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Challenge list

Level	Name	Solves
1	Classical Ciphers^3	196
1	A Secret Message from Castle Mansfeld	135
2	Alice's Birthday Party (Part 1)	330
2	Alice's Birthday Party (Part 2)	316
X	D'Agapeyeff	0
X	Dorabella	0
X	Double Column Transposition	2
X	Kryptos	0
1	Letter from the Alleged Countess Julie von Ortenburg	183
2	Not-so-Secret Message from Malawi — Part I (RSA)	216
2	Not-so-Secret Message from Malawi — Part II (ECC)	44
X	Notes of an Italian Soldier	4
3	RSA with Special d	25
X	Beale Ciphers	1
X	Unknown Author	2
1	Number Sequence	4639
1	Monoalphabetic Substitution	576
X	Ku Klux Klan	43
3	World Record Challenge: Break 65 Bits of AES	0
2	ORYX Stream Cipher Part I	81
2	ORYX Stream Cipher Part II	49
1	Zodiac Cipher	108
2	Enigma Part 1	136
2	Enigma Part 2	96
3	Sigaba Part 2	5
2	Brute-Force-Attack on Triple-DES with Reduced Key Space	221
2	Sigaba Part 1	18
1	A modified homophonic cipher with reduced alphabets — Part 1	419
1	A modified homophonic cipher with reduced alphabets — Part 2	363
1	Caesar Encryption	1569
1	Molehunt (Part 1/3)	166
1	Molehunt (Part 2/3)	157
2	Molehunt (Part 3/3)	87
2	Smartcard RSA	79
2	Purple 1	21
2	Hybrid Encryption I	185
1	One-Time Pad with Flaws	330
1	Enigma Combinatorics	112
2	Akelarre Part 1	11
2	CMEA 1	47
3	CMEA 2	30
1	Original Caesar Cipher	3310
1	Playfair Encryption	138
2	Lunchtime Attack on the Fully Homomorphic Encryption Scheme	49
3	Recovering the Private Key in the Fully Homomorphic Encryption Scheme	0
1	Kaskade-S/T — Part 1	111
2	Kaskade-S/T — Part 2	55
2	Kaskade-S/T — Part 3	38
2	Lattice Part 1	35
2	Cracking SHA1-Hashed Passwords	644
X	Twelve-Year-Old Murder Case	0
1	Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 1	104
2	Post-Quantum Cryptography: Unbalanced Oil and Vinegar System — Part 2	12
2	Kaskade-S/T — Part 4	0
2	Kaskade-S/T — Part 5	10
1	Music Code — Part 1	44
2	Music Code — Part 2	43
3	Substitution Cipher with Non-Prefix Codes	1
1	Number Sequence — Part 2	2295
2	Broadcasting and low exponent — RSA Attack	254
2	RSA: Two different keys — same ciphertext	162
1	ADFGVX — Part 1	128
1	ADFGVX — Part 2	131
3	Digital Signatures: DSA with Medium Fields	0
2	Unusual encryption using a diophantine equation	70
1	Modified Caesar Cipher	256
1	Pigpen with a twist — Part 1	165
2	Pigpen with a twist — Part 2	47
2	Pigpen with a twist — Part 3	44
2	A really long number sequence	124
1	Affine Codes / Modulo Arithmetic with N / Extended Euclid	640
X	The third ENIGMA M4 message	0
1	Double Columnar Transposition	127
1	Grille Cipher	533
1	An Invisible Message	67
1	Turing Bombe Enigma I	83
1	Factorization Cipher — Part 1	544
1	Monoalphabetic substitution with camouflage — Part 1	71
2	Unconcealed RSA messages	55
2	Factorization Cipher — Part 2	156
2	Monoalphabetic substitution with camouflage — Part 2	58
2	Monoalphabetic substitution with camouflage — Part 3	54
1	Monoalphabetic substitution with camouflage — Part 4	54
2	Factorization Cipher — Part 3	100
2	AES key — encoded in the machine readable zone of a European ePassport	87
