Account

Name
Andreas Frerichs
Username
Ossili
Joined
Aug. 18, 2014, 4:39 p.m.

Rank
62
Points
33,266
Trophies
Gold0
Silver0
Bronze0

Active Challenges (2)

LevelNameAttemptsDate
Spirale — Part 11 / 15Oct. 30, 2015, 11:43 a.m.
Handycipher — Part 13 / 15March 5, 2015, 4:21 p.m.

Solved Challenges (99)

LevelNamePointsDate
Advent-Challenge — Part 1133Dec. 11, 2017, 2:07 p.m.
Number Sequence — Part 9107Nov. 30, 2017, 6:57 a.m.
Brute-Force-Attack on Triple-DES with Reduced Key Space1,094Jan. 10, 2017, 4:52 p.m.
Ku Klux Klan1,000Sept. 20, 2016, 8 p.m.
Monoalphabetic substitution with camouflage — Part 31,102Aug. 17, 2016, 8:39 p.m.
Monoalphabetic substitution with camouflage — Part 21,102Aug. 17, 2016, 8:30 p.m.
Not-so-Secret Message from Malawi — Part I (RSA)1,097April 27, 2016, 7:15 p.m.
New Year's Greetings — Part 51,330April 21, 2016, 7:19 p.m.
New Year's Greetings — Part 4104April 13, 2016, 6:32 a.m.
New Year's Greetings — Part 3105April 11, 2016, 10:55 p.m.
New Year's Greetings — Part 2105April 11, 2016, 9:33 p.m.
New Year's Greetings — Part 1105April 11, 2016, 8:50 p.m.
Factorization Cipher — Part 31,105March 7, 2016, 8:37 p.m.
Partial Key Exposure with RSA — Part 11,106Feb. 26, 2016, 8:26 p.m.
RSA: Two different keys — same ciphertext1,103Feb. 22, 2016, 11:31 a.m.
Broadcasting and low exponent — RSA Attack1,102Feb. 19, 2016, 12:06 p.m.
Alice's Birthday Party (Part 2)1,098Feb. 17, 2016, 7:11 p.m.
Enigma Part 21,098Feb. 8, 2016, 11:28 p.m.
Enigma Part 11,098Feb. 8, 2016, 8:31 p.m.
Heartbleed — Part 31,142Feb. 1, 2016, 10:06 p.m.
Molehunt (Part 3/3)1,099Jan. 11, 2016, 5:18 p.m.
Heartbleed — Part 2100Dec. 15, 2015, 9:49 p.m.
Heartbleed — Part 1 100Dec. 15, 2015, 8:22 p.m.
An 'unhearable' message100Dec. 11, 2015, 2:15 p.m.
Image Noise200Nov. 21, 2015, 8:19 p.m.
News from Castle Mansfeld150Nov. 14, 2015, 9:45 p.m.
Weakened Granit — Part 1150Sept. 25, 2015, 4:47 p.m.
Number Sequence — Part 8150Sept. 15, 2015, 1:12 p.m.
Cracking SHA1-Hashed Passwords1,104July 14, 2015, 6:43 p.m.
Monoalphabetic substitution with camouflage — Part 4100July 12, 2015, 8:53 p.m.
Monoalphabetic substitution with camouflage — Part 1100July 9, 2015, 9:48 p.m.
Playfair Encryption100June 26, 2015, 9:47 a.m.
Enigma Messages100May 29, 2015, 4:10 p.m.
Enigma Messages with Repeated Letters — Part 5100May 28, 2015, 7:26 p.m.
Enigma Messages with Repeated Letters — Part 4100May 28, 2015, 7:21 p.m.
Enigma Messages with Repeated Letters — Part 3100May 28, 2015, 7:13 p.m.
Enigma Messages with Repeated Letters — Part 2100May 27, 2015, 11:09 p.m.
Turing Bombe Enigma I100May 16, 2015, 12:34 a.m.
Number Sequence — Part 7102May 9, 2015, 8:31 a.m.
A hidden word — Part 2200April 17, 2015, 1:34 p.m.
Number Sequence — Part 6104April 14, 2015, 6:36 p.m.
An Invisible Message100April 8, 2015, 7:41 p.m.
¿No Hablas Español? No problemo!100April 4, 2015, 7:53 p.m.
Number Sequence — Part 5100April 3, 2015, 5:52 p.m.
The Book Code: A Challenge for Bookworms100April 2, 2015, 6:42 p.m.
Strange Message from Thessaloniki100March 26, 2015, 9:56 p.m.
