All Challenges (Compact)

366 published challenges (in level I, II, III and X), sorted by:
Show challenges:
LevelNameNumber of
Solvers
Available
Points
Published on
Number Sequence4380100Oct. 14, 2010
Original Caesar Cipher3090100Dec. 15, 2010
Number Sequence — Part 22161100July 11, 2011
Caesar Encryption1475100Oct. 21, 2010
Beaver Code1226100Aug. 13, 2012
Letter to the Templars — Part 11052100July 16, 2012
Number Sequence — Part 31046100March 30, 2012
A hidden word864100Jan. 6, 2013
Number Sequence — Part 4860100April 18, 2012
Letter to the Templars — Part 2845100July 30, 2012
Letter to the Templars — Part 37211080Oct. 9, 2012
Affine Codes / Modulo Arithmetic with N / Extended Euclid608100Sept. 9, 2011
Cracking SHA1-Hashed Passwords5831077April 4, 2011
Monoalphabetic Substitution561100Oct. 14, 2010
Factorization Cipher — Part 1518100Oct. 17, 2011
Advent-Challenge — Part 1508100Dec. 8, 2017
Grille Cipher505100Oct. 14, 2011
Number Sequence — Part 8415100Sept. 14, 2015
A modified homophonic cipher with reduced alphabets — Part 1402100Oct. 21, 2010
A modified homophonic cipher with reduced alphabets — Part 2348100Oct. 21, 2010
One-Time Pad with Flaws320100Nov. 12, 2010
Alice's Birthday Party (Part 1)3111077Oct. 14, 2010
Snow White and the seven dwarfs302100April 20, 2013
From Russia with Love299100Sept. 4, 2013
Alice's Birthday Party (Part 2)2971077Oct. 14, 2010
Broadcasting and low exponent — RSA Attack2431078July 22, 2011
Modified Caesar Cipher235100Sept. 2, 2011
How do you become a big cryptographer?234100May 28, 2012
M-138 — Part 1229100Dec. 24, 2014
The Syllabary Cipher – Part 1219100Oct. 28, 2022
Cryptanalysis Hacking Puzzles — Part 2211100Jan. 9, 2019
Brute-Force-Attack on Triple-DES with Reduced Key Space2081077Oct. 14, 2010
Not-so-Secret Message from Malawi — Part I (RSA)2071077Oct. 14, 2010
Reserve Hand Procedure — Part 1198100March 6, 2013
Autokey Cipher191100Sept. 25, 2018
Classical Ciphers^3190100Oct. 14, 2010
Enigma Messages with Repeated Letters — Part 1182100Sept. 26, 2013
Letter from the Alleged Countess Julie von Ortenburg181100Oct. 14, 2010
Nils away on travel181100Aug. 8, 2013
Hybrid Encryption I1801077Nov. 2, 2010
¿No Hablas Español? No problemo!173100April 18, 2012
Number Sequence — Part 6168100March 23, 2015
Image Noise166100Nov. 20, 2015
Molehunt (Part 1/3)161100Oct. 23, 2010
RSA: Two different keys — same ciphertext1581078Aug. 15, 2011
Pigpen with a twist — Part 1158100Sept. 5, 2011
The Book Code: A Challenge for Bookworms156100March 21, 2012
Molehunt (Part 2/3)152100Oct. 23, 2010
Factorization Cipher — Part 21501078Dec. 1, 2011
M-138 — Part 21401085Dec. 24, 2014
Alberti Challenge — Part 1136100March 26, 2022
A Secret Message from Castle Mansfeld132100Oct. 14, 2010
Enigma Part 11321077Oct. 14, 2010
Trifid Cipher131100Oct. 28, 2013
Playfair Encryption129100Dec. 22, 2010
ADFGVX — Part 2127100Aug. 15, 2011
ADFGVX — Part 1124100Aug. 15, 2011
Number Sequence — Part 9124100Nov. 16, 2017
Number Sequence — Part 10124100April 18, 2018
A really long number sequence1231078Sept. 5, 2011
