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Name

Alain Collignon

Username

vexilla72

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Sept. 28, 2015, 12:36 p.m.

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139,384

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Active Challenges (3)

Name	Attempts	Date
A really long number sequence	3 / 40	July 4, 2021, 7:48 p.m.
Cipher ID — Part 1	4 / 20	Nov. 20, 2019, 12:23 p.m.
Enigma Combinatorics	6 / 20	Sept. 19, 2019, 1:16 p.m.

Solved Challenges (186)

Name	Points	Date
The Josse Challenge – Part 3	1,210	Aug. 11, 2023, 6:15 a.m.
The Hutton Cipher – Part 2	1,265	Aug. 8, 2023, 7:08 a.m.
The Hutton Cipher – Part 1	1,234	Aug. 6, 2023, 7:24 a.m.
The Josse Challenge – Part 2	1,725	Feb. 27, 2023, 9:47 a.m.
The Josse Challenge – Part 1	1,469	Feb. 21, 2023, 8:15 a.m.
The Syllabary Cipher – Part 4	1,318	Dec. 2, 2022, 10:42 p.m.
The Syllabary Cipher – Part 5	1,318	Dec. 2, 2022, 7:58 p.m.
The Syllabary Cipher – Part 3	1,353	Nov. 22, 2022, 10 p.m.
The Syllabary Cipher – Part 2	1,547	Nov. 4, 2022, 9:38 a.m.
The Syllabary Cipher – Part 1	200	Oct. 28, 2022, 2:44 p.m.
Merkle-Hellman Knapsack Challenge - Part 1	125	Oct. 18, 2022, 9:19 a.m.
Alberti Challenge — Part 1	150	March 28, 2022, 9:09 a.m.
Find the right route — Part 3	100	Feb. 1, 2022, 12:59 p.m.
Modified Vigenère Cipher	1,613	Jan. 28, 2022, 9:04 p.m.
M-138 — Part 4	1,091	Jan. 27, 2022, 5:31 p.m.
Wheatstone Cryptograph — Part 1	200	April 22, 2021, 3:14 p.m.
Purple 1	1,082	Feb. 18, 2021, 11:43 a.m.
Find the right route — Part 1	113	Nov. 3, 2020, 8:09 p.m.
Polyhomophonic Substitution — Part 3	1,199	Sept. 16, 2020, 8:49 a.m.
Polyphonic Substitution Cipher — Part 2	1,177	Sept. 14, 2020, 1:19 a.m.
Polyphonic Substitution Cipher — Part 1	1,169	Sept. 3, 2020, 11:31 a.m.
Lightweight Introduction to Lattices — Part 3	1,824	July 17, 2020, 6:39 p.m.
RSA Factoring Challenge: RSA-250	0	July 13, 2020, 4:19 p.m.
RSA Factoring Challenge: RSA-704	0	July 9, 2020, 8:01 a.m.
RSA Factoring Challenge: RSA-240	0	July 9, 2020, 7:54 a.m.
RSA Factoring Challenge: RSA-232	0	July 9, 2020, 7:48 a.m.
RSA Factoring Challenge: RSA-230	0	July 9, 2020, 7:44 a.m.
RSA Factoring Challenge: RSA-220	0	July 9, 2020, 7:41 a.m.
RSA Factoring Challenge: RSA-210	0	July 9, 2020, 7:24 a.m.
Number Sequence — Part 9	100	June 26, 2020, 10:48 a.m.
Lightweight Introduction to Lattices — Part 2	200	June 24, 2020, 12:58 p.m.
Lightweight Introduction to Lattices — Part 1	108	May 28, 2020, 1:30 p.m.
Polyhomophonic Substitution — Part 2	2,000	March 28, 2020, 11:11 p.m.
Polyhomophonic Substitution — Part 1	200	March 22, 2020, 7:51 p.m.
The LoRa Cipher: Logic Randomness — Part 1	2,000	Feb. 20, 2020, 8:50 a.m.
Sigaba Part 1	1,084	Feb. 12, 2020, 6:24 p.m.
CMEA 2	13,127	Jan. 4, 2020, 3:44 p.m.
Homophonic Encryption — Part 4	1,180	Dec. 22, 2019, 12:16 p.m.
The T52 Sturgeon Challenge — Part 4	1,256	Oct. 1, 2019, 6:59 p.m.
