Account

Name

Thomas Gonda

Username

TomG

Joined

Oct. 18, 2010, 7:02 a.m.

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Points

37,598

Rank

61

Trophies

Gold1

Silver3

Bronze3

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Progress

46 / 92

27 / 175

0 / 75

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Links

Forum profile

Active Challenges (7)

Level	Name	Attempts	Date
	Hill Cipher with Sudoku Key	1 / 15	Sept. 10, 2013, 2:17 p.m.
	An 'unhearable' message	3 / 15	Oct. 16, 2012, 5:13 p.m.
	ADFGVX — Part 2	4 / 99	March 7, 2012, 9:31 p.m.
	Music Code — Part 1	9 / 20	Oct. 7, 2011, 2:31 p.m.
	Unusual encryption using a diophantine equation	3 / 20	Sept. 16, 2011, 8:14 a.m.
	Pigpen with a twist — Part 2	11 / 15	Sept. 12, 2011, 9:38 p.m.
	Purple 1	2 / 25	March 22, 2011, 7:06 p.m.

Solved Challenges (73)

Level	Name	Points	Date
	Alberti Challenge — Part 1	101	June 22, 2022, 8:25 p.m.
	Summer Job	1,106	June 22, 2022, noon
	Wheatstone Cryptograph — Part 1	100	June 21, 2022, 11:06 p.m.
	M-138 — Part 2	1,113	March 22, 2018, 9:32 p.m.
	Advent-Challenge — Part 2	1,236	March 19, 2018, 2:50 p.m.
	Number Sequence — Part 8	100	March 16, 2018, 8:35 a.m.
	Advent-Challenge — Part 1	101	March 16, 2018, 8:08 a.m.
	¿No Hablas Español? No problemo!	100	April 14, 2015, 10:12 p.m.
	Trifid Cipher	100	April 14, 2015, 9:29 p.m.
	M-138 — Part 1	101	April 9, 2015, 9:09 p.m.
	Number Sequence — Part 5	100	Sept. 3, 2014, 10:15 p.m.
	Nils away on travel	100	Aug. 30, 2014, 9:52 p.m.
	RSA Factoring Challenge: RSA-704	0	Aug. 30, 2014, 8:44 p.m.
	RSA Factoring Challenge: RSA-210	0	Aug. 30, 2014, 8:39 p.m.
	Enigma Messages with Repeated Letters — Part 1	100	Aug. 29, 2014, 10:36 p.m.
	Heartbleed — Part 2	200	Aug. 28, 2014, 11:11 p.m.
	Heartbleed — Part 1	200	Aug. 28, 2014, 10:31 p.m.
	From Russia with Love	100	Aug. 28, 2014, 9:33 p.m.
	Factorization Cipher — Part 2	1,133	Sept. 12, 2013, 2:36 p.m.
	Keyshanc — Part 1	1,146	Sept. 11, 2013, 5:44 p.m.
	Pigpen with a twist — Part 1	100	Sept. 10, 2013, 2:20 p.m.
	How do you become a big cryptographer?	100	Sept. 9, 2013, 5 p.m.
	Reserve Hand Procedure — Part 1	101	Sept. 2, 2013, 4:27 p.m.
	A hidden word	100	Aug. 21, 2013, 10:59 a.m.
	Snow White and the seven dwarfs	105	May 9, 2013, 2:32 p.m.
	Letter to the Templars — Part 3	1,523	Oct. 16, 2012, 5:39 p.m.
	Letter to the Templars — Part 2	101	Oct. 16, 2012, 5:20 p.m.
	Letter to the Templars — Part 1	101	Oct. 16, 2012, 5:14 p.m.
	Beaver Code	102	Oct. 16, 2012, 4:42 p.m.
	Number Sequence — Part 4	113	April 26, 2012, 2:35 p.m.
	Number Sequence — Part 3	108	April 12, 2012, 1:03 p.m.
