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Level II Challenges (108)

Page 1 of the challenges in Level II, ordered by date posted (the most recent appear first).

Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 2

[wolf-02] - 9 users already solved this challenge, 4 are working on it.
 
 
 

By the time quantum computers exist, the actual signing algorithms are not secure anymore. Then one can switch e.g. to so-called "Unbalanced Oil and Vinegar" systems. It is your challenge to break such a system, with realistic parameters, today already.
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Published on: 2011-04-13 17:17
Maximum number of attempts for this challenge: 20

All successful users of this challenge

Rank User (#9) Achieved points (Global score) y-m-d - h:m:s

Keith Randall (randall77) 1185 (31011) 2011-11-09 17:38:44
J. M. (jomandi) 1182 (113270) 2011-11-19 15:39:10
Viktor (Veselovský) 1179 (128689) 2011-12-04 02:39:48
Bart den Hartog (Bart13) 1133 (118984) 2013-01-27 23:02:55
#5 Luigi Tomelli (archstanton) 1132 (95549) 2013-02-23 15:23:21
#6 Alain (Integral) 1117 (198642) 2014-02-26 23:08:05
#7 Em Doulgerakis (Greko) 1104 (113859) 2015-07-23 10:07:47
#8 Mir Dim (mir0soft) 1095 (72404) 2017-06-08 08:42:28
#9 Kasia (kasia-tutej) 1093 (45961) 2017-11-28 17:38:00
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   +++    [15:04 - 18.06.2018] slg2011 solved the Level I challenge 'Original Caesar Cipher'    +++    [14:48 - 18.06.2018] bogdan.oprea solved the Level II challenge 'AES ECB Wrong Encoding'    +++    [14:47 - 18.06.2018] slg2011 solved the Level I challenge 'Number Sequence — Part 9'    +++    [14:46 - 18.06.2018] agigi solved the Level II challenge 'AES ECB Wrong Encoding'    +++    [14:09 - 18.06.2018] radu0627 solved the Level I challenge 'Number Sequence — Part 9'    +++