2	RSA Factoring Challenge: RSA-210	64
2	RSA Factoring Challenge: RSA-220	47
2	RSA Factoring Challenge: RSA-230	40
3	RSA Factoring Challenge: RSA-232	29
3	RSA Factoring Challenge: RSA-240	29
3	RSA Factoring Challenge: RSA-250	28
3	RSA Factoring Challenge: RSA-260	0
3	RSA Factoring Challenge: RSA-270	0
3	RSA Factoring Challenge: RSA-896	0
3	RSA Factoring Challenge: RSA-280	0
3	RSA Factoring Challenge: RSA-290	0
3	RSA Factoring Challenge: RSA-300	0
3	RSA Factoring Challenge: RSA-309	0
3	RSA Factoring Challenge: RSA-1024	0
3	RSA Factoring Challenge: RSA-310	0
3	RSA Factoring Challenge: RSA-320	0
3	RSA Factoring Challenge: RSA-330	0
3	RSA Factoring Challenge: RSA-340	0
3	RSA Factoring Challenge: RSA-350	0
3	RSA Factoring Challenge: RSA-360	0
3	RSA Factoring Challenge: RSA-370	0
3	RSA Factoring Challenge: RSA-380	0
3	RSA Factoring Challenge: RSA-390	0
3	RSA Factoring Challenge: RSA-400	0
3	RSA Factoring Challenge: RSA-410	0
3	RSA Factoring Challenge: RSA-420	0
3	RSA Factoring Challenge: RSA-430	0
3	RSA Factoring Challenge: RSA-440	0
3	RSA Factoring Challenge: RSA-450	0
3	RSA Factoring Challenge: RSA-460	0
3	RSA Factoring Challenge: RSA-1536	0
3	RSA Factoring Challenge: RSA-470	0
3	RSA Factoring Challenge: RSA-480	0
3	RSA Factoring Challenge: RSA-490	0
3	RSA Factoring Challenge: RSA-500	0
3	RSA Factoring Challenge: RSA-617	0
3	RSA Factoring Challenge: RSA-2048	0
2	Partial Key Exposure with RSA — Part 1	97
1	ECDH-Key Exchange for Beginners	105
2	Monoalphabetic Substitution with Camouflage — Part 5	36
1	The Book Code: A Challenge for Bookworms	161
1	Number Sequence — Part 3	1103
1	¿No Hablas Español? No problemo!	184
1	Number Sequence — Part 4	914
1	Number Sequence — Part 5	115
X	Concealed Messages — Vigenère's Night Sky	16
2	Keyshanc — Part 1	51
2	Keyshanc — Part 2	42
1	How do you become a big cryptographer?	249
1	An 'unhearable' message	45
2	Monoalphabetic Substitution with Camouflage — Part 6	2
1	Letter to the Templars — Part 1	1104
1	Letter to the Templars — Part 2	883
1	Beaver Code	1300
2	BCR code (Book-Caesar-RSA)	77
2	Letter to the Templars — Part 3	748
1	Recycled One-Time Pad	77
1	Strange Message from Thessaloniki	53
1	A hidden word	927
1	Playfair with hints about the grid	127
1	Enigma Messages	89
1	Cascading Encryption — Part 1/3	79
1	Multilingual Monoalphabetic Substitution	88
2	Typex — Part 1	31
1	Reserve Hand Procedure — Part 1	205
2	Cascading Encryption — Part 2/3	24
2	Cascading Encryption — Part 3/3	16
2	Typex — Part 2	25
1	Snow White and the seven dwarfs	316
2	ORYX Stream Cipher — Part 3 (revised)	31
3	ORYX Stream Cipher — Part 4d	0
2	RSA Factoring Challenge: RSA-704	69
1	Nils away on travel	190
1	Hill Cipher with Sudoku Key	116
1	From Russia with Love	316
1	Enigma Messages with Repeated Letters — Part 1	191
1	Trifid Cipher	138
1	Enigma Messages with Repeated Letters — Part 2	96
3	Double Column Transposition Reloaded — Part 1	0
3	Double Column Transposition Reloaded — Part 2	0
3	Double Column Transposition Reloaded — Part 3	0
1	Enigma Messages with Repeated Letters — Part 3	97