	The Book Code: A Challenge for Bookworms	133	March 23, 2012, 1:28 p.m.
	RSA: Two different keys — same ciphertext	1,184	March 16, 2012, 8:41 p.m.
	Partial Key Exposure with RSA — Part 1	1,362	March 5, 2012, 3:41 p.m.
	AES key — encoded in the machine readable zone of a European ePassport	1,288	March 4, 2012, 10:18 p.m.
	Factorization Cipher — Part 1	200	Oct. 18, 2011, 11:45 a.m.
	Grille Cipher	133	Oct. 17, 2011, 1:12 p.m.
	Broadcasting and low exponent — RSA Attack	1,251	Oct. 5, 2011, 9:35 p.m.
	Not-so-Secret Message from Malawi — Part I (RSA)	1,158	Oct. 4, 2011, 9:49 p.m.
	A really long number sequence	1,502	Sept. 14, 2011, 10:37 a.m.
	Modified Caesar Cipher	109	Sept. 12, 2011, 9:51 p.m.
	Affine Codes / Modulo Arithmetic with N / Extended Euclid	125	Sept. 12, 2011, 3:24 p.m.
	Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1	101	Aug. 9, 2011, 9:41 a.m.
	Number Sequence — Part 2	103	Aug. 9, 2011, 8:47 a.m.
	Cracking SHA1-Hashed Passwords	1,349	May 1, 2011, 5:51 p.m.
	Enigma Part 2	1,202	March 20, 2011, 10:11 a.m.
	Kaskade-S/T — Part 3	1,444	March 16, 2011, 9:24 p.m.
	Playfair Encryption	101	March 11, 2011, 3:32 p.m.
	Classical Ciphers^3	101	March 10, 2011, 8:46 p.m.
	Kaskade-S/T — Part 2	1,576	March 9, 2011, 6:25 p.m.
	Kaskade-S/T — Part 1	133	March 6, 2011, 2:25 p.m.
	Enigma Combinatorics	101	Feb. 23, 2011, 5:47 p.m.
	Hybrid Encryption I	1,242	Jan. 26, 2011, 1:10 p.m.
	Lunchtime Attack on the Fully Homomorphic Encryption Scheme	1,725	Jan. 16, 2011, 7:26 p.m.
	ORYX Stream Cipher Part II	1,235	Jan. 16, 2011, 11:55 a.m.
	ORYX Stream Cipher Part I	1,236	Jan. 14, 2011, 8:39 p.m.
	Alice's Birthday Party (Part 2)	1,244	Jan. 5, 2011, 6:16 p.m.
	Alice's Birthday Party (Part 1)	1,244	Jan. 5, 2011, 6:14 p.m.
	Molehunt (Part 3/3)	1,279	Dec. 16, 2010, 6:02 p.m.
	Molehunt (Part 2/3)	102	Dec. 15, 2010, 10:22 a.m.
	Original Caesar Cipher	200	Dec. 15, 2010, 9:01 a.m.
	Molehunt (Part 1/3)	102	Dec. 14, 2010, 7:44 p.m.
	Enigma Part 1	1,275	Dec. 10, 2010, 11:44 a.m.
	A Secret Message from Castle Mansfeld	102	Dec. 8, 2010, 5:52 p.m.
	Zodiac Cipher	102	Dec. 8, 2010, 1:49 p.m.
	Caesar Encryption	102	Dec. 7, 2010, 11:05 p.m.
	Brute-Force-Attack on Triple-DES with Reduced Key Space	1,278	Dec. 7, 2010, 10:34 p.m.
	A modified homophonic cipher with reduced alphabets — Part 2	102	Dec. 5, 2010, 9:41 p.m.
	A modified homophonic cipher with reduced alphabets — Part 1	102	Dec. 5, 2010, 9:09 p.m.
	One-Time Pad with Flaws	104	Dec. 5, 2010, 8:23 p.m.
	Letter from the Alleged Countess Julie von Ortenburg	125	Oct. 18, 2010, 1:10 p.m.
	Monoalphabetic Substitution	125	Oct. 18, 2010, 11:05 a.m.
	Number Sequence	125	Oct. 18, 2010, 9:54 a.m.