Account

Name

Dr. Peter Uelkes

Username

RandyWaterhouse

Joined

July 27, 2019, 4:50 a.m.

Points

138,120

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Active Challenges (1)

Level	Name	Attempts	Date
	Lightweight Introduction to Lattices — Part 2	1 / 15	Feb. 11, 2022, 8:12 a.m.

Solved Challenges (190)

Name	Points	Date
The Hutton Cipher – Part 1	2,000	May 3, 2023, 6:41 a.m.
Spirale — Part 1	1,089	March 31, 2023, 7:14 a.m.
Spirale — Part 2	1,089	March 31, 2023, 6:57 a.m.
The Josse Challenge – Part 3	1,824	March 29, 2023, 6:54 a.m.
The Josse Challenge – Part 2	2,000	Feb. 25, 2023, 9:19 a.m.
The Josse Challenge – Part 1	1,824	Feb. 11, 2023, 4:37 p.m.
The Syllabary Cipher – Part 5	1,324	Dec. 1, 2022, 7:56 a.m.
The Syllabary Cipher – Part 4	1,327	Nov. 30, 2022, 8:21 a.m.
The Syllabary Cipher – Part 3	1,327	Nov. 30, 2022, 7:15 a.m.
The Syllabary Cipher – Part 2	1,469	Nov. 7, 2022, 1:22 p.m.
The Syllabary Cipher – Part 1	117	Nov. 3, 2022, 7:30 a.m.
Weakened ElsieFour — Part 1	1,105	June 24, 2022, 2:45 p.m.
RSA Factoring Challenge: RSA-704	0	June 22, 2022, 7:55 a.m.
RSA Factoring Challenge: RSA-230	0	June 22, 2022, 7:53 a.m.
RSA Factoring Challenge: RSA-220	0	June 22, 2022, 7:51 a.m.
RSA Factoring Challenge: RSA-210	0	June 22, 2022, 7:48 a.m.
Flawed Usage of a OTP Cipher by the BND	1,092	June 21, 2022, 1:07 p.m.
Kaskade-S/T — Part 3	1,080	June 15, 2022, 12:52 p.m.
Purple 1	1,080	June 11, 2022, 8:42 a.m.
Pigpen with a twist — Part 3	1,081	June 4, 2022, 7:29 a.m.
Pigpen with a twist — Part 2	1,081	June 4, 2022, 7 a.m.
ASAC — A Strong(er) ADFGVX Cipher — Part 1	1,096	June 2, 2022, 8:38 a.m.
AES key — encoded in the machine readable zone of a European ePassport	1,082	June 1, 2022, 8:36 a.m.
Wheatstone Cryptograph — Part 2	1,156	May 30, 2022, 2:53 p.m.
Spanish Strip Cipher — Part 2	1,087	May 28, 2022, 11:53 a.m.
Spanish Strip Cipher — Part 1	1,087	May 26, 2022, 5:25 p.m.
Cascading Encryption — Part 2/3	1,085	May 26, 2022, 1 p.m.
M-138 — Part 4	1,090	May 23, 2022, 7:38 a.m.
M-138 — Part 3	1,090	May 21, 2022, 5:09 p.m.
Partial Key Exposure with RSA — Part 1	1,082	May 20, 2022, 11:38 a.m.
Polyphonic Substitution Cipher — Part 2	1,123	May 19, 2022, 12:34 p.m.
Polyphonic Substitution Cipher — Part 1	1,121	May 18, 2022, 5:20 p.m.
Modified Vigenère Cipher	1,222	May 17, 2022, 1:09 p.m.
AES ECB Wrong Encoding	1,104	May 15, 2022, 7:18 a.m.
Music Code — Part 1	100	May 14, 2022, 7:33 a.m.
Music Code — Part 2	1,081	May 13, 2022, 6:51 p.m.
Keyshanc — Part 2	1,083	May 6, 2022, 7:14 a.m.
Keyshanc — Part 1	1,083	May 5, 2022, 1:03 p.m.
Handycipher made in love — Part 2	1,116	May 3, 2022, 2:59 p.m.
An 'unhearable' message	100	May 3, 2022, 1:58 p.m.
Handycipher made in love — Part 1	1,113	May 2, 2022, 4:37 p.m.
Enigma Combinatorics	100	May 2, 2022, 1:42 p.m.
Enigma Messages with Repeated Letters — Part 5	100	May 2, 2022, 7:39 a.m.
Enigma Messages with Repeated Letters — Part 4	100	May 2, 2022, 7:34 a.m.
Enigma Part 2	1,080	May 2, 2022, 7:24 a.m.
Zodiac Cipher	100	May 1, 2022, 8:12 a.m.
