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TLINDEN
2015-09-27 17:28:20 +02:00
parent ee3c91234b
commit 3c4788312c
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README.md
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@@ -63,8 +63,6 @@ FIXME.
## Analysis so far
These are the results of the previous (128bit) version.
While this stuff only exists for me to play around with
crypto, I tried to test the cipher a little bit. Here are
my results using a couple of statistical measurements:
@@ -81,7 +79,7 @@ My own measurement, see analyze.c:
File size: 35147 bytes
Char distribution: 100.000000%
Char redundancy: 0.000000%
Char entropy: 7.995333 bits/char
Char entropy: 7.994904 bits/char
Compression rate: 0.000000% (35147 => 35168 bytes)
For comparision, AES result:
@@ -108,6 +106,18 @@ For comparision, AES result:
Monte Carlo value for Pi is 3.172955438 (error 1.00 percent).
Serial correlation coefficient is -0.004405 (totally uncorrelated = 0.0).
Entropy = 7.994904 bits per byte.
Optimum compression would reduce the size
of this 35147 byte file by 0 percent.
Chi square distribution for 35147 samples is 248.29, and randomly
would exceed this value 60.64 percent of the times.
Arithmetic mean value of data bytes is 127.9724 (127.5 = random).
Monte Carlo value for Pi is 3.101929315 (error 1.26 percent).
Serial correlation coefficient is -0.000624 (totally uncorrelated = 0.0).
For comparision, AES result:
Entropy = 7.994892 bits per byte.
@@ -128,37 +138,5 @@ I fed the contents of my primary disk into TWENTY4 and its output
into diehard:
dd if=/dev/sda4 of=/dev/stdout | ./stream 1 e | dieharder -a -g 200
#=============================================================================#
# dieharder version 3.31.1 Copyright 2003 Robert G. Brown #
#=============================================================================#
rng_name |rands/second| Seed |
stdin_input_raw| 1.86e+05 |2067533949|
#=============================================================================#
test_name |ntup| tsamples |psamples| p-value |Assessment
#=============================================================================#
diehard_birthdays| 0| 100| 100|0.11286983| PASSED
diehard_operm5| 0| 1000000| 100|0.14228207| PASSED
diehard_rank_32x32| 0| 40000| 100|0.08372938| PASSED
diehard_rank_6x8| 0| 100000| 100|0.47630577| PASSED
diehard_bitstream| 0| 2097152| 100|0.68878582| PASSED
diehard_opso| 0| 2097152| 100|0.36965490| PASSED
diehard_oqso| 0| 2097152| 100|0.85360068| PASSED
diehard_dna| 0| 2097152| 100|0.41389081| PASSED
diehard_count_1s_str| 0| 256000| 100|0.64198483| PASSED
diehard_count_1s_byt| 0| 256000| 100|0.48126427| PASSED
diehard_parking_lot| 0| 12000| 100|0.61281762| PASSED
diehard_2dsphere| 2| 8000| 100|0.98794548| PASSED
diehard_3dsphere| 3| 4000| 100|0.86553337| PASSED
diehard_squeeze| 0| 100000| 100|0.47837267| PASSED
diehard_sums| 0| 100| 100|0.26661852| PASSED
diehard_runs| 0| 100000| 100|0.78455791| PASSED
diehard_runs| 0| 100000| 100|0.56428921| PASSED
diehard_craps| 0| 200000| 100|0.81900152| PASSED
diehard_craps| 0| 200000| 100|0.54592338| PASSED
ctrl-c
(FIXME: I aborted here, I'll repeat that one later)
So, all those checks don't look that bad, but of course this doesn't
say much about TWENTY4's security. However, not THAT bad for the first cipher :)
FIXME: missing.