Account

Name
Dr. Peter Uelkes
Username
RandyWaterhouse
Joined
July 27, 2019, 4:50 a.m.

Rank
18
Points
122,730
Trophies
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Silver0
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Active Challenges (1)

LevelNameAttemptsDate
Lightweight Introduction to Lattices — Part 21 / 15Feb. 11, 2022, 8:12 a.m.

Solved Challenges (179)

LevelNamePointsDate
Weakened ElsieFour — Part 11,105June 24, 2022, 2:45 p.m.
RSA Factoring Challenge: RSA-7040June 22, 2022, 7:55 a.m.
RSA Factoring Challenge: RSA-2300June 22, 2022, 7:53 a.m.
RSA Factoring Challenge: RSA-2200June 22, 2022, 7:51 a.m.
RSA Factoring Challenge: RSA-2100June 22, 2022, 7:48 a.m.
Flawed Usage of a OTP Cipher by the BND1,092June 21, 2022, 1:07 p.m.
Kaskade-S/T — Part 31,080June 15, 2022, 12:52 p.m.
Purple 11,080June 11, 2022, 8:42 a.m.
Pigpen with a twist — Part 31,081June 4, 2022, 7:29 a.m.
Pigpen with a twist — Part 21,081June 4, 2022, 7 a.m.
ASAC — A Strong(er) ADFGVX Cipher — Part 11,096June 2, 2022, 8:38 a.m.
AES key — encoded in the machine readable zone of a European ePassport1,082June 1, 2022, 8:36 a.m.
Wheatstone Cryptograph — Part 21,156May 30, 2022, 2:53 p.m.
Spanish Strip Cipher — Part 21,087May 28, 2022, 11:53 a.m.
Spanish Strip Cipher — Part 11,087May 26, 2022, 5:25 p.m.
Cascading Encryption — Part 2/31,085May 26, 2022, 1 p.m.
M-138 — Part 41,090May 23, 2022, 7:38 a.m.
M-138 — Part 31,090May 21, 2022, 5:09 p.m.
Partial Key Exposure with RSA — Part 11,082May 20, 2022, 11:38 a.m.
Polyphonic Substitution Cipher — Part 21,123May 19, 2022, 12:34 p.m.
Polyphonic Substitution Cipher — Part 11,121May 18, 2022, 5:20 p.m.
Modified Vigenère Cipher1,222May 17, 2022, 1:09 p.m.
AES ECB Wrong Encoding1,104May 15, 2022, 7:18 a.m.
Music Code — Part 1100May 14, 2022, 7:33 a.m.
Music Code — Part 21,081May 13, 2022, 6:51 p.m.
Keyshanc — Part 21,083May 6, 2022, 7:14 a.m.
Keyshanc — Part 11,083May 5, 2022, 1:03 p.m.
Handycipher made in love — Part 21,116May 3, 2022, 2:59 p.m.
An 'unhearable' message100May 3, 2022, 1:58 p.m.
Handycipher made in love — Part 11,113May 2, 2022, 4:37 p.m.
Enigma Combinatorics100May 2, 2022, 1:42 p.m.
Enigma Messages with Repeated Letters — Part 5100May 2, 2022, 7:39 a.m.
Enigma Messages with Repeated Letters — Part 4100May 2, 2022, 7:34 a.m.
Enigma Part 21,080May 2, 2022, 7:24 a.m.
Zodiac Cipher100May 1, 2022, 8:12 a.m.
Enigma Messages with Repeated Letters — Part 2100May 1, 2022, 7:39 a.m.
The Book Code: A Challenge for Bookworms100April 30, 2022, 7:38 a.m.
Brute-Force-Attack on Triple-DES with Reduced Key Space1,080April 29, 2022, 12:48 p.m.
An Invisible Message100April 28, 2022, 1:11 p.m.
Advent Challenge — Part 41,104April 28, 2022, 8:25 a.m.
Smartcard RSA1,080April 27, 2022, 4:01 p.m.
