Account

Name
Kurt Gebauer
Username
Yokozuna
Joined
March 5, 2012, 8:30 p.m.

Rank
3
Points
286,256
Trophies
Gold30
Silver32
Bronze18

Active Challenges (1)

LevelNameAttemptsDate
Number Sequence — Part 59 / 15June 10, 2014, 8:28 p.m.

Solved Challenges (213)

LevelNamePointsDate
The SZ42 Challenge — Part 131,824Oct. 7, 2021, 11:44 p.m.
The SZ42 Challenge — Part 121,824Oct. 7, 2021, 10:19 p.m.
Hilly — Part 11,104June 5, 2021, 12:12 p.m.
Wheatstone Cryptograph — Part 22,000May 22, 2021, 1:51 a.m.
Spanish Strip Cipher — Part 21,091May 20, 2021, 9:05 a.m.
Wheatstone Cryptograph — Part 1200April 22, 2021, 2:19 a.m.
The SZ42 Challenge — Part 111,307March 11, 2021, 11:39 a.m.
The SZ42 Challenge — Part 102,000Jan. 30, 2021, 5:40 p.m.
Find the right route — Part 3200Dec. 27, 2020, 5:23 p.m.
The SZ42 Challenge — Part 92,000Dec. 19, 2020, 6:28 p.m.
The SZ42 Challenge — Part 82,000Oct. 31, 2020, 9:34 p.m.
Find the right route — Part 1200Oct. 27, 2020, 8:13 p.m.
The SZ42 Challenge — Part 72,000Oct. 27, 2020, 7:33 p.m.
The SZ42 Challenge — Part 62,000Oct. 2, 2020, 9:03 p.m.
The SZ42 Challenge — Part 52,000Sept. 4, 2020, 11:33 a.m.
The SZ42 Challenge — Part 42,000Aug. 30, 2020, 12:14 a.m.
The SZ42 Challenge — Part 32,000Aug. 15, 2020, 11:28 p.m.
The SZ42 Challenge — Part 22,000Aug. 5, 2020, 11:56 p.m.
The SZ42 Challenge — Part 11,523July 30, 2020, 5:36 p.m.
Lightweight Introduction to Lattices — Part 32,000July 16, 2020, 2:34 p.m.
Lightweight Introduction to Lattices — Part 2200June 24, 2020, 1:42 a.m.
Lightweight Introduction to Lattices — Part 1108May 28, 2020, 1:59 p.m.
Lattice Part 11,085May 25, 2020, 10:57 p.m.
The Heavy T52 Sturgeon Challenge — Part 518,745April 23, 2020, 11:55 p.m.
The Heavy T52 Sturgeon Challenge — Part 417,893April 20, 2020, 9:51 p.m.
Polyhomophonic Substitution — Part 32,000April 7, 2020, 3:25 p.m.
Polyhomophonic Substitution — Part 22,000March 28, 2020, 10:26 p.m.
Polyhomophonic Substitution — Part 1200March 22, 2020, 4:33 p.m.
The SIGABA Challenge — Part 318,390March 15, 2020, 7:50 a.m.
The SIGABA Challenge — Part 21,576March 11, 2020, 11:19 a.m.
The SIGABA Challenge — Part 11,523March 8, 2020, 5:38 a.m.
The LoRa Cipher: Logic Randomness — Part 12,000Feb. 20, 2020, 2:32 a.m.
Holographic Encryption — Part 11,117Feb. 3, 2020, 8:16 a.m.
Differential Cryptanalysis — Part 21,824Jan. 30, 2020, 12:15 a.m.
Spirale — Part 21,103Jan. 28, 2020, 12:25 p.m.
Spirale — Part 11,103Jan. 28, 2020, 12:24 p.m.
Polyphonic Substitution Cipher — Part 22,000Jan. 14, 2020, 8:46 p.m.
Christmas Challenge 2019: Differential Cryptanalysis — Part 11,523Dec. 30, 2019, 3:08 a.m.
RSA Factoring Challenge: RSA-2400Dec. 3, 2019, 2:09 a.m.
Polyphonic Substitution Cipher — Part 11,547Nov. 28, 2019, 2:28 a.m.
Cipher ID — Part 11,613Nov. 23, 2019, 10:20 p.m.
A Cloaked Substitution Cipher — Part 22,000Aug. 26, 2019, 3:17 p.m.
A Cloaked Substitution Cipher — Part 11,824Aug. 23, 2019, 9:06 a.m.
The T52 Sturgeon Challenge — Part 91,456Aug. 21, 2019, 10:34 p.m.
The T52 Sturgeon Challenge — Part 101,485Aug. 20, 2019, 3:56 a.m.
The T52 Sturgeon Challenge — Part 81,523Aug. 18, 2019, 4:55 p.m.
The T52 Sturgeon Challenge — Part 121,523Aug. 18, 2019, 3:58 p.m.