Playfair with hints about the grid122100Jan. 16, 2013
Double Columnar Transposition119100Oct. 12, 2011
A hidden word — Part 2117100April 16, 2015
Kaskade-S/T — Part 1108100March 4, 2011
Number Sequence — Part 5108100April 18, 2012
Hill Cipher with Sudoku Key108100Sept. 4, 2013
Enigma Combinatorics107100Nov. 12, 2010
Wheatstone Cryptograph — Part 1104100April 21, 2021
The Last Note103100Sept. 22, 2014
Zodiac Cipher101100Oct. 14, 2010
Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1101100April 7, 2011
ECDH-Key Exchange for Beginners101100Feb. 24, 2012
Number Sequence — Part 7100100March 23, 2015
Factorization Cipher — Part 3971079Jan. 6, 2012
Find the right route — Part 193100Oct. 27, 2020
Enigma Part 2921077Oct. 14, 2010
Heartbleed — Part 1900Aug. 28, 2014
Partial Key Exposure with RSA — Part 1881079Feb. 11, 2012
Enigma Messages with Repeated Letters — Part 288100Oct. 28, 2013
Enigma Messages with Repeated Letters — Part 388100March 5, 2014
AES key — encoded in the machine readable zone of a European ePassport841079Jan. 16, 2012
Molehunt (Part 3/3)831077Oct. 23, 2010
Enigma Messages83100Jan. 23, 2013
Enigma Messages with Repeated Letters — Part 583100March 5, 2014
Multilingual Monoalphabetic Substitution82100Jan. 30, 2013
ORYX Stream Cipher Part I801077Oct. 14, 2010
Enigma Messages with Repeated Letters — Part 480100March 5, 2014
Modular Sequences80100Sept. 25, 2018
Smartcard RSA771077Oct. 25, 2010
Turing Bombe Enigma I75100Oct. 17, 2011
BCR code (Book-Caesar-RSA)751080Sept. 12, 2012
Cascading Encryption — Part 1/375100Jan. 25, 2013
Recycled One-Time Pad71100Nov. 20, 2012
Unusual encryption using a diophantine equation691078Sept. 2, 2011
RSA Factoring Challenge: RSA-704690July 31, 2013
Merkle-Hellman Knapsack Challenge - Part 167100Oct. 14, 2022
Monoalphabetic substitution with camouflage — Part 166100Oct. 27, 2011
M-138 — Part 3651085Dec. 24, 2014
RSA Factoring Challenge: RSA-210640Feb. 7, 2012
An Invisible Message63100Oct. 17, 2011
The Einstein Enigma621095Feb. 7, 2018
Heartbleed — Part 2600Aug. 28, 2014
News from Castle Mansfeld60100Nov. 13, 2015
Summer Job591096June 12, 2018
Lightweight Introduction to Lattices — Part 159100May 16, 2020
Advent-Challenge — Part 2571094Dec. 16, 2017
Monoalphabetic substitution with camouflage — Part 2541078Dec. 7, 2011
New Year's Greetings — Part 154100March 21, 2016
Polyhomophonic Substitution — Part 154100March 22, 2020
Kaskade-S/T — Part 2531077March 4, 2011
Unconcealed RSA messages521078Nov. 2, 2011
Double Column Transposition — Part 4521083May 19, 2014
Weakened Granit — Part 152100Sept. 24, 2015
Monoalphabetic substitution with camouflage — Part 451100Dec. 21, 2011
Strange Message from Thessaloniki51100Dec. 10, 2012
Monoalphabetic substitution with camouflage — Part 3501078Dec. 7, 2011
Keyshanc — Part 1501079May 21, 2012
Lunchtime Attack on the Fully Homomorphic Encryption Scheme491077Jan. 14, 2011
New Year's Greetings — Part 249100March 21, 2016
ORYX Stream Cipher Part II481077Oct. 14, 2010
Advent Challenge — Part 3481094Dec. 22, 2017