1	Enigma Messages with Repeated Letters — Part 4	88
1	Enigma Messages with Repeated Letters — Part 5	90
2	Spanish Strip Cipher — Part 1	37
2	Spanish Strip Cipher — Part 2	34
X	Spanish Strip Cipher — Part 3	0
2	Double Column Transposition — Part 1	35
2	ORYX Stream Cipher — Part 4a	12
3	ORYX Stream Cipher — Part 4b	2
3	ORYX Stream Cipher — Part 4c	0
2	Double Column Transposition — Part 3	42
2	Double Column Transposition — Part 2	49
2	Double Column Transposition — Part 4	54
2	Double Column Transposition — Part 5	9
1	M-138 — Part 1	243
1	Heartbleed — Part 1	90
1	Heartbleed — Part 2	60
2	Heartbleed — Part 3	33
2	M-138 — Part 2	148
2	M-138 — Part 3	69
1	The Last Note	113
2	M-138 — Part 4	33
2	Handycipher — Part 1	6
2	Handycipher — Part 2	8
3	Handycipher — Part 3	7
1	Number Sequence — Part 6	185
1	Number Sequence — Part 7	107
2	Extended Handycipher — Part 1	3
2	Extended Handycipher — Part 2	3
2	Extended Handycipher — Part 3	3
1	A hidden word — Part 2	127
2	Weakened Handycipher — Part 1	17
2	Weakened Handycipher — Part 2	15
2	Weakened Handycipher — Part 3	15
2	Double-Column Transposition/Granit — Part 1	0
2	Double-Column Transposition/Granit — Part 2	0
2	Double-Column Transposition/Granit — Part 3	0
2	Flawed Usage of a OTP Cipher by the BND	20
2	Spirale — Part 1	8
2	Spirale — Part 2	8
2	Spirale — Part 3	6
3	Spirale — Part 4	0
1	Number Sequence — Part 8	447
1	Weakened Granit — Part 1	52
2	Weakened Granit — Part 2	0
2	Weakened Granit — Part 3	0
1	News from Castle Mansfeld	62
1	Image Noise	184
1	New Year's Greetings — Part 1	55
1	New Year's Greetings — Part 2	51
1	New Year's Greetings — Part 3	49
1	New Year's Greetings — Part 4	46
2	New Year's Greetings — Part 5	16
3	Handycipher — Part 4	4
3	Handycipher — Part 5	5
3	Handycipher — Part 6	5
3	Extended Handycipher — Part 4	3
3	Extended Handycipher — Part 5	3
3	Extended Handycipher — Part 6	2
2	Weakened Handycipher — Part 4	6
2	Weakened Handycipher — Part 5	6
2	Weakened Handycipher — Part 6	6
2	ASAC — A Strong(er) ADFGVX Cipher — Part 1	20
2	ASAC — A Strong(er) ADFGVX Cipher — Part 2	1
2	ASAC — A Strong(er) ADFGVX Cipher — Part 3	0
2	ASAC — A Strong(er) ADFGVX Cipher — Part 4	0
2	ASAC — A Strong(er) ADFGVX Cipher — Part 5	0
3	Handycipher — Part 7	2
3	Handycipher — Part 8	3
3	Handycipher — Part 9	3
2	Hilly — Part 1	9
2	Holographic Encryption — Part 1	8
2	Holographic Encryption — Part 2	3
2	Kaskade-S/T — Part 6 (RansomKaskade Part 1)	6
3	ElsieFour — Part 1	4
2	Weakened ElsieFour — Part 3	4
2	Hilly — Part 2	1
1	Number Sequence — Part 9	139
1	Advent-Challenge — Part 1	561
2	Advent-Challenge — Part 2	60
2	AES ECB Wrong Encoding	29
2	Advent Challenge — Part 3	51
2	Advent Challenge — Part 4	47
2	The Einstein Enigma	66
X	The Vatican Challenge — Part 1	3
X	The Vatican Challenge — Part 2	3
1	Number Sequence — Part 10	134
2	Weakened ElsieFour — Part 1	6
2	Weakened ElsieFour — Part 2	1
2	Summer Job	63
2	Fastest in the West	41
2	Trendy Messenger	37
1	Modular Sequences	95
1	Autokey Cipher	221
2	Breaking a Filter Generator	22
1	Cryptanalysis Hacking Puzzles — Part 1	37