The T52 Sturgeon Challenge — Part 111,523Aug. 18, 2019, 3:58 p.m.
The T52 Sturgeon Challenge — Part 61,613Aug. 15, 2019, 2:53 p.m.
The T52 Sturgeon Challenge — Part 71,613Aug. 15, 2019, 3:30 a.m.
The T52 Sturgeon Challenge — Part 51,660Aug. 13, 2019, 11:24 p.m.
Cryptanalysis Hacking Puzzles — Part 2100July 29, 2019, 10:37 p.m.
The T52 Sturgeon Challenge — Part 41,725July 25, 2019, 6:49 p.m.
The T52 Sturgeon Challenge — Part 32,000July 23, 2019, 7:38 a.m.
The T52 Sturgeon Challenge — Part 22,000July 23, 2019, 12:55 a.m.
The T52 Sturgeon Challenge — Part 11,725July 16, 2019, 4:47 a.m.
Handycipher made in love — Part 22,000May 22, 2019, 4:17 a.m.
Homophonic Encryption — Part 31,660May 12, 2019, 9:56 a.m.
Homophonic Encryption — Part 21,725May 11, 2019, 8:56 p.m.
Homophonic Encryption — Part 12,000May 5, 2019, 1:33 p.m.
Monoalphabetic Substitution with Nostradamus Flavor2,000Feb. 17, 2019, 6:54 a.m.
Handycipher made in love — Part 12,000Feb. 17, 2019, 5:12 a.m.
Cryptanalysis Hacking Puzzles — Part 1113Nov. 3, 2018, 3:32 p.m.
Breaking a Filter Generator1,824Sept. 26, 2018, 9:06 p.m.
Autokey Cipher200Sept. 26, 2018, 2:53 a.m.
Modular Sequences200Sept. 26, 2018, 2:12 a.m.
Trendy Messenger2,000June 13, 2018, 11:25 a.m.
Fastest in the West2,000June 13, 2018, 3:24 a.m.
Summer Job2,000June 12, 2018, 9:37 p.m.
Number Sequence — Part 10200April 18, 2018, 8:22 p.m.
The Einstein Enigma2,000Feb. 8, 2018, 8:23 p.m.
Kaskade-S/T — Part 6 (RansomKaskade Part 1)1,186Jan. 22, 2018, 6:16 p.m.
New Year's Greetings — Part 4100Jan. 5, 2018, 1:20 a.m.
New Year's Greetings — Part 3100Jan. 5, 2018, 1:18 a.m.
New Year's Greetings — Part 2100Jan. 5, 2018, 1:13 a.m.
New Year's Greetings — Part 1100Jan. 5, 2018, 1:12 a.m.
Kaskade-S/T — Part 31,092Jan. 5, 2018, 1:10 a.m.
Advent Challenge — Part 32,000Dec. 22, 2017, 7:43 p.m.
Advent Challenge — Part 42,000Dec. 21, 2017, 7:56 p.m.
AES ECB Wrong Encoding1,824Dec. 18, 2017, 1:16 p.m.
Advent-Challenge — Part 22,000Dec. 17, 2017, 12:20 a.m.
Advent-Challenge — Part 1200Dec. 8, 2017, 8:26 p.m.
Number Sequence — Part 9200Nov. 16, 2017, 11:03 p.m.
ASAC — A Strong(er) ADFGVX Cipher — Part 11,613July 13, 2016, 8:55 p.m.
Image Noise200Nov. 21, 2015, 12:31 a.m.
News from Castle Mansfeld200Nov. 13, 2015, 7:34 p.m.
Weakened Granit — Part 1200Sept. 24, 2015, 4:01 p.m.
Number Sequence — Part 8200Sept. 14, 2015, 1:23 p.m.
Flawed Usage of a OTP Cipher by the BND1,576Aug. 28, 2015, 10:20 p.m.
Weakened Handycipher — Part 32,000May 13, 2015, 9:52 p.m.
Weakened Handycipher — Part 22,000May 13, 2015, 4 p.m.
Weakened Handycipher — Part 12,000May 13, 2015, 12:44 p.m.
A hidden word — Part 2200April 16, 2015, 7:50 p.m.
Number Sequence — Part 7200March 23, 2015, 9:51 p.m.
Number Sequence — Part 6200March 23, 2015, 6:34 p.m.
Ku Klux Klan1,000Feb. 9, 2015, 7:15 p.m.
Concealed Messages — Vigenère's Night Sky1,118Feb. 8, 2015, 11:55 p.m.
Monoalphabetic Substitution with Camouflage — Part 51,117Jan. 14, 2015, 7:29 p.m.
M-138 — Part 31,725Dec. 26, 2014, 3:32 a.m.
M-138 — Part 42,000Dec. 24, 2014, 12:41 p.m.
M-138 — Part 22,000Dec. 24, 2014, 8:23 a.m.
M-138 — Part 1200Dec. 24, 2014, 6:16 a.m.
The Last Note150Sept. 24, 2014, 1:28 a.m.
Heartbleed — Part 32,000Aug. 29, 2014, 11:41 a.m.
