Account

Name
Bart den Hartog
Username
Bart13
Joined
Nov. 1, 2011, 10:41 a.m.

Rank
13
Points
150,540
Trophies
Gold7
Silver7
Bronze4

Active Challenges (1)

LevelNameAttemptsDate
Handycipher — Part 11 / 15March 28, 2015, 2:22 a.m.

Solved Challenges (175)

LevelNamePointsDate
Wheatstone Cryptograph — Part 21,203Oct. 21, 2021, 2:17 p.m.
Wheatstone Cryptograph — Part 1101Oct. 16, 2021, 4:22 a.m.
Find the right route — Part 3100Sept. 24, 2021, 2:29 a.m.
Find the right route — Part 2100Sept. 23, 2021, 11:22 p.m.
Find the right route — Part 1100Sept. 23, 2021, 9:33 p.m.
Polyphonic Substitution Cipher — Part 11,725Nov. 23, 2019, 3:02 p.m.
AES ECB Wrong Encoding1,130Nov. 20, 2019, 1:25 p.m.
Cipher ID — Part 12,000Nov. 19, 2019, 1:05 p.m.
Hilly — Part 11,119Sept. 19, 2019, 7:08 a.m.
Double Column Transposition — Part 51,099Sept. 12, 2019, 5:27 p.m.
Monoalphabetic Substitution with Nostradamus Flavor1,185Sept. 11, 2019, 6:27 p.m.
A Cloaked Substitution Cipher — Part 21,502Sept. 3, 2019, 8:22 a.m.
A Cloaked Substitution Cipher — Part 11,725Aug. 24, 2019, 12:59 a.m.
Handycipher made in love — Part 21,244Aug. 11, 2019, 11:04 p.m.
Breaking a Filter Generator1,164Aug. 6, 2019, 4:56 p.m.
Handycipher made in love — Part 11,199July 29, 2019, 5:55 a.m.
The T52 Sturgeon Challenge — Part 11,444July 26, 2019, 4:40 p.m.
Homophonic Encryption — Part 41,251July 23, 2019, 2:41 a.m.
Homophonic Encryption — Part 31,251July 23, 2019, 1:31 a.m.
Homophonic Encryption — Part 21,251July 23, 2019, 12:42 a.m.
Homophonic Encryption — Part 11,247July 22, 2019, 11:32 p.m.
Fastest in the West1,153July 22, 2019, 9:37 p.m.
Trendy Messenger1,153July 22, 2019, 5:30 p.m.
RSA Factoring Challenge: RSA-2300July 22, 2019, 12:28 p.m.
Modular Sequences100July 22, 2019, 5:03 a.m.
Advent Challenge — Part 41,138July 17, 2019, 5:45 p.m.
Advent Challenge — Part 31,138July 17, 2019, 3:37 a.m.
Advent-Challenge — Part 21,138July 17, 2019, 2:45 a.m.
Summer Job1,153July 16, 2019, 5:21 a.m.
The Einstein Enigma1,142July 16, 2019, 3:33 a.m.
Number Sequence — Part 10100July 16, 2019, 1:09 a.m.
Cryptanalysis Hacking Puzzles — Part 2101July 16, 2019, 12:48 a.m.
Autokey Cipher100July 15, 2019, 11:54 p.m.
Advent-Challenge — Part 1117Dec. 14, 2017, 7:02 p.m.
ASAC — A Strong(er) ADFGVX Cipher — Part 11,143Nov. 29, 2017, 12:40 a.m.
Number Sequence — Part 9114Nov. 23, 2017, 1:22 p.m.
Holographic Encryption — Part 11,198Sept. 20, 2017, 3:18 a.m.
M-138 — Part 41,127Jan. 31, 2017, 2:56 p.m.
RSA Factoring Challenge: RSA-2200Jan. 25, 2017, 7:34 p.m.
New Year's Greetings — Part 4101June 28, 2016, 12:29 a.m.
New Year's Greetings — Part 3101June 28, 2016, 12:25 a.m.
