8388608
[java] Mean value of set bits: 0.4998607635498047
[java] Mean % deviation: 0.0278472900390625
[java] Chi-square distribution: 0.6505126953125
[java] Chi-square excess % probability: 50.0
[java] Computed PI: 3.1392636843249675
[java] Computed PI % deviation: 0.07413339416121897
[java] Serial Correlation Coefficient: -4.4878134782710987E-4
[java] Total execution time (ms): 411
[java] Computed indices for UMAC-KDF:
[java] Total bit count: 8388608
[java] Mean value of set bits: 0.5000001192092896
[java] Mean % deviation: 2.384185791015625E-5
[java] Chi-square distribution: 4.76837158203125E-7
[java] Chi-square excess % probability: 75.0
[java] Computed PI: 3.1365857566290156
[java] Computed PI % deviation: 0.15937448017190523
[java] Serial Correlation Coefficient: -1.4114379888497644E-4
BUILD SUCCESSFUL
Total time: 13 seconds
sorting the indices by:
* time: shows that UMacGenerator is the fastest, and ICMGenerator is the
slowest;
* mean % deviation: shows that UMacGenerator is the closest to 0.5 and
Whirlpool is the farthest;
* scc: shows that MD4-based PRNG is closest to 0.0, and RIPEMD-160-based
PRNG is the farthest;
it would be nice, if someone goes through the code and make sure i didnt
code the formulae incorrectly and, may be in the future, add more
indices and/or a gui face to the tool.
i'll continue working on the build and make files for now.
cheers;
rsn
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