Heartbleed — Part 2200Aug. 29, 2014, 12:21 a.m.
Heartbleed — Part 1 200Aug. 28, 2014, 7:22 p.m.
Sigaba Part 11,109May 27, 2014, 12:23 a.m.
Double Column Transposition — Part 42,000May 20, 2014, 1:16 a.m.
ORYX Stream Cipher — Part 4a1,330May 15, 2014, 8:49 p.m.
Double Column Transposition — Part 22,000May 2, 2014, 9:43 p.m.
Double Column Transposition — Part 32,000May 2, 2014, 2:20 p.m.
Double Column Transposition — Part 11,423April 19, 2014, 4:35 a.m.
Spanish Strip Cipher — Part 11,824March 28, 2014, 9:39 p.m.
Enigma Messages with Repeated Letters — Part 3200March 6, 2014, 12:12 a.m.
Enigma Messages with Repeated Letters — Part 4200March 6, 2014, midnight
Enigma Messages with Repeated Letters — Part 5200March 5, 2014, 8:32 p.m.
Purple 11,115Nov. 2, 2013, 12:51 p.m.
Cascading Encryption — Part 3/31,183Nov. 1, 2013, 9:31 a.m.
Enigma Messages with Repeated Letters — Part 2200Oct. 29, 2013, 4:44 p.m.
Trifid Cipher200Oct. 29, 2013, 1:01 a.m.
Cascading Encryption — Part 2/31,185Oct. 18, 2013, 10:38 p.m.
A Secret Message from Castle Mansfeld100Oct. 16, 2013, 7:31 p.m.
Enigma Messages with Repeated Letters — Part 1200Sept. 26, 2013, 7:48 p.m.
Hill Cipher with Sudoku Key125Sept. 8, 2013, 3:12 p.m.
From Russia with Love200Sept. 4, 2013, 11:29 p.m.
Not-so-Secret Message from Malawi — Part II (ECC)1,117Aug. 17, 2013, 10:40 p.m.
Nils away on travel200Aug. 9, 2013, 10:04 a.m.
RSA with Special d13,661Aug. 1, 2013, 11:14 a.m.
ORYX Stream Cipher — Part 3 (revised)2,000June 7, 2013, 3:14 a.m.
Snow White and the seven dwarfs200April 20, 2013, 1:44 p.m.
Typex — Part 22,000April 4, 2013, 2:36 a.m.
Reserve Hand Procedure — Part 1200March 6, 2013, 11:14 p.m.
Typex — Part 11,725March 3, 2013, 1:19 a.m.
Multilingual Monoalphabetic Substitution125Feb. 2, 2013, 8:57 p.m.
Cascading Encryption — Part 1/3125Jan. 28, 2013, 11:40 p.m.
Enigma Messages200Jan. 24, 2013, 12:33 p.m.
Playfair with hints about the grid200Jan. 16, 2013, 9:05 p.m.
A hidden word200Jan. 6, 2013, 4:45 p.m.
Strange Message from Thessaloniki200Dec. 11, 2012, 5:49 a.m.
Unusual encryption using a diophantine equation1,147Dec. 8, 2012, 6:06 p.m.
Recycled One-Time Pad114Nov. 26, 2012, 7:21 p.m.
AES key — encoded in the machine readable zone of a European ePassport1,165Nov. 19, 2012, 2:25 p.m.
CMEA 213,846Nov. 17, 2012, 3:01 p.m.
CMEA 11,130Nov. 15, 2012, 10:14 a.m.
Music Code — Part 21,141Nov. 3, 2012, 12:10 p.m.
A really long number sequence1,151Nov. 2, 2012, 10:52 p.m.
Music Code — Part 1100Oct. 19, 2012, 1:45 a.m.
Smartcard RSA1,130Oct. 10, 2012, 11:05 p.m.
Letter to the Templars — Part 32,000Oct. 9, 2012, 4:42 p.m.
Zodiac Cipher100Oct. 7, 2012, 10:47 p.m.
Turing Bombe Enigma I100Oct. 4, 2012, 5:25 p.m.
Enigma Combinatorics100Sept. 25, 2012, midnight
BCR code (Book-Caesar-RSA)1,456Sept. 23, 2012, 9:46 p.m.
Beaver Code200Aug. 13, 2012, 8:37 p.m.
Monoalphabetic substitution with camouflage — Part 1100Aug. 1, 2012, 12:16 a.m.
Letter to the Templars — Part 2200July 30, 2012, 8:40 p.m.
Letter to the Templars — Part 1200July 16, 2012, 10:59 p.m.
Monoalphabetic substitution with camouflage — Part 31,184July 6, 2012, 12:33 p.m.
Monoalphabetic substitution with camouflage — Part 21,185July 4, 2012, 1:01 a.m.
