Account

Name
Daniel Fretwell
Username
fretty
Joined
June 18, 2011, 11:43 a.m.

Rank
69
Points
30,107
Trophies
Gold5
Silver1
Bronze2

Solved Challenges (51)

LevelNamePointsDate
¿No Hablas Español? No problemo!100March 14, 2017, 8:20 p.m.
How do you become a big cryptographer?100March 14, 2017, 8:06 p.m.
Partial Key Exposure with RSA — Part 11,140Aug. 8, 2013, 3:49 p.m.
Nils away on travel200Aug. 8, 2013, 3:30 p.m.
A hidden word104Jan. 30, 2013, 11:05 a.m.
Beaver Code111Aug. 22, 2012, 9:14 a.m.
ECDH-Key Exchange for Beginners120Feb. 28, 2012, 11:48 p.m.
Factorization Cipher — Part 1200Oct. 18, 2011, 12:25 a.m.
Grille Cipher200Oct. 14, 2011, 6:18 p.m.
A really long number sequence1,378Sept. 26, 2011, 1:42 p.m.
Affine Codes / Modulo Arithmetic with N / Extended Euclid200Sept. 9, 2011, 12:12 p.m.
Unusual encryption using a diophantine equation2,000Sept. 2, 2011, 5:57 p.m.
Modified Caesar Cipher200Sept. 2, 2011, 4:25 p.m.
Brute-Force-Attack on Triple-DES with Reduced Key Space1,164Aug. 25, 2011, 12:50 a.m.
Cracking SHA1-Hashed Passwords1,208Aug. 23, 2011, 10:14 p.m.
Lunchtime Attack on the Fully Homomorphic Encryption Scheme1,182Aug. 22, 2011, 11:41 p.m.
ORYX Stream Cipher Part I1,165Aug. 22, 2011, 12:54 a.m.
Smartcard RSA1,167Aug. 18, 2011, 9:43 p.m.
ADFGVX — Part 1200Aug. 16, 2011, 12:59 a.m.
ADFGVX — Part 2200Aug. 15, 2011, 11:37 p.m.
RSA: Two different keys — same ciphertext2,000Aug. 15, 2011, 7:34 p.m.
Enigma Part 11,166Aug. 13, 2011, 4:46 p.m.
Not-so-Secret Message from Malawi — Part I (RSA)1,166Aug. 13, 2011, 1:08 p.m.
Lattice Part 11,202Aug. 12, 2011, 10:21 p.m.
Enigma Part 21,167Aug. 9, 2011, 7:18 p.m.
Hybrid Encryption I1,170Aug. 9, 2011, 2:58 p.m.
Zodiac Cipher100Aug. 1, 2011, 10:15 p.m.
A Secret Message from Castle Mansfeld100Aug. 1, 2011, 12:45 p.m.
Letter from the Alleged Countess Julie von Ortenburg100July 31, 2011, 3:36 p.m.
Molehunt (Part 3/3)1,170July 31, 2011, 2:43 p.m.
Molehunt (Part 2/3)100July 31, 2011, 1:44 p.m.
Molehunt (Part 1/3)100July 31, 2011, 12:24 p.m.
Music Code — Part 21,251July 31, 2011, 11:43 a.m.
Playfair Encryption100July 31, 2011, 11:19 a.m.
Not-so-Secret Message from Malawi — Part II (ECC)1,169July 28, 2011, 1 p.m.
Kaskade-S/T — Part 1101July 24, 2011, 1:35 a.m.
Broadcasting and low exponent — RSA Attack2,000July 22, 2011, 8:34 p.m.
Music Code — Part 1102July 17, 2011, 6:27 p.m.
Monoalphabetic Substitution100July 15, 2011, 12:05 p.m.
Number Sequence — Part 2150July 12, 2011, 5:36 p.m.
Enigma Combinatorics100June 29, 2011, 1:59 p.m.
Classical Ciphers^3100June 27, 2011, 11:50 a.m.
Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1101June 23, 2011, 2:34 p.m.
One-Time Pad with Flaws100June 21, 2011, 11:16 a.m.
Alice's Birthday Party (Part 2)1,176June 20, 2011, 3:29 p.m.
Alice's Birthday Party (Part 1)1,176June 20, 2011, 2:53 p.m.
A modified homophonic cipher with reduced alphabets — Part 2100June 20, 2011, 12:51 p.m.
A modified homophonic cipher with reduced alphabets — Part 1100June 20, 2011, 12:38 p.m.
Number Sequence100June 18, 2011, 3:39 p.m.
Caesar Encryption100June 18, 2011, 3:37 p.m.
Original Caesar Cipher101June 18, 2011, 2:15 p.m.

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