Enigma Messages with Repeated Letters — Part 2	100	May 1, 2022, 7:39 a.m.
The Book Code: A Challenge for Bookworms	100	April 30, 2022, 7:38 a.m.
Brute-Force-Attack on Triple-DES with Reduced Key Space	1,080	April 29, 2022, 12:48 p.m.
An Invisible Message	100	April 28, 2022, 1:11 p.m.
Advent Challenge — Part 4	1,104	April 28, 2022, 8:25 a.m.
Smartcard RSA	1,080	April 27, 2022, 4:01 p.m.
Advent Challenge — Part 3	1,104	April 27, 2022, 1:25 p.m.
A really long number sequence	1,081	April 27, 2022, 7:50 a.m.
Unconcealed RSA messages	1,082	April 26, 2022, 12:49 p.m.
Kaskade-S/T — Part 2	1,080	April 25, 2022, 7:18 a.m.
The SZ42 Challenge — Part 12	1,189	April 19, 2022, 2:35 p.m.
The SZ42 Challenge — Part 13	1,189	April 19, 2022, 8:02 a.m.
A Cloaked Substitution Cipher — Part 2	1,119	April 18, 2022, 4:03 p.m.
Monoalphabetic substitution with camouflage — Part 4	100	April 17, 2022, 3:20 p.m.
Monoalphabetic Substitution with Camouflage — Part 5	1,083	April 17, 2022, 7:49 a.m.
Monoalphabetic substitution with camouflage — Part 3	1,082	April 16, 2022, 12:22 p.m.
Monoalphabetic substitution with camouflage — Part 2	1,082	April 16, 2022, 12:05 p.m.
Monoalphabetic substitution with camouflage — Part 1	100	April 16, 2022, 12:05 p.m.
Multilingual Monoalphabetic Substitution	100	April 15, 2022, 6:37 p.m.
Advent-Challenge — Part 2	1,104	April 15, 2022, 4:46 p.m.
A Cloaked Substitution Cipher — Part 1	1,119	April 15, 2022, 4:26 p.m.
A hidden word — Part 2	100	April 15, 2022, 11:54 a.m.
ECDH-Key Exchange for Beginners	100	April 14, 2022, 4:48 p.m.
Recycled One-Time Pad	100	April 14, 2022, 2:55 p.m.
Kaskade-S/T — Part 1	100	April 13, 2022, 12:02 p.m.
Hybrid Encryption I	1,080	April 13, 2022, 8:25 a.m.
BCR code (Book-Caesar-RSA)	1,084	April 12, 2022, 10:18 a.m.
ORYX Stream Cipher Part I	1,080	April 11, 2022, 2:01 p.m.
News from Castle Mansfeld	100	April 10, 2022, 12:01 p.m.
A Secret Message from Castle Mansfeld	100	April 9, 2022, 6:43 p.m.
The SZ42 Challenge — Part 6	1,140	April 9, 2022, 1:41 p.m.
Polyhomophonic Substitution — Part 2	1,129	April 8, 2022, 2:20 p.m.
The SZ42 Challenge — Part 9	1,146	April 8, 2022, 7:04 a.m.
Ku Klux Klan	1,000	April 8, 2022, 12:21 a.m.
Double Column Transposition — Part 5	1,089	April 4, 2022, 8:25 a.m.
Weakened Granit — Part 1	100	April 3, 2022, 4:03 p.m.
Double Column Transposition — Part 1	1,088	April 1, 2022, 12:40 p.m.
Double Column Transposition — Part 2	1,088	March 31, 2022, 10:34 a.m.
Double Column Transposition — Part 4	1,088	March 26, 2022, 7:53 a.m.
Double Column Transposition — Part 3	1,088	March 25, 2022, 7:22 p.m.
RSA with Special d	13,034	March 24, 2022, 9:51 p.m.
CMEA 1	1,080	March 23, 2022, 2:31 p.m.
Factorization Cipher — Part 3	1,082	March 23, 2022, 11:19 a.m.
New Year's Greetings — Part 4	100	March 22, 2022, 8:35 p.m.
New Year's Greetings — Part 3	100	March 22, 2022, 8:22 p.m.
New Year's Greetings — Part 2	100	March 22, 2022, 8:19 p.m.
New Year's Greetings — Part 1	100	March 22, 2022, 8:16 p.m.