RSA Factoring Challenge: RSA-220470Feb. 7, 2012
Double Column Transposition — Part 2471083May 2, 2014
New Year's Greetings — Part 347100March 21, 2016
CMEA 1451077Dec. 6, 2010
Advent Challenge — Part 4451094Dec. 21, 2017
Not-so-Secret Message from Malawi — Part II (ECC)441077Oct. 14, 2010
An 'unhearable' message44100June 5, 2012
New Year's Greetings — Part 444100March 21, 2016
Homophonic Encryption — Part 1441101May 4, 2019
Music Code — Part 143100May 17, 2011
Pigpen with a twist — Part 2431078Sept. 2, 2011
Ku Klux Klan42VariableOct. 14, 2010
Music Code — Part 2421078May 17, 2011
Lightweight Introduction to Lattices — Part 242100June 23, 2020
Pigpen with a twist — Part 3411078Sept. 2, 2011
Keyshanc — Part 2411079May 21, 2012
Double Column Transposition — Part 3411083May 2, 2014
RSA Factoring Challenge: RSA-230400Feb. 7, 2012
Homophonic Encryption — Part 2391101May 8, 2019
Fastest in the West381096June 12, 2018
Monoalphabetic Substitution with Nostradamus Flavor381100Feb. 16, 2019
Homophonic Encryption — Part 3371101May 8, 2019
Homophonic Encryption — Part 4371101May 8, 2019
Kaskade-S/T — Part 3361077March 4, 2011
Trendy Messenger361096June 12, 2018
Lightweight Introduction to Lattices — Part 3361109July 16, 2020
Find the right route — Part 235100Dec. 19, 2020
Lattice Part 1341077March 11, 2011
Monoalphabetic Substitution with Camouflage — Part 5341079March 9, 2012
Spanish Strip Cipher — Part 1341083March 27, 2014
Double Column Transposition — Part 1341083April 4, 2014
Spanish Strip Cipher — Part 2331083March 27, 2014
Heartbleed — Part 3330Aug. 28, 2014
Cryptanalysis Hacking Puzzles — Part 133100Oct. 26, 2018
Find the right route — Part 333100Dec. 26, 2020
Typex — Part 1311081Feb. 28, 2013
ORYX Stream Cipher — Part 3 (revised)311081June 6, 2013
M-138 — Part 4311085Dec. 24, 2014
CMEA 22912978Dec. 6, 2010
AES ECB Wrong Encoding291094Dec. 16, 2017
Polyhomophonic Substitution — Part 2291107March 28, 2020
RSA Factoring Challenge: RSA-232280Feb. 7, 2012
RSA Factoring Challenge: RSA-240280Feb. 7, 2012
Handycipher made in love — Part 1281100Feb. 16, 2019
The LoRa Cipher: Logic Randomness — Part 1281106Feb. 19, 2020
RSA Factoring Challenge: RSA-250270Feb. 7, 2012
Typex — Part 2251081April 3, 2013
Polyphonic Substitution Cipher — Part 1251105Nov. 21, 2019
The Syllabary Cipher – Part 2251145Oct. 28, 2022
RSA with Special d2412974Oct. 14, 2010
Polyphonic Substitution Cipher — Part 2231106Jan. 14, 2020
Handycipher made in love — Part 2221101May 21, 2019
A Cloaked Substitution Cipher — Part 1221103Aug. 21, 2019
Purple 1211077Oct. 27, 2010
Cascading Encryption — Part 2/3211081March 25, 2013
A Cloaked Substitution Cipher — Part 2211103Aug. 25, 2019
Flawed Usage of a OTP Cipher by the BND201087Aug. 23, 2015
Breaking a Filter Generator201098Sept. 25, 2018
The T52 Sturgeon Challenge — Part 1201102July 13, 2019
ASAC — A Strong(er) ADFGVX Cipher — Part 1191089July 9, 2016
The T52 Sturgeon Challenge — Part 2191102July 22, 2019
The SZ42 Challenge — Part 1191110July 22, 2020
The Syllabary Cipher – Part 3191145Oct. 28, 2022
