Account

Name
Julia Bernotat
Username
El Greco
Joined
June 27, 2014, 6:54 p.m.

Rank
24
Points
81,129
Trophies
Gold0
Silver2
Bronze2

Active Challenges (1)

LevelNameAttemptsDate
Monoalphabetic substitution with camouflage — Part 48 / 15Feb. 19, 2015, 3:53 p.m.

Solved Challenges (117)

LevelNamePointsDate
ASAC — A Strong(er) ADFGVX Cipher — Part 11,433July 23, 2016, 12:33 a.m.
Enigma Messages with Repeated Letters — Part 4100April 20, 2016, 10:25 p.m.
AES key — encoded in the machine readable zone of a European ePassport1,105March 24, 2016, 7:01 p.m.
M-138 — Part 41,149March 10, 2016, 9:26 p.m.
M-138 — Part 31,150Feb. 27, 2016, 1:33 a.m.
CMEA 213,370Feb. 1, 2016, 4:13 p.m.
CMEA 11,099Jan. 31, 2016, 8:40 p.m.
ORYX Stream Cipher — Part 4a1,134Jan. 15, 2016, 11:31 p.m.
ORYX Stream Cipher Part II1,099Jan. 3, 2016, 3:54 p.m.
ORYX Stream Cipher — Part 3 (revised)1,120Dec. 31, 2015, 1:58 p.m.
ORYX Stream Cipher Part I1,099Dec. 24, 2015, 1:15 p.m.
A hidden word — Part 2100Nov. 18, 2015, 8:14 p.m.
Smartcard RSA1,100Nov. 18, 2015, 5:30 p.m.
Lunchtime Attack on the Fully Homomorphic Encryption Scheme1,101Nov. 15, 2015, 9:22 p.m.
News from Castle Mansfeld133Nov. 15, 2015, 9:20 p.m.
Unknown Author900Nov. 5, 2015, 7:36 p.m.
Weakened Granit — Part 1133Sept. 26, 2015, 1:17 p.m.
Number Sequence — Part 8111Sept. 22, 2015, 4:39 p.m.
Flawed Usage of a OTP Cipher by the BND1,337Sept. 21, 2015, 9:32 p.m.
Snow White and the seven dwarfs100Aug. 3, 2015, 10:48 p.m.
Weakened Handycipher — Part 31,485May 23, 2015, 12:58 a.m.
Weakened Handycipher — Part 21,502May 21, 2015, 6:04 p.m.
Weakened Handycipher — Part 11,613May 17, 2015, 6:02 p.m.
Number Sequence — Part 6117March 28, 2015, 8:39 p.m.
Spanish Strip Cipher — Part 21,160March 3, 2015, 10:44 p.m.
Concealed Messages — Vigenère's Night Sky1,118Feb. 14, 2015, 11:07 a.m.
Ku Klux Klan1,000Feb. 6, 2015, 6:50 p.m.
Unusual encryption using a diophantine equation1,111Feb. 3, 2015, 6:02 p.m.
Pigpen with a twist — Part 31,111Jan. 20, 2015, 3:45 p.m.
Double Column Transposition — Part 21,176Jan. 5, 2015, 2:01 p.m.
Kaskade-S/T — Part 21,108Jan. 1, 2015, midnight
Double Column Transposition — Part 41,181Dec. 30, 2014, 1:44 a.m.
M-138 — Part 21,660Dec. 27, 2014, 6:36 p.m.
M-138 — Part 1125Dec. 27, 2014, 1:40 a.m.
Double Columnar Transposition100Dec. 22, 2014, 6:25 p.m.
Playfair Encryption100Dec. 21, 2014, 9:45 p.m.
Playfair with hints about the grid100Dec. 19, 2014, 11:57 p.m.
Brute-Force-Attack on Triple-DES with Reduced Key Space1,105Dec. 17, 2014, 7:31 p.m.
Monoalphabetic Substitution with Camouflage — Part 51,118Dec. 16, 2014, 11:53 p.m.
Monoalphabetic substitution with camouflage — Part 31,115Dec. 14, 2014, 8:52 p.m.
Monoalphabetic substitution with camouflage — Part 21,115Dec. 13, 2014, 12:56 a.m.
Unconcealed RSA messages1,114Dec. 10, 2014, 3:54 p.m.
BCR code (Book-Caesar-RSA)1,125Dec. 2, 2014, 6:56 p.m.
Not-so-Secret Message from Malawi — Part I (RSA)1,105Nov. 30, 2014, 10:51 p.m.
Partial Key Exposure with RSA — Part 11,117Nov. 29, 2014, 12:38 a.m.
RSA: Two different keys — same ciphertext1,112Nov. 27, 2014, 9:43 p.m.
Hybrid Encryption I1,106Nov. 26, 2014, 10:42 p.m.
Broadcasting and low exponent — RSA Attack1,112Nov. 26, 2014, 6:54 p.m.
Alice's Birthday Party (Part 2)1,106Nov. 26, 2014, 1 a.m.
Alice's Birthday Party (Part 1)1,106Nov. 24, 2014, 10:10 p.m.
Enigma Part 21,106Nov. 21, 2014, 1:07 p.m.
Enigma Part 11,106Nov. 18, 2014, 9:23 p.m.
Enigma Messages100Nov. 17, 2014, 6:33 p.m.
Enigma Messages with Repeated Letters — Part 5100Nov. 13, 2014, 11:32 p.m.