Monoalphabetic substitution with camouflage — Part 4101July 1, 2012, 12:45 a.m.
Pigpen with a twist — Part 31,168June 21, 2012, 9:38 p.m.
Pigpen with a twist — Part 21,171June 3, 2012, 11:37 p.m.
Playfair Encryption100June 1, 2012, 1:34 a.m.
Pigpen with a twist — Part 1100June 1, 2012, 12:22 a.m.
How do you become a big cryptographer?200May 29, 2012, 1:44 a.m.
Keyshanc — Part 22,000May 22, 2012, 7:38 p.m.
Keyshanc — Part 12,000May 22, 2012, 2:27 p.m.
ECDH-Key Exchange for Beginners101May 11, 2012, 12:40 a.m.
¿No Hablas Español? No problemo!105May 8, 2012, 10:25 p.m.
ORYX Stream Cipher Part II1,139April 28, 2012, 12:41 p.m.
ORYX Stream Cipher Part I1,139April 27, 2012, 10:46 p.m.
Lunchtime Attack on the Fully Homomorphic Encryption Scheme1,146April 25, 2012, 5:17 p.m.
Number Sequence — Part 4114April 25, 2012, 8:36 a.m.
Modified Caesar Cipher100April 16, 2012, 11:24 p.m.
Cracking SHA1-Hashed Passwords1,156April 14, 2012, 7:16 a.m.
Brute-Force-Attack on Triple-DES with Reduced Key Space1,140April 13, 2012, 9:12 p.m.
Number Sequence — Part 3108April 11, 2012, 4:34 p.m.
Unconcealed RSA messages1,200April 11, 2012, 12:48 a.m.
Enigma Part 21,140April 7, 2012, 5:10 p.m.
Enigma Part 11,141April 6, 2012, 5:42 p.m.
Partial Key Exposure with RSA — Part 11,279April 5, 2012, 1:18 p.m.
Hybrid Encryption I1,142April 4, 2012, 1:17 a.m.
Not-so-Secret Message from Malawi — Part I (RSA)1,141April 3, 2012, 5:31 p.m.
Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1100April 3, 2012, 12:39 p.m.
An Invisible Message101April 1, 2012, 8:52 p.m.
Broadcasting and low exponent — RSA Attack1,175March 29, 2012, 10:19 a.m.
Alice's Birthday Party (Part 1)1,141March 29, 2012, 1:09 a.m.
RSA: Two different keys — same ciphertext1,181March 28, 2012, 1:14 p.m.
Alice's Birthday Party (Part 2)1,141March 27, 2012, 1:52 a.m.
Factorization Cipher — Part 31,249March 24, 2012, 12:59 a.m.
Factorization Cipher — Part 21,222March 22, 2012, 9:19 p.m.
The Book Code: A Challenge for Bookworms200March 21, 2012, 6:40 p.m.
Classical Ciphers^3100March 19, 2012, 1:46 a.m.
Molehunt (Part 3/3)1,143March 18, 2012, 9:23 p.m.
Molehunt (Part 2/3)100March 16, 2012, 10:47 p.m.
Molehunt (Part 1/3)100March 16, 2012, 9:51 p.m.
Kaskade-S/T — Part 21,156March 15, 2012, 7:48 p.m.
Kaskade-S/T — Part 1100March 14, 2012, 1:54 p.m.
Double Columnar Transposition101March 13, 2012, 7:08 p.m.
A modified homophonic cipher with reduced alphabets — Part 2100March 11, 2012, 12:52 a.m.
A modified homophonic cipher with reduced alphabets — Part 1100March 10, 2012, 1:15 a.m.
ADFGVX — Part 1100March 8, 2012, 5:34 p.m.
ADFGVX — Part 2100March 7, 2012, 8:54 p.m.
One-Time Pad with Flaws100March 6, 2012, 7:22 p.m.
Affine Codes / Modulo Arithmetic with N / Extended Euclid101March 6, 2012, 3:49 p.m.
Letter from the Alleged Countess Julie von Ortenburg100March 6, 2012, 2:48 p.m.
Grille Cipher101March 6, 2012, 12:50 a.m.
Factorization Cipher — Part 1101March 5, 2012, 11:08 p.m.
Monoalphabetic Substitution100March 5, 2012, 9:49 p.m.
Number Sequence100March 5, 2012, 9:46 p.m.
Caesar Encryption100March 5, 2012, 9:45 p.m.
Original Caesar Cipher100March 5, 2012, 9:42 p.m.
Number Sequence — Part 2100March 5, 2012, 9:40 p.m.

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