New Year's Greetings — Part 2101June 28, 2016, 12:18 a.m.
New Year's Greetings — Part 1101June 28, 2016, 12:02 a.m.
News from Castle Mansfeld111Nov. 21, 2015, 7:34 p.m.
Image Noise200Nov. 21, 2015, 2:53 p.m.
Weakened Granit — Part 1200Sept. 24, 2015, 11:19 p.m.
Number Sequence — Part 8200Sept. 14, 2015, 4:31 p.m.
Flawed Usage of a OTP Cipher by the BND1,398Sept. 10, 2015, 2:30 p.m.
Number Sequence — Part 7101Sept. 10, 2015, 7 a.m.
A hidden word — Part 2150April 17, 2015, 10:31 p.m.
Number Sequence — Part 6120March 28, 2015, 1:58 a.m.
M-138 — Part 32,000Dec. 24, 2014, 9:59 a.m.
M-138 — Part 22,000Dec. 24, 2014, 3:37 a.m.
M-138 — Part 1200Dec. 24, 2014, 1:44 a.m.
The Last Note200Sept. 23, 2014, 2:55 p.m.
Heartbleed — Part 31,547Sept. 4, 2014, 12:54 a.m.
Heartbleed — Part 2117Sept. 2, 2014, 4:24 p.m.
Heartbleed — Part 1 125Sept. 1, 2014, 10:39 a.m.
CMEA 213,551June 4, 2014, 12:37 p.m.
Cascading Encryption — Part 3/31,150June 2, 2014, 2:03 a.m.
Cascading Encryption — Part 2/31,150June 1, 2014, 11:10 a.m.
Double Column Transposition — Part 31,367May 25, 2014, 1:26 a.m.
Double Column Transposition — Part 11,284May 25, 2014, 1:07 a.m.
Double Column Transposition — Part 42,000May 20, 2014, 5:13 a.m.
Purple 11,110May 20, 2014, 1:08 a.m.
Double Column Transposition — Part 21,469May 12, 2014, 10:43 p.m.
RSA Factoring Challenge: RSA-2100April 23, 2014, 4:20 p.m.
RSA Factoring Challenge: RSA-7040April 23, 2014, 4:10 p.m.
ORYX Stream Cipher — Part 3 (revised)1,163April 22, 2014, 11:36 p.m.
Spanish Strip Cipher — Part 21,660March 31, 2014, 11:26 a.m.
Spanish Strip Cipher — Part 11,660March 31, 2014, 5:04 a.m.
Enigma Messages with Repeated Letters — Part 5133March 8, 2014, 1:05 a.m.
Enigma Messages with Repeated Letters — Part 4133March 8, 2014, 12:38 a.m.
Enigma Messages with Repeated Letters — Part 3133March 8, 2014, 12:26 a.m.
Akelarre Part 11,115Dec. 14, 2013, 2:10 a.m.
Enigma Messages with Repeated Letters — Part 2107Nov. 11, 2013, 10:48 p.m.
Trifid Cipher150Oct. 30, 2013, 7:22 p.m.
Kaskade-S/T — Part 51,122Oct. 7, 2013, 5:34 a.m.
Typex — Part 21,193Oct. 2, 2013, 12:16 a.m.
Typex — Part 11,184Oct. 1, 2013, 1:01 a.m.
Enigma Messages with Repeated Letters — Part 1133Sept. 29, 2013, 2:39 a.m.
Multilingual Monoalphabetic Substitution100Sept. 14, 2013, 4:06 p.m.
Hill Cipher with Sudoku Key111Sept. 12, 2013, 11:07 p.m.
From Russia with Love117Sept. 9, 2013, 6:38 p.m.
Nils away on travel200Aug. 9, 2013, 11:09 a.m.
Snow White and the seven dwarfs150April 21, 2013, 11:05 p.m.
Reserve Hand Procedure — Part 1200March 7, 2013, 12:59 a.m.
CMEA 11,126Feb. 1, 2013, 1:07 a.m.
Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 21,133Jan. 27, 2013, 11:02 p.m.
Cascading Encryption — Part 1/3200Jan. 25, 2013, 8:50 p.m.
Enigma Messages150Jan. 24, 2013, 4:40 p.m.
Playfair with hints about the grid200Jan. 17, 2013, 11 a.m.
A hidden word200Jan. 6, 2013, 3:42 p.m.
Concealed Messages — Vigenère's Night Sky1,179Dec. 21, 2012, 1:17 a.m.
Strange Message from Thessaloniki200Dec. 11, 2012, 12:52 a.m.
Recycled One-Time Pad114Nov. 27, 2012, 3:02 a.m.
Kaskade-S/T — Part 31,135Nov. 23, 2012, 3:57 a.m.
Zodiac Cipher100Nov. 21, 2012, 12:10 p.m.
Letter to the Templars — Part 32,000Oct. 9, 2012, 4:24 p.m.
BCR code (Book-Caesar-RSA)1,824Sept. 14, 2012, 10:58 a.m.
Beaver Code200Aug. 14, 2012, 12:23 a.m.
Letter to the Templars — Part 2120Aug. 3, 2012, 9:39 p.m.
RSA with Special d13,897July 23, 2012, 9:45 a.m.
Unconcealed RSA messages1,174July 18, 2012, 9:16 p.m.
Not-so-Secret Message from Malawi — Part II (ECC)1,134July 17, 2012, 1:35 p.m.
Letter to the Templars — Part 1200July 17, 2012, 2:19 a.m.
Enigma Part 21,134July 12, 2012, 3:20 a.m.
Lattice Part 11,145July 11, 2012, 8:12 p.m.
An 'unhearable' message150June 6, 2012, 11:58 p.m.
How do you become a big cryptographer?200May 29, 2012, 1:45 a.m.
Keyshanc — Part 21,725May 24, 2012, 11:54 a.m.
Keyshanc — Part 11,725May 24, 2012, 11:12 a.m.
Number Sequence — Part 5114April 24, 2012, 10:52 p.m.
Number Sequence — Part 4114April 24, 2012, 10:50 p.m.
AES key — encoded in the machine readable zone of a European ePassport1,234April 20, 2012, 8:30 p.m.
Pigpen with a twist — Part 31,180April 19, 2012, 12:19 p.m.
Pigpen with a twist — Part 21,180April 19, 2012, 12:01 p.m.
Number Sequence — Part 3150April 1, 2012, 1:37 a.m.
Monoalphabetic Substitution with Camouflage — Part 51,378March 30, 2012, 11:45 a.m.
The Book Code: A Challenge for Bookworms150March 22, 2012, 11:24 a.m.
Smartcard RSA1,145Feb. 26, 2012, 1:17 a.m.
ORYX Stream Cipher Part II1,144Feb. 25, 2012, 5:40 a.m.
ECDH-Key Exchange for Beginners200Feb. 24, 2012, 5:01 a.m.
ORYX Stream Cipher Part I1,144Feb. 24, 2012, 2:11 a.m.
Music Code — Part 21,171Feb. 14, 2012, 12:10 a.m.
Music Code — Part 1100Feb. 14, 2012, 12:08 a.m.
Partial Key Exposure with RSA — Part 12,000Feb. 11, 2012, 1:23 p.m.
Ku Klux Klan1,000Feb. 10, 2012, 6:45 p.m.
A really long number sequence1,203Feb. 5, 2012, 2:32 p.m.
Unusual encryption using a diophantine equation1,202Feb. 5, 2012, 2:46 a.m.
Playfair Encryption100Jan. 31, 2012, 12:55 a.m.
Factorization Cipher — Part 31,824Jan. 8, 2012, 9:32 a.m.
Lunchtime Attack on the Fully Homomorphic Encryption Scheme1,160Dec. 26, 2011, 6:49 p.m.