Advent Challenge — Part 31,104April 27, 2022, 1:25 p.m.
A really long number sequence1,081April 27, 2022, 7:50 a.m.
Unconcealed RSA messages1,082April 26, 2022, 12:49 p.m.
Kaskade-S/T — Part 21,080April 25, 2022, 7:18 a.m.
The SZ42 Challenge — Part 121,189April 19, 2022, 2:35 p.m.
The SZ42 Challenge — Part 131,189April 19, 2022, 8:02 a.m.
A Cloaked Substitution Cipher — Part 21,119April 18, 2022, 4:03 p.m.
Monoalphabetic substitution with camouflage — Part 4100April 17, 2022, 3:20 p.m.
Monoalphabetic Substitution with Camouflage — Part 51,083April 17, 2022, 7:49 a.m.
Monoalphabetic substitution with camouflage — Part 31,082April 16, 2022, 12:22 p.m.
Monoalphabetic substitution with camouflage — Part 21,082April 16, 2022, 12:05 p.m.
Monoalphabetic substitution with camouflage — Part 1100April 16, 2022, 12:05 p.m.
Multilingual Monoalphabetic Substitution100April 15, 2022, 6:37 p.m.
Advent-Challenge — Part 21,104April 15, 2022, 4:46 p.m.
A Cloaked Substitution Cipher — Part 11,119April 15, 2022, 4:26 p.m.
A hidden word — Part 2100April 15, 2022, 11:54 a.m.
ECDH-Key Exchange for Beginners100April 14, 2022, 4:48 p.m.
Recycled One-Time Pad100April 14, 2022, 2:55 p.m.
Kaskade-S/T — Part 1100April 13, 2022, 12:02 p.m.
Hybrid Encryption I1,080April 13, 2022, 8:25 a.m.
BCR code (Book-Caesar-RSA)1,084April 12, 2022, 10:18 a.m.
ORYX Stream Cipher Part I1,080April 11, 2022, 2:01 p.m.
News from Castle Mansfeld100April 10, 2022, 12:01 p.m.
A Secret Message from Castle Mansfeld100April 9, 2022, 6:43 p.m.
The SZ42 Challenge — Part 61,140April 9, 2022, 1:41 p.m.
Polyhomophonic Substitution — Part 21,129April 8, 2022, 2:20 p.m.
The SZ42 Challenge — Part 91,146April 8, 2022, 7:04 a.m.
Ku Klux Klan1,000April 8, 2022, 12:21 a.m.
Double Column Transposition — Part 51,089April 4, 2022, 8:25 a.m.
Weakened Granit — Part 1100April 3, 2022, 4:03 p.m.
Double Column Transposition — Part 11,088April 1, 2022, 12:40 p.m.
Double Column Transposition — Part 21,088March 31, 2022, 10:34 a.m.
Double Column Transposition — Part 41,088March 26, 2022, 7:53 a.m.
Double Column Transposition — Part 31,088March 25, 2022, 7:22 p.m.
RSA with Special d13,034March 24, 2022, 9:51 p.m.
CMEA 11,080March 23, 2022, 2:31 p.m.
Factorization Cipher — Part 31,082March 23, 2022, 11:19 a.m.
New Year's Greetings — Part 4100March 22, 2022, 8:35 p.m.
New Year's Greetings — Part 3100March 22, 2022, 8:22 p.m.
New Year's Greetings — Part 2100March 22, 2022, 8:19 p.m.
New Year's Greetings — Part 1100March 22, 2022, 8:16 p.m.
Turing Bombe Enigma I100March 22, 2022, 7:47 a.m.
Find the right route — Part 1100March 21, 2022, 4:03 p.m.
The Einstein Enigma1,106March 17, 2022, 1:38 p.m.
The SZ42 Challenge — Part 71,143March 17, 2022, 8:33 a.m.