The T52 Sturgeon Challenge — Part 3	1,256	Oct. 1, 2019, 2:41 p.m.
The T52 Sturgeon Challenge — Part 2	1,256	Oct. 1, 2019, 11:47 a.m.
The T52 Sturgeon Challenge — Part 1	1,247	Oct. 1, 2019, 11:45 a.m.
Unusual encryption using a diophantine equation	1,088	Sept. 21, 2019, 8:55 p.m.
A Cloaked Substitution Cipher — Part 1	1,444	Sept. 2, 2019, 3:05 p.m.
A Cloaked Substitution Cipher — Part 2	1,523	Sept. 2, 2019, 11:16 a.m.
Handycipher made in love — Part 2	2,000	May 22, 2019, 11:15 a.m.
Homophonic Encryption — Part 2	1,725	May 10, 2019, 11:47 p.m.
Homophonic Encryption — Part 3	2,000	May 9, 2019, 10:44 a.m.
Homophonic Encryption — Part 1	1,824	May 6, 2019, 11:43 a.m.
Number Sequence — Part 5	100	April 3, 2019, 4:50 p.m.
Typex — Part 1	1,095	March 5, 2019, 8:37 a.m.
Monoalphabetic Substitution with Nostradamus Flavor	2,000	Feb. 16, 2019, 11:07 p.m.
Handycipher made in love — Part 1	2,000	Feb. 16, 2019, 10:05 p.m.
Cryptanalysis Hacking Puzzles — Part 2	200	Jan. 10, 2019, 8 a.m.
Kaskade-S/T — Part 6 (RansomKaskade Part 1)	1,142	Dec. 2, 2018, 8 p.m.
Cryptanalysis Hacking Puzzles — Part 1	111	Nov. 4, 2018, 11:04 a.m.
Breaking a Filter Generator	1,660	Sept. 28, 2018, 4:19 p.m.
Modular Sequences	150	Sept. 27, 2018, 12:26 p.m.
Autokey Cipher	150	Sept. 27, 2018, 11:05 a.m.
Typex — Part 2	1,098	Aug. 23, 2018, 12:17 p.m.
Ku Klux Klan	1,000	Aug. 13, 2018, 2:59 p.m.
Hilly — Part 1	1,141	July 14, 2018, 9:53 a.m.
Trendy Messenger	1,547	June 19, 2018, 7:44 a.m.
Summer Job	1,824	June 13, 2018, 3:53 p.m.
Fastest in the West	2,000	June 13, 2018, 10:36 a.m.
An Invisible Message	100	June 9, 2018, 9:14 a.m.
Number Sequence — Part 10	102	June 7, 2018, 4:49 p.m.
Monoalphabetic Substitution with Camouflage — Part 5	1,095	March 13, 2018, 2:44 p.m.
Monoalphabetic substitution with camouflage — Part 3	1,094	March 12, 2018, 7:42 p.m.
Monoalphabetic substitution with camouflage — Part 2	1,094	March 12, 2018, 10:58 a.m.
The Einstein Enigma	1,824	Feb. 9, 2018, 7:29 a.m.
An 'unhearable' message	100	Feb. 8, 2018, 7:53 p.m.
Advent Challenge — Part 3	2,000	Dec. 22, 2017, 7:34 p.m.
Advent Challenge — Part 4	2,000	Dec. 22, 2017, 8:16 a.m.
Advent-Challenge — Part 2	2,000	Dec. 17, 2017, 11:20 a.m.
Advent-Challenge — Part 1	150	Dec. 10, 2017, 9:25 a.m.
Monoalphabetic substitution with camouflage — Part 1	100	Dec. 8, 2017, 5:53 p.m.
New Year's Greetings — Part 4	100	Nov. 8, 2017, 8:15 a.m.
New Year's Greetings — Part 3	100	Nov. 8, 2017, 7:56 a.m.
New Year's Greetings — Part 2	100	Nov. 8, 2017, 7:48 a.m.
New Year's Greetings — Part 1	100	Nov. 8, 2017, 7:35 a.m.
Image Noise	100	June 14, 2017, 10:26 a.m.
Turing Bombe Enigma I	100	June 9, 2017, 4:42 p.m.
Kaskade-S/T — Part 3	1,094	June 1, 2017, 3:56 p.m.
Spanish Strip Cipher — Part 2	1,114	May 17, 2017, 10:36 a.m.
CMEA 1	1,095	Dec. 11, 2016, 10:37 a.m.
ASAC — A Strong(er) ADFGVX Cipher — Part 1	1,204	Dec. 6, 2016, 4:18 p.m.
Monoalphabetic substitution with camouflage — Part 4	100	Nov. 22, 2016, 8:25 p.m.
Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1	100	Nov. 17, 2016, 8:22 p.m.
Strange Message from Thessaloniki	100	Nov. 17, 2016, 11:39 a.m.
Music Code — Part 1	100	Nov. 16, 2016, 3:45 p.m.
Music Code — Part 2	1,097	Nov. 16, 2016, 3:32 p.m.
Number Sequence — Part 7	100	Nov. 9, 2016, 12:19 p.m.
Kaskade-S/T — Part 2	1,097	Nov. 7, 2016, 10:11 a.m.
Molehunt (Part 3/3)	1,095	Nov. 5, 2016, 9:47 a.m.
Zodiac Cipher	100	Nov. 5, 2016, 9:07 a.m.
Snow White and the seven dwarfs	100	Oct. 24, 2016, 5:59 p.m.
Heartbleed — Part 1	100	Oct. 22, 2016, 10:23 a.m.
Weakened Granit — Part 1	100	Oct. 19, 2016, 7:46 a.m.
Double Column Transposition — Part 1	1,121	Oct. 17, 2016, 2:47 p.m.
Double Column Transposition — Part 2	1,122	Oct. 17, 2016, 2:35 p.m.
Double Column Transposition — Part 3	1,122	Oct. 17, 2016, 12:45 p.m.
M-138 — Part 3	1,133	Oct. 16, 2016, 7:29 a.m.
Flawed Usage of a OTP Cipher by the BND	1,152	Oct. 10, 2016, 6:28 p.m.
Brute-Force-Attack on Triple-DES with Reduced Key Space	1,095	Oct. 8, 2016, 1:14 p.m.
A hidden word — Part 2	100	Sept. 30, 2016, 6:28 p.m.
Nils away on travel	100	Sept. 30, 2016, 6:07 p.m.
Recycled One-Time Pad	100	Sept. 27, 2016, 12:02 p.m.
Molehunt (Part 1/3)	100	March 21, 2016, 9:39 a.m.
Letter from the Alleged Countess Julie von Ortenburg	100	March 16, 2016, 6:30 p.m.
Unconcealed RSA messages	1,104	March 11, 2016, 6:27 p.m.
Hill Cipher with Sudoku Key	100	March 8, 2016, 11:48 a.m.
Keyshanc — Part 2	1,108	March 4, 2016, 5:46 p.m.
Keyshanc — Part 1	1,108	March 3, 2016, 10:40 a.m.
The Last Note	100	Feb. 29, 2016, 7:46 p.m.
Cascading Encryption — Part 1/3	100	Feb. 22, 2016, 3:21 p.m.
How do you become a big cryptographer?	100	Feb. 5, 2016, 7:26 p.m.
News from Castle Mansfeld	101	Feb. 5, 2016, 7:06 p.m.
A Secret Message from Castle Mansfeld	100	Feb. 5, 2016, 5:33 p.m.
Lunchtime Attack on the Fully Homomorphic Encryption Scheme	1,100	Jan. 29, 2016, 2:41 p.m.
Enigma Messages with Repeated Letters — Part 5	100	Jan. 16, 2016, 4:38 p.m.
Enigma Messages with Repeated Letters — Part 4	100	Jan. 16, 2016, 4:34 p.m.
Enigma Messages with Repeated Letters — Part 2	100	Jan. 15, 2016, 5:59 p.m.
Enigma Messages with Repeated Letters — Part 3	100	Jan. 12, 2016, 7:51 p.m.
Double Column Transposition — Part 4	1,136	Jan. 12, 2016, 7:07 p.m.
Enigma Messages	100	Jan. 12, 2016, 12:25 p.m.
Enigma Part 1	1,099	Jan. 12, 2016, 11:30 a.m.
Enigma Part 2	1,099	Jan. 12, 2016, 11:01 a.m.
Enigma Messages with Repeated Letters — Part 1	100	Jan. 9, 2016, 2:24 p.m.
ORYX Stream Cipher — Part 3 (revised)	1,121	Dec. 17, 2015, 7:31 p.m.
ORYX Stream Cipher Part II	1,099	Dec. 13, 2015, 10:14 a.m.
ORYX Stream Cipher Part I	1,099	Dec. 11, 2015, 12:53 p.m.
Hybrid Encryption I	1,100	Nov. 23, 2015, 2:03 p.m.
Pigpen with a twist — Part 2	1,105	Nov. 19, 2015, 6:50 p.m.
Partial Key Exposure with RSA — Part 1	1,108	Nov. 18, 2015, 10 a.m.
Pigpen with a twist — Part 3	1,105	Nov. 17, 2015, 2:36 p.m.