Turing Bombe Enigma I	100	March 22, 2022, 7:47 a.m.
Find the right route — Part 1	100	March 21, 2022, 4:03 p.m.
The Einstein Enigma	1,106	March 17, 2022, 1:38 p.m.
The SZ42 Challenge — Part 7	1,143	March 17, 2022, 8:33 a.m.
The SZ42 Challenge — Part 8	1,144	March 16, 2022, 8:02 a.m.
The SZ42 Challenge — Part 4	1,139	March 16, 2022, 7:08 a.m.
The SZ42 Challenge — Part 5	1,139	March 16, 2022, 7:07 a.m.
The SZ42 Challenge — Part 3	1,138	March 15, 2022, 7:06 a.m.
The SZ42 Challenge — Part 2	1,137	March 14, 2022, 1:37 p.m.
The SZ42 Challenge — Part 1	1,136	March 14, 2022, 8 a.m.
The T52 Sturgeon Challenge — Part 3	1,119	March 11, 2022, 10:09 a.m.
The T52 Sturgeon Challenge — Part 2	1,119	March 10, 2022, 11:18 a.m.
The T52 Sturgeon Challenge — Part 1	1,119	March 9, 2022, 4:07 p.m.
Cipher ID — Part 1	1,124	March 6, 2022, 2:53 p.m.
Lattice Part 1	1,081	Feb. 15, 2022, 7:43 a.m.
Lightweight Introduction to Lattices — Part 3	1,138	Feb. 14, 2022, 7:17 a.m.
Cascading Encryption — Part 1/3	100	Feb. 13, 2022, 1:49 p.m.
Lightweight Introduction to Lattices — Part 1	100	Feb. 11, 2022, 8:12 a.m.
Enigma Messages with Repeated Letters — Part 3	100	Feb. 7, 2022, 8:25 a.m.
Homophonic Encryption — Part 4	1,118	Feb. 5, 2022, 8:08 a.m.
Homophonic Encryption — Part 3	1,118	Feb. 5, 2022, 7:52 a.m.
Homophonic Encryption — Part 2	1,118	Feb. 4, 2022, 8:12 a.m.
Homophonic Encryption — Part 1	1,118	Feb. 4, 2022, 7:43 a.m.
Polyhomophonic Substitution — Part 1	100	Feb. 3, 2022, 2:14 p.m.
ADFGVX — Part 2	100	Jan. 31, 2022, 1:20 p.m.
ADFGVX — Part 1	100	Jan. 31, 2022, 8:25 a.m.
Classical Ciphers^3	100	Jan. 28, 2022, 5:05 p.m.
Number Sequence — Part 9	100	Jan. 28, 2022, 2:31 p.m.
Typex — Part 2	1,086	Jan. 27, 2022, 11:04 a.m.
Typex — Part 1	1,085	Jan. 25, 2022, 12:10 p.m.
Trendy Messenger	1,109	Jan. 19, 2022, 7:18 a.m.
¿No Hablas Español? No problemo!	100	Jan. 7, 2022, 3:48 p.m.
Pigpen with a twist — Part 1	100	Jan. 7, 2022, 7:32 a.m.
Double Columnar Transposition	100	Jan. 6, 2022, 3:23 p.m.
Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1	100	Jan. 6, 2022, 7:44 a.m.
Molehunt (Part 3/3)	1,080	Dec. 20, 2021, 8:13 a.m.
Molehunt (Part 2/3)	100	Dec. 9, 2021, 8:36 a.m.
Molehunt (Part 1/3)	100	Dec. 9, 2021, 8:08 a.m.
Playfair Encryption	100	Dec. 3, 2021, 7:50 a.m.
Playfair with hints about the grid	100	Dec. 2, 2021, 2:41 p.m.
Enigma Messages	100	Dec. 2, 2021, 2:24 p.m.
Reserve Hand Procedure — Part 1	100	Dec. 2, 2021, 8:25 a.m.
Hill Cipher with Sudoku Key	100	Dec. 2, 2021, 7:34 a.m.
Enigma Messages with Repeated Letters — Part 1	100	Dec. 1, 2021, 10:49 a.m.
Summer Job	1,111	Nov. 30, 2021, 7:45 a.m.
Unusual encryption using a diophantine equation	1,082	Nov. 29, 2021, 11:54 a.m.
Lunchtime Attack on the Fully Homomorphic Encryption Scheme	1,081	Nov. 29, 2021, 8:26 a.m.
Enigma Part 1	1,080	Nov. 26, 2021, 10:50 a.m.
Broadcasting and low exponent — RSA Attack	1,082	Nov. 26, 2021, 7:59 a.m.
Letter from the Alleged Countess Julie von Ortenburg	100	Nov. 19, 2021, 8:27 a.m.
Nils away on travel	100	Nov. 18, 2021, 1:27 p.m.