The SZ42 Challenge — Part 81,144March 16, 2022, 8:02 a.m.
The SZ42 Challenge — Part 41,139March 16, 2022, 7:08 a.m.
The SZ42 Challenge — Part 51,139March 16, 2022, 7:07 a.m.
The SZ42 Challenge — Part 31,138March 15, 2022, 7:06 a.m.
The SZ42 Challenge — Part 21,137March 14, 2022, 1:37 p.m.
The SZ42 Challenge — Part 11,136March 14, 2022, 8 a.m.
The T52 Sturgeon Challenge — Part 31,119March 11, 2022, 10:09 a.m.
The T52 Sturgeon Challenge — Part 21,119March 10, 2022, 11:18 a.m.
The T52 Sturgeon Challenge — Part 11,119March 9, 2022, 4:07 p.m.
Cipher ID — Part 11,124March 6, 2022, 2:53 p.m.
Lattice Part 11,081Feb. 15, 2022, 7:43 a.m.
Lightweight Introduction to Lattices — Part 31,138Feb. 14, 2022, 7:17 a.m.
Cascading Encryption — Part 1/3100Feb. 13, 2022, 1:49 p.m.
Lightweight Introduction to Lattices — Part 1100Feb. 11, 2022, 8:12 a.m.
Enigma Messages with Repeated Letters — Part 3100Feb. 7, 2022, 8:25 a.m.
Homophonic Encryption — Part 41,118Feb. 5, 2022, 8:08 a.m.
Homophonic Encryption — Part 31,118Feb. 5, 2022, 7:52 a.m.
Homophonic Encryption — Part 21,118Feb. 4, 2022, 8:12 a.m.
Homophonic Encryption — Part 11,118Feb. 4, 2022, 7:43 a.m.
Polyhomophonic Substitution — Part 1100Feb. 3, 2022, 2:14 p.m.
ADFGVX — Part 2100Jan. 31, 2022, 1:20 p.m.
ADFGVX — Part 1100Jan. 31, 2022, 8:25 a.m.
Classical Ciphers^3100Jan. 28, 2022, 5:05 p.m.
Number Sequence — Part 9100Jan. 28, 2022, 2:31 p.m.
Typex — Part 21,086Jan. 27, 2022, 11:04 a.m.
Typex — Part 11,085Jan. 25, 2022, 12:10 p.m.
Trendy Messenger1,109Jan. 19, 2022, 7:18 a.m.
¿No Hablas Español? No problemo!100Jan. 7, 2022, 3:48 p.m.
Pigpen with a twist — Part 1100Jan. 7, 2022, 7:32 a.m.
Double Columnar Transposition100Jan. 6, 2022, 3:23 p.m.
Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1100Jan. 6, 2022, 7:44 a.m.
Molehunt (Part 3/3)1,080Dec. 20, 2021, 8:13 a.m.
Molehunt (Part 2/3)100Dec. 9, 2021, 8:36 a.m.
Molehunt (Part 1/3)100Dec. 9, 2021, 8:08 a.m.
Playfair Encryption100Dec. 3, 2021, 7:50 a.m.
Playfair with hints about the grid100Dec. 2, 2021, 2:41 p.m.
Enigma Messages100Dec. 2, 2021, 2:24 p.m.
Reserve Hand Procedure — Part 1100Dec. 2, 2021, 8:25 a.m.
Hill Cipher with Sudoku Key100Dec. 2, 2021, 7:34 a.m.
Enigma Messages with Repeated Letters — Part 1100Dec. 1, 2021, 10:49 a.m.
Summer Job1,111Nov. 30, 2021, 7:45 a.m.
Unusual encryption using a diophantine equation1,082Nov. 29, 2021, 11:54 a.m.
Lunchtime Attack on the Fully Homomorphic Encryption Scheme1,081Nov. 29, 2021, 8:26 a.m.
Enigma Part 11,080Nov. 26, 2021, 10:50 a.m.
Broadcasting and low exponent — RSA Attack1,082Nov. 26, 2021, 7:59 a.m.
Letter from the Alleged Countess Julie von Ortenburg100Nov. 19, 2021, 8:27 a.m.
Nils away on travel100Nov. 18, 2021, 1:27 p.m.
From Russia with Love100Nov. 18, 2021, 1:20 p.m.