Enigma Messages with Repeated Letters — Part 3100Nov. 12, 2014, 5:57 p.m.
Enigma Messages with Repeated Letters — Part 2100Nov. 12, 2014, 1:23 a.m.
An Invisible Message100Nov. 9, 2014, 10:40 p.m.
Factorization Cipher — Part 31,117Nov. 8, 2014, 12:32 a.m.
Factorization Cipher — Part 21,116Nov. 8, 2014, 12:29 a.m.
Kaskade-S/T — Part 51,111Oct. 23, 2014, 7:33 p.m.
Kaskade-S/T — Part 31,109Oct. 23, 2014, 7:26 p.m.
Kaskade-S/T — Part 1100Oct. 1, 2014, 12:23 a.m.
Music Code — Part 21,112Sept. 30, 2014, 5:02 p.m.
Music Code — Part 1100Sept. 30, 2014, 4:54 p.m.
The Last Note125Sept. 26, 2014, 3:07 p.m.
Spanish Strip Cipher — Part 11,196Sept. 14, 2014, 1:33 p.m.
Keyshanc — Part 21,124Sept. 8, 2014, 1:23 p.m.
Keyshanc — Part 11,124Sept. 5, 2014, 1:05 p.m.
Pigpen with a twist — Part 21,115Sept. 4, 2014, 3:32 p.m.
Strange Message from Thessaloniki100Aug. 30, 2014, 9:41 p.m.
Recycled One-Time Pad100Aug. 29, 2014, 11:33 p.m.
Monoalphabetic substitution with camouflage — Part 1100Aug. 28, 2014, 12:07 a.m.
Multilingual Monoalphabetic Substitution100Aug. 27, 2014, 12:46 a.m.
Cascading Encryption — Part 1/3100Aug. 26, 2014, 4:41 p.m.
Hill Cipher with Sudoku Key100Aug. 23, 2014, 11:09 p.m.
Enigma Messages with Repeated Letters — Part 1100Aug. 9, 2014, 9:31 p.m.
Enigma Combinatorics100Aug. 9, 2014, 8:08 p.m.
Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1100Aug. 6, 2014, 6:02 p.m.
ECDH-Key Exchange for Beginners100Aug. 4, 2014, 5:50 p.m.
¿No Hablas Español? No problemo!100Aug. 3, 2014, 8:28 p.m.
ADFGVX — Part 2100Aug. 3, 2014, 1:26 p.m.
ADFGVX — Part 1100Aug. 3, 2014, 11:55 a.m.
Zodiac Cipher100Aug. 2, 2014, 12:28 p.m.
Trifid Cipher100July 31, 2014, 11:33 p.m.
Nils away on travel100July 30, 2014, 10:30 p.m.
The Book Code: A Challenge for Bookworms100July 30, 2014, 7:37 p.m.
Molehunt (Part 3/3)1,108July 30, 2014, 2:35 p.m.
Molehunt (Part 2/3)100July 25, 2014, 10:46 p.m.
Molehunt (Part 1/3)100July 25, 2014, 12:44 a.m.
Pigpen with a twist — Part 1100July 17, 2014, 6:22 p.m.
Monoalphabetic Substitution100July 16, 2014, 10:08 p.m.
Modified Caesar Cipher100July 16, 2014, 8:33 p.m.
How do you become a big cryptographer?100July 16, 2014, 3:57 p.m.
Number Sequence — Part 3100July 15, 2014, 1:02 p.m.
Classical Ciphers^3100July 14, 2014, 9:54 p.m.
A really long number sequence1,117July 12, 2014, 5:20 p.m.
One-Time Pad with Flaws100July 10, 2014, 9:12 p.m.
A hidden word100July 9, 2014, 9:35 p.m.
Number Sequence100July 8, 2014, 4:12 p.m.
Factorization Cipher — Part 1100July 7, 2014, 7:08 p.m.
A Secret Message from Castle Mansfeld100July 6, 2014, 2:43 p.m.
A modified homophonic cipher with reduced alphabets — Part 2100July 5, 2014, 6:35 p.m.
Number Sequence — Part 4100July 5, 2014, 6:10 p.m.
A modified homophonic cipher with reduced alphabets — Part 1100July 3, 2014, 9:14 p.m.
Cracking SHA1-Hashed Passwords1,113July 3, 2014, 4:04 p.m.
Letter to the Templars — Part 31,134July 2, 2014, 10:38 p.m.
Letter from the Alleged Countess Julie von Ortenburg100July 2, 2014, 7:55 p.m.
From Russia with Love100July 1, 2014, 10:43 p.m.
Reserve Hand Procedure — Part 1100July 1, 2014, 7:17 p.m.
Grille Cipher100July 1, 2014, 1:28 p.m.
Affine Codes / Modulo Arithmetic with N / Extended Euclid100June 30, 2014, 5:15 p.m.
Letter to the Templars — Part 2100June 30, 2014, 2:13 p.m.
Letter to the Templars — Part 1100June 29, 2014, 4:43 p.m.
Number Sequence — Part 2100June 29, 2014, 2:59 p.m.
Beaver Code100June 29, 2014, 2:22 p.m.
Original Caesar Cipher100June 28, 2014, 11:44 p.m.
Caesar Encryption100June 28, 2014, 10:02 p.m.

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