From Russia with Love	100	Nov. 18, 2021, 1:20 p.m.
Number Sequence — Part 6	100	Nov. 18, 2021, 12:59 p.m.
Cryptanalysis Hacking Puzzles — Part 2	100	Nov. 18, 2021, 12:40 p.m.
Advent-Challenge — Part 1	100	Nov. 18, 2021, 12:34 p.m.
Autokey Cipher	100	Nov. 18, 2021, 12:28 p.m.
Wheatstone Cryptograph — Part 1	100	Nov. 18, 2021, 8:07 a.m.
Cracking SHA1-Hashed Passwords	1,081	Nov. 17, 2021, 2:34 p.m.
Monoalphabetic Substitution with Nostradamus Flavor	1,118	Nov. 17, 2021, 8:16 a.m.
The LoRa Cipher: Logic Randomness — Part 1	1,134	Nov. 17, 2021, 7:45 a.m.
Factorization Cipher — Part 2	1,083	Nov. 16, 2021, 7:38 a.m.
The Last Note	100	Nov. 12, 2021, 12:57 p.m.
How do you become a big cryptographer?	100	Nov. 11, 2021, 1:01 p.m.
Modular Sequences	100	Nov. 11, 2021, 12:56 p.m.
A modified homophonic cipher with reduced alphabets — Part 2	100	Nov. 10, 2021, 12:57 p.m.
A modified homophonic cipher with reduced alphabets — Part 1	100	Nov. 10, 2021, 12:45 p.m.
One-Time Pad with Flaws	100	Nov. 10, 2021, 6:09 a.m.
RSA: Two different keys — same ciphertext	1,088	Aug. 19, 2019, 7:26 a.m.
Fastest in the West	1,150	Aug. 18, 2019, 12:10 p.m.
Not-so-Secret Message from Malawi — Part I (RSA)	1,086	Aug. 3, 2019, 7:30 a.m.
Alice's Birthday Party (Part 2)	1,086	Aug. 3, 2019, 7:02 a.m.
Alice's Birthday Party (Part 1)	1,086	Aug. 2, 2019, 6:01 p.m.
Trifid Cipher	100	Aug. 2, 2019, 8:05 a.m.
Monoalphabetic Substitution	100	July 31, 2019, 5:12 p.m.
Image Noise	100	July 31, 2019, 7:55 a.m.
M-138 — Part 2	1,102	July 30, 2019, 10:42 a.m.
M-138 — Part 1	100	July 30, 2019, 7:43 a.m.
Snow White and the seven dwarfs	100	July 30, 2019, 7:20 a.m.
A hidden word	100	July 30, 2019, 6:49 a.m.
Letter to the Templars — Part 3	1,092	July 29, 2019, 3:17 p.m.
Letter to the Templars — Part 2	100	July 29, 2019, 3:09 p.m.
Letter to the Templars — Part 1	100	July 29, 2019, 2:58 p.m.
Beaver Code	100	July 29, 2019, 2:04 p.m.
Factorization Cipher — Part 1	100	July 29, 2019, 7:43 a.m.
Affine Codes / Modulo Arithmetic with N / Extended Euclid	100	July 29, 2019, 6:56 a.m.
Grille Cipher	100	July 28, 2019, 4:11 p.m.
Modified Caesar Cipher	100	July 28, 2019, 11:18 a.m.
Number Sequence — Part 10	100	July 27, 2019, 6:02 p.m.
Number Sequence — Part 8	100	July 27, 2019, 5:53 p.m.
Number Sequence — Part 7	100	July 27, 2019, 5:42 p.m.
Number Sequence — Part 5	100	July 27, 2019, 5:25 p.m.
Number Sequence — Part 4	100	July 27, 2019, 5:15 p.m.
Number Sequence — Part 3	100	July 27, 2019, 5:01 p.m.
Number Sequence — Part 2	100	July 27, 2019, 4:54 p.m.
Original Caesar Cipher	100	July 27, 2019, 7:36 a.m.
Number Sequence	100	July 27, 2019, 7:32 a.m.
Caesar Encryption	100	July 27, 2019, 7:22 a.m.

Submitted Challenges (5)

Level	Name	Date
	Merkle-Hellman Knapsack Challenge — Part 2	Oct. 14, 2022, 5:28 p.m.
	Merkle-Hellman Knapsack Challenge - Part 1	Oct. 14, 2022, 5:22 p.m.
	Hill Cipher	Sept. 4, 2022, 10:05 a.m.
	Alberti Challenge — Part 2	May 14, 2022, 12:15 p.m.
	Alberti Challenge — Part 1	March 26, 2022, 8:40 p.m.