Number Sequence — Part 6100Nov. 18, 2021, 12:59 p.m.
Cryptanalysis Hacking Puzzles — Part 2100Nov. 18, 2021, 12:40 p.m.
Advent-Challenge — Part 1100Nov. 18, 2021, 12:34 p.m.
Autokey Cipher100Nov. 18, 2021, 12:28 p.m.
Wheatstone Cryptograph — Part 1100Nov. 18, 2021, 8:07 a.m.
Cracking SHA1-Hashed Passwords1,081Nov. 17, 2021, 2:34 p.m.
Monoalphabetic Substitution with Nostradamus Flavor1,118Nov. 17, 2021, 8:16 a.m.
The LoRa Cipher: Logic Randomness — Part 11,134Nov. 17, 2021, 7:45 a.m.
Factorization Cipher — Part 21,083Nov. 16, 2021, 7:38 a.m.
The Last Note100Nov. 12, 2021, 12:57 p.m.
How do you become a big cryptographer?100Nov. 11, 2021, 1:01 p.m.
Modular Sequences100Nov. 11, 2021, 12:56 p.m.
A modified homophonic cipher with reduced alphabets — Part 2100Nov. 10, 2021, 12:57 p.m.
A modified homophonic cipher with reduced alphabets — Part 1100Nov. 10, 2021, 12:45 p.m.
One-Time Pad with Flaws100Nov. 10, 2021, 6:09 a.m.
RSA: Two different keys — same ciphertext1,088Aug. 19, 2019, 7:26 a.m.
Fastest in the West1,150Aug. 18, 2019, 12:10 p.m.
Not-so-Secret Message from Malawi — Part I (RSA)1,086Aug. 3, 2019, 7:30 a.m.
Alice's Birthday Party (Part 2)1,086Aug. 3, 2019, 7:02 a.m.
Alice's Birthday Party (Part 1)1,086Aug. 2, 2019, 6:01 p.m.
Trifid Cipher100Aug. 2, 2019, 8:05 a.m.
Monoalphabetic Substitution100July 31, 2019, 5:12 p.m.
Image Noise100July 31, 2019, 7:55 a.m.
M-138 — Part 21,102July 30, 2019, 10:42 a.m.
M-138 — Part 1100July 30, 2019, 7:43 a.m.
Snow White and the seven dwarfs100July 30, 2019, 7:20 a.m.
A hidden word100July 30, 2019, 6:49 a.m.
Letter to the Templars — Part 31,092July 29, 2019, 3:17 p.m.
Letter to the Templars — Part 2100July 29, 2019, 3:09 p.m.
Letter to the Templars — Part 1100July 29, 2019, 2:58 p.m.
Beaver Code100July 29, 2019, 2:04 p.m.
Factorization Cipher — Part 1100July 29, 2019, 7:43 a.m.
Affine Codes / Modulo Arithmetic with N / Extended Euclid100July 29, 2019, 6:56 a.m.
Grille Cipher100July 28, 2019, 4:11 p.m.
Modified Caesar Cipher100July 28, 2019, 11:18 a.m.
Number Sequence — Part 10100July 27, 2019, 6:02 p.m.
Number Sequence — Part 8100July 27, 2019, 5:53 p.m.
Number Sequence — Part 7100July 27, 2019, 5:42 p.m.
Number Sequence — Part 5100July 27, 2019, 5:25 p.m.
Number Sequence — Part 4100July 27, 2019, 5:15 p.m.
Number Sequence — Part 3100July 27, 2019, 5:01 p.m.
Number Sequence — Part 2100July 27, 2019, 4:54 p.m.
Original Caesar Cipher100July 27, 2019, 7:36 a.m.
Number Sequence100July 27, 2019, 7:32 a.m.
Caesar Encryption100July 27, 2019, 7:22 a.m.

Submitted Challenges (2)

LevelNameDate
Alberti Challenge — Part 2May 14, 2022, 12:15 p.m.
Alberti Challenge — Part 1March 26, 2022, 8:40 p.m.

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