A disguised code19101Oct. 31, 2023
Sigaba Part 1181077Oct. 14, 2010
Cipher ID — Part 1181105Nov. 19, 2019
Polyhomophonic Substitution — Part 3181107April 6, 2020
The SZ42 Challenge — Part 2181110Aug. 5, 2020
The Hutton Cipher – Part 1181167May 2, 2023
The Hutton Cipher – Part 2181173June 5, 2023
Weakened Handycipher — Part 1171086May 13, 2015
Concealed Messages — Vigenère's Night Sky160May 1, 2012
New Year's Greetings — Part 5161088March 21, 2016
The SZ42 Challenge — Part 3161110Aug. 15, 2020
The SZ42 Challenge — Part 4161111Aug. 29, 2020
The SZ42 Challenge — Part 5161111Sept. 3, 2020
Merkle-Hellman Knapsack Challenge — Part 2161144Oct. 14, 2022
Weakened Handycipher — Part 2151086May 13, 2015
Weakened Handycipher — Part 3151086May 13, 2015
The T52 Sturgeon Challenge — Part 3151102July 22, 2019
Wheatstone Cryptograph — Part 2151118May 21, 2021
Cascading Encryption — Part 3/3141081March 29, 2013
The SZ42 Challenge — Part 6141111Oct. 2, 2020
The SZ42 Challenge — Part 8141112Oct. 31, 2020
The Josse Challenge – Part 1141156Feb. 10, 2023
The Josse Challenge – Part 2141157Feb. 25, 2023
The T52 Sturgeon Challenge — Part 4131102July 22, 2019
The SZ42 Challenge — Part 7131112Oct. 27, 2020
The SZ42 Challenge — Part 9131113Dec. 19, 2020
The Syllabary Cipher – Part 4131145Oct. 28, 2022
The Syllabary Cipher – Part 5131145Oct. 28, 2022
The Josse Challenge – Part 3131161March 27, 2023
Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 2121077April 13, 2011
ORYX Stream Cipher — Part 4a121083April 14, 2014
Hill Cipher121141Sept. 4, 2022
Modified Vigenère Cipher111128Jan. 24, 2022
Akelarre Part 1101077Nov. 24, 2010
Kaskade-S/T — Part 5101077May 5, 2011
The T52 Sturgeon Challenge — Part 8101103Aug. 10, 2019
The SIGABA Challenge — Part 1101106Feb. 29, 2020
Alberti Challenge — Part 2101133May 14, 2022
Double Column Transposition — Part 591084June 23, 2014
Hilly — Part 191091Jan. 25, 2017
"The Road" — Part 191099Dec. 8, 2018
The T52 Sturgeon Challenge — Part 1191103Aug. 10, 2019
The T52 Sturgeon Challenge — Part 1291103Aug. 10, 2019
The SIGABA Challenge — Part 291107March 5, 2020
The SZ42 Challenge — Part 1291123Oct. 6, 2021
Handycipher — Part 281085March 3, 2015
The T52 Sturgeon Challenge — Part 981103Aug. 10, 2019
The T52 Sturgeon Challenge — Part 1081103Aug. 10, 2019
The SZ42 Challenge — Part 1381123Oct. 6, 2021
Handycipher — Part 3713132March 3, 2015
Spirale — Part 171087Aug. 23, 2015
Spirale — Part 271087Aug. 23, 2015
Holographic Encryption — Part 171092April 7, 2017
The T52 Sturgeon Challenge — Part 571103Aug. 10, 2019
The T52 Sturgeon Challenge — Part 671103Aug. 10, 2019
The T52 Sturgeon Challenge — Part 771103Aug. 10, 2019
The Heavy T52 Sturgeon Challenge — Part 7713507April 23, 2020
Handycipher — Part 161085March 3, 2015
Weakened Handycipher — Part 461089June 28, 2016
Weakened Handycipher — Part 561089June 28, 2016
Weakened Handycipher — Part 661089June 28, 2016
Kaskade-S/T — Part 6 (RansomKaskade Part 1)61093July 2, 2017
Weakened ElsieFour — Part 161096April 28, 2018
The SIGABA Challenge — Part 3613493March 11, 2020