Monoalphabetic substitution with camouflage — Part 4200Dec. 22, 2011, 1:18 p.m.
Kaskade-S/T — Part 21,169Dec. 14, 2011, 4:38 p.m.
Enigma Part 11,151Dec. 12, 2011, 9:11 p.m.
Monoalphabetic substitution with camouflage — Part 21,824Dec. 8, 2011, 9:15 p.m.
Monoalphabetic substitution with camouflage — Part 31,824Dec. 8, 2011, 5:06 p.m.
Pigpen with a twist — Part 1101Dec. 8, 2011, 1:19 a.m.
RSA: Two different keys — same ciphertext1,222Dec. 7, 2011, 3:44 p.m.
Molehunt (Part 3/3)1,152Dec. 5, 2011, 10:14 p.m.
Factorization Cipher — Part 21,660Dec. 5, 2011, 11:14 a.m.
Double Columnar Transposition102Nov. 30, 2011, 1:04 a.m.
Cracking SHA1-Hashed Passwords1,178Nov. 28, 2011, 1:12 p.m.
Hybrid Encryption I1,154Nov. 28, 2011, 12:38 a.m.
Brute-Force-Attack on Triple-DES with Reduced Key Space1,152Nov. 27, 2011, 9:31 p.m.
Broadcasting and low exponent — RSA Attack1,219Nov. 18, 2011, 3:55 a.m.
Not-so-Secret Message from Malawi — Part I (RSA)1,153Nov. 18, 2011, 2:34 a.m.
Alice's Birthday Party (Part 2)1,153Nov. 16, 2011, 2:55 a.m.
Alice's Birthday Party (Part 1)1,154Nov. 14, 2011, 11:50 p.m.
An Invisible Message103Nov. 14, 2011, 8:37 p.m.
Turing Bombe Enigma I104Nov. 9, 2011, 1:51 a.m.
ADFGVX — Part 2101Nov. 9, 2011, 12:49 a.m.
ADFGVX — Part 1101Nov. 8, 2011, 6:36 a.m.
Classical Ciphers^3100Nov. 8, 2011, 5:44 a.m.
Molehunt (Part 2/3)100Nov. 8, 2011, 1:25 a.m.
A Secret Message from Castle Mansfeld100Nov. 5, 2011, 5:52 p.m.
Factorization Cipher — Part 1105Nov. 4, 2011, 11:17 p.m.
Modified Caesar Cipher102Nov. 4, 2011, 4:13 p.m.
Enigma Combinatorics100Nov. 4, 2011, 1:51 a.m.
Grille Cipher105Nov. 4, 2011, 12:27 a.m.
Molehunt (Part 1/3)100Nov. 3, 2011, 9:02 p.m.
Kaskade-S/T — Part 1100Nov. 3, 2011, 5:36 p.m.
Affine Codes / Modulo Arithmetic with N / Extended Euclid102Nov. 2, 2011, 6:01 p.m.
Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1100Nov. 2, 2011, 3:19 a.m.
Letter from the Alleged Countess Julie von Ortenburg100Nov. 2, 2011, 1:56 a.m.
One-Time Pad with Flaws100Nov. 1, 2011, 10:51 p.m.
A modified homophonic cipher with reduced alphabets — Part 2100Nov. 1, 2011, 9:23 p.m.
Monoalphabetic substitution with camouflage — Part 1117Nov. 1, 2011, 7:39 p.m.
Number Sequence — Part 2101Nov. 1, 2011, 2:27 p.m.
Original Caesar Cipher100Nov. 1, 2011, 2:25 p.m.
Caesar Encryption100Nov. 1, 2011, 2:23 p.m.
A modified homophonic cipher with reduced alphabets — Part 1100Nov. 1, 2011, 2:10 p.m.
Monoalphabetic Substitution100Nov. 1, 2011, 2:06 p.m.
Number Sequence100Nov. 1, 2011, 12:48 p.m.

Submitted Challenges (1)

LevelNameDate
¿No Hablas Español? No problemo!April 18, 2012, 7:19 p.m.

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