Recycled One-Time Pad100March 26, 2015, 7:21 p.m.
Hill Cipher with Sudoku Key100March 21, 2015, 8:10 p.m.
Multilingual Monoalphabetic Substitution100March 20, 2015, 5:55 p.m.
Nils away on travel100March 13, 2015, 9:49 p.m.
How do you become a big cryptographer?100March 13, 2015, 6:01 p.m.
Modified Caesar Cipher100March 4, 2015, 4:23 p.m.
Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1100Feb. 27, 2015, 1:05 p.m.
ADFGVX — Part 1100Feb. 25, 2015, 7:06 p.m.
ADFGVX — Part 2100Feb. 25, 2015, 4:50 p.m.
Cascading Encryption — Part 1/3100Feb. 18, 2015, 7:49 p.m.
Reserve Hand Procedure — Part 1100Feb. 3, 2015, 3:23 p.m.
Alice's Birthday Party (Part 1)1,104Jan. 29, 2015, 8:42 p.m.
Factorization Cipher — Part 21,114Jan. 28, 2015, 11:13 p.m.
Music Code — Part 21,109Jan. 22, 2015, 10:49 p.m.
Factorization Cipher — Part 1100Jan. 20, 2015, 1:34 p.m.
Music Code — Part 1100Jan. 13, 2015, 12:03 p.m.
ECDH-Key Exchange for Beginners100Jan. 6, 2015, 3:49 p.m.
M-138 — Part 21,547Dec. 31, 2014, 12:11 a.m.
M-138 — Part 1150Dec. 25, 2014, 4:30 p.m.
Kaskade-S/T — Part 1100Nov. 12, 2014, 11:54 a.m.
Double Columnar Transposition100Nov. 11, 2014, 10:11 a.m.
Letter to the Templars — Part 2100Nov. 10, 2014, 5:19 p.m.
Enigma Messages with Repeated Letters — Part 1100Nov. 7, 2014, 3:35 p.m.
A hidden word100Nov. 6, 2014, 2:06 p.m.
Grille Cipher100Nov. 6, 2014, 11:18 a.m.
Affine Codes / Modulo Arithmetic with N / Extended Euclid100Nov. 4, 2014, 4:31 p.m.
Playfair with hints about the grid100Oct. 31, 2014, 11:12 p.m.
Pigpen with a twist — Part 1100Oct. 30, 2014, 6:36 p.m.
Letter from the Alleged Countess Julie von Ortenburg100Oct. 25, 2014, 12:23 a.m.
Number Sequence — Part 4100Oct. 8, 2014, 11:03 a.m.
Number Sequence — Part 3100Oct. 8, 2014, 10:11 a.m.
Number Sequence — Part 2100Oct. 8, 2014, 8:18 a.m.
Enigma Combinatorics100Oct. 7, 2014, 11:59 a.m.
A Secret Message from Castle Mansfeld100Sept. 28, 2014, 5:24 p.m.
The Last Note200Sept. 23, 2014, 7:32 p.m.
Letter to the Templars — Part 31,130Sept. 20, 2014, 2:50 a.m.
Double Column Transposition — Part 41,217Sept. 18, 2014, 2:59 p.m.
Original Caesar Cipher100Sept. 15, 2014, 4:57 p.m.
Molehunt (Part 2/3)100Sept. 15, 2014, 2:19 p.m.
Molehunt (Part 1/3)100Sept. 15, 2014, 11:01 a.m.
A modified homophonic cipher with reduced alphabets — Part 2100Sept. 12, 2014, 11:06 a.m.
A modified homophonic cipher with reduced alphabets — Part 1100Sept. 12, 2014, 10:09 a.m.
One-Time Pad with Flaws100Sept. 11, 2014, 4:27 p.m.
Zodiac Cipher100Sept. 5, 2014, 1:37 p.m.
Caesar Encryption100Sept. 5, 2014, 9:50 a.m.
From Russia with Love100Sept. 4, 2014, 3:57 p.m.
Letter to the Templars — Part 1100Sept. 4, 2014, 11:25 a.m.
Beaver Code100Sept. 3, 2014, 11:34 a.m.
Trifid Cipher100Sept. 2, 2014, 9:12 p.m.
Snow White and the seven dwarfs100Sept. 1, 2014, 7:42 p.m.
Classical Ciphers^3100Aug. 31, 2014, 2:05 p.m.
Monoalphabetic Substitution100Aug. 22, 2014, 9:22 a.m.
Number Sequence100Aug. 21, 2014, 9:32 a.m.

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