The Heavy T52 Sturgeon Challenge — Part 4613504April 15, 2020
The Heavy T52 Sturgeon Challenge — Part 5613506April 21, 2020
Sigaba Part 2512974Oct. 14, 2010
Spirale — Part 351087Aug. 23, 2015
Handycipher — Part 5513198June 28, 2016
Handycipher — Part 6513198June 28, 2016
Christmas Challenge 2019: Differential Cryptanalysis — Part 151105Dec. 22, 2019
Differential Cryptanalysis — Part 251106Jan. 28, 2020
The SIGABA Challenge — Part 4513495March 17, 2020
The Heavy T52 Sturgeon Challenge — Part 6513507April 22, 2020
The SZ42 Challenge — Part 1051115Jan. 30, 2021
Notes of an Italian Soldier40Oct. 14, 2010
Handycipher — Part 4413198June 28, 2016
ElsieFour — Part 1413275Oct. 3, 2017
Weakened ElsieFour — Part 341094Oct. 3, 2017
The SZ42 Challenge — Part 1141115Jan. 30, 2021
The Hutton Cipher – Part 341183July 21, 2023
The Hutton Cipher – Part 441196Sept. 6, 2023
Extended Handycipher — Part 131085March 27, 2015
Extended Handycipher — Part 231085March 27, 2015
Extended Handycipher — Part 331085March 27, 2015
Extended Handycipher — Part 4313198June 28, 2016
Extended Handycipher — Part 5313198June 28, 2016
Handycipher — Part 8313231Jan. 21, 2017
Handycipher — Part 9313231Jan. 21, 2017
Holographic Encryption — Part 231092April 7, 2017
The Vatican Challenge — Part 130Feb. 14, 2018
The Vatican Challenge — Part 230Feb. 14, 2018
The Heavy T52 Sturgeon Challenge — Part 2313445Oct. 9, 2019
The Heavy T52 Sturgeon Challenge — Part 3313450Oct. 26, 2019
The Heavy T52 Sturgeon Challenge — Part 9313509April 30, 2020
Double Column Transposition20Oct. 14, 2010
Unknown Author2VariableOct. 14, 2010
Monoalphabetic Substitution with Camouflage — Part 621079June 30, 2012
ORYX Stream Cipher — Part 4b213094April 14, 2014
Extended Handycipher — Part 6213198June 28, 2016
Handycipher — Part 7213231Jan. 21, 2017
Catherine of Aragon's Letter to King Ferdinand, her Father (1509)2VariableNov. 28, 2018
"The Road" — Part 221099Dec. 8, 2018
The Heavy T52 Sturgeon Challenge — Part 1213443Sept. 30, 2019
The SIGABA Challenge — Part 5213498March 26, 2020
SIGABA CSP-889 — Part 121118June 1, 2021
SIGABA CSP-889 — Part 221118June 1, 2021
SIGABA CSP-889 — Part 3213673June 1, 2021
SIGABA CSP-2900 — Part 121120July 31, 2021
SIGABA CSP-2900 — Part 221120July 31, 2021
SIGABA CSP-2900 — Part 3213704July 31, 2021
Elliptic Boogaloo – Part 121239Nov. 27, 2023
Elliptic Boogaloo – Part 2215864Jan. 15, 2024
Beale Ciphers1VariableOct. 14, 2010
Substitution Cipher with Non-Prefix Codes112993June 15, 2011
ASAC — A Strong(er) ADFGVX Cipher — Part 211089July 9, 2016
Hilly — Part 211094Oct. 17, 2017
Weakened ElsieFour — Part 211096April 28, 2018
Handycipher — Part 1011102June 25, 2019
The Vatican Challenge — Part 41VariableJuly 7, 2019
The SIGABA Challenge — Part 6113501April 5, 2020
D'Agapeyeff0VariableOct. 14, 2010
Dorabella0VariableOct. 14, 2010
Kryptos0VariableOct. 14, 2010
World Record Challenge: Break 65 Bits of AES012974Oct. 14, 2010
Recovering the Private Key in the Fully Homomorphic Encryption Scheme012981Jan. 14, 2011