Monoalphabetic Substitution	100	Nov. 15, 2015, 7:58 a.m.
Playfair with hints about the grid	100	Nov. 13, 2015, 7:47 a.m.
Playfair Encryption	100	Nov. 13, 2015, 7:37 a.m.
AES key — encoded in the machine readable zone of a European ePassport	1,108	Nov. 9, 2015, 3:48 p.m.
Molehunt (Part 2/3)	100	Nov. 6, 2015, 4:55 p.m.
Factorization Cipher — Part 2	1,107	Nov. 6, 2015, 9:16 a.m.
Factorization Cipher — Part 3	1,108	Nov. 6, 2015, 8:33 a.m.
Double Columnar Transposition	100	Nov. 3, 2015, 9:25 a.m.
ECDH-Key Exchange for Beginners	100	Nov. 3, 2015, 6:03 a.m.
M-138 — Part 2	1,164	Nov. 2, 2015, 7:42 a.m.
RSA: Two different keys — same ciphertext	1,105	Oct. 30, 2015, 5:47 p.m.
Broadcasting and low exponent — RSA Attack	1,104	Oct. 30, 2015, 5:18 p.m.
Not-so-Secret Message from Malawi — Part I (RSA)	1,100	Oct. 30, 2015, 4:40 p.m.
BCR code (Book-Caesar-RSA)	1,114	Oct. 30, 2015, 3:35 p.m.
Spanish Strip Cipher — Part 1	1,139	Oct. 14, 2015, 7:49 p.m.
Classical Ciphers^3	100	Oct. 12, 2015, 9:07 a.m.
ADFGVX — Part 1	100	Oct. 11, 2015, 2:17 p.m.
ADFGVX — Part 2	100	Oct. 11, 2015, 1:35 p.m.
Alice's Birthday Party (Part 1)	1,100	Oct. 8, 2015, 12:24 p.m.
Alice's Birthday Party (Part 2)	1,100	Oct. 8, 2015, 11:07 a.m.
A modified homophonic cipher with reduced alphabets — Part 1	100	Oct. 7, 2015, 6:29 p.m.
A modified homophonic cipher with reduced alphabets — Part 2	100	Oct. 7, 2015, 6:21 p.m.
Trifid Cipher	100	Oct. 7, 2015, 11:50 a.m.
Pigpen with a twist — Part 1	100	Oct. 7, 2015, 7:13 a.m.
Kaskade-S/T — Part 1	100	Oct. 6, 2015, 7:31 p.m.
Beaver Code	100	Oct. 5, 2015, 2:04 p.m.
A hidden word	100	Oct. 3, 2015, 5:46 a.m.
Multilingual Monoalphabetic Substitution	100	Oct. 2, 2015, 4:06 p.m.
Number Sequence — Part 8	105	Oct. 2, 2015, 2:23 p.m.
Number Sequence — Part 6	101	Oct. 2, 2015, 2:17 p.m.
From Russia with Love	100	Oct. 1, 2015, 4:13 p.m.
The Book Code: A Challenge for Bookworms	100	Oct. 1, 2015, 3:37 p.m.
One-Time Pad with Flaws	100	Oct. 1, 2015, 6:04 a.m.
M-138 — Part 1	100	Sept. 30, 2015, 10:13 a.m.
Reserve Hand Procedure — Part 1	100	Sept. 30, 2015, 8 a.m.
¿No Hablas Español? No problemo!	100	Sept. 30, 2015, 5:48 a.m.
Grille Cipher	100	Sept. 29, 2015, 3:06 p.m.
Cracking SHA1-Hashed Passwords	1,103	Sept. 29, 2015, 2:03 p.m.
Letter to the Templars — Part 3	1,116	Sept. 29, 2015, 9:40 a.m.
Modified Caesar Cipher	100	Sept. 29, 2015, 9:25 a.m.
Factorization Cipher — Part 1	100	Sept. 28, 2015, 4:36 p.m.
Affine Codes / Modulo Arithmetic with N / Extended Euclid	100	Sept. 28, 2015, 4:20 p.m.
Number Sequence — Part 4	100	Sept. 28, 2015, 3:49 p.m.
Letter to the Templars — Part 2	100	Sept. 28, 2015, 3:42 p.m.
Caesar Encryption	100	Sept. 28, 2015, 3:31 p.m.
Number Sequence — Part 2	100	Sept. 28, 2015, 3:12 p.m.
Number Sequence — Part 3	100	Sept. 28, 2015, 3:07 p.m.
Letter to the Templars — Part 1	100	Sept. 28, 2015, 3:03 p.m.
Original Caesar Cipher	100	Sept. 28, 2015, 2:49 p.m.
Number Sequence	100	Sept. 28, 2015, 2:44 p.m.