Twelve-Year-Old Murder Case0VariableApril 7, 2011
Kaskade-S/T — Part 401077May 5, 2011
Digital Signatures: DSA with Medium Fields013000Sept. 2, 2011
The third ENIGMA M4 message0VariableSept. 21, 2011
RSA Factoring Challenge: RSA-260013014Feb. 7, 2012
RSA Factoring Challenge: RSA-270013014Feb. 7, 2012
RSA Factoring Challenge: RSA-896013014Feb. 7, 2012
RSA Factoring Challenge: RSA-280013014Feb. 7, 2012
RSA Factoring Challenge: RSA-290013014Feb. 7, 2012
RSA Factoring Challenge: RSA-300013014Feb. 7, 2012
RSA Factoring Challenge: RSA-309013014Feb. 7, 2012
RSA Factoring Challenge: RSA-1024013014Feb. 7, 2012
RSA Factoring Challenge: RSA-310013014Feb. 7, 2012
RSA Factoring Challenge: RSA-320013014Feb. 7, 2012
RSA Factoring Challenge: RSA-330013014Feb. 7, 2012
RSA Factoring Challenge: RSA-340013014Feb. 7, 2012
RSA Factoring Challenge: RSA-350013014Feb. 7, 2012
RSA Factoring Challenge: RSA-360013014Feb. 7, 2012
RSA Factoring Challenge: RSA-370013014Feb. 7, 2012
RSA Factoring Challenge: RSA-380013014Feb. 7, 2012
RSA Factoring Challenge: RSA-390013014Feb. 7, 2012
RSA Factoring Challenge: RSA-400013014Feb. 7, 2012
RSA Factoring Challenge: RSA-410013014Feb. 7, 2012
RSA Factoring Challenge: RSA-420013014Feb. 7, 2012
RSA Factoring Challenge: RSA-430013014Feb. 7, 2012
RSA Factoring Challenge: RSA-440013014Feb. 7, 2012
RSA Factoring Challenge: RSA-450013014Feb. 7, 2012
RSA Factoring Challenge: RSA-460013014Feb. 7, 2012
RSA Factoring Challenge: RSA-1536013014Feb. 7, 2012
RSA Factoring Challenge: RSA-470013014Feb. 7, 2012
RSA Factoring Challenge: RSA-480013014Feb. 7, 2012
RSA Factoring Challenge: RSA-490013014Feb. 7, 2012
RSA Factoring Challenge: RSA-500013014Feb. 7, 2012
RSA Factoring Challenge: RSA-617013014Feb. 7, 2012
RSA Factoring Challenge: RSA-2048013014Feb. 7, 2012
ORYX Stream Cipher — Part 4d013062June 27, 2013
Double Column Transposition Reloaded — Part 1013080Dec. 11, 2013
Double Column Transposition Reloaded — Part 2013080Dec. 11, 2013
Double Column Transposition Reloaded — Part 3013080Dec. 11, 2013
Spanish Strip Cipher — Part 30VariableMarch 27, 2014
ORYX Stream Cipher — Part 4c013094April 14, 2014
Double-Column Transposition/Granit — Part 101086July 1, 2015
Double-Column Transposition/Granit — Part 201086July 1, 2015
Double-Column Transposition/Granit — Part 301086July 1, 2015
Spirale — Part 4013154Aug. 23, 2015
Weakened Granit — Part 201087Sept. 24, 2015
Weakened Granit — Part 301087Sept. 24, 2015
ASAC — A Strong(er) ADFGVX Cipher — Part 301089July 9, 2016
ASAC — A Strong(er) ADFGVX Cipher — Part 401089July 9, 2016
ASAC — A Strong(er) ADFGVX Cipher — Part 501089July 9, 2016
"The Road" — Part 301099Dec. 8, 2018
The Vatican Challenge — Part 30VariableJune 25, 2019
The Vatican Challenge — Part 50VariableJuly 7, 2019
The Heavy T52 Sturgeon Challenge — Part 8013507April 24, 2020
A Heavy SZ42 Challenge – Part 14014140Dec. 30, 2022
The Hutton Cipher – Part 501213Oct. 16, 2023

Currently 41 guests and 0 members are online.
Powered by the CrypTool project
Contact | Privacy | Imprint
© 2009-2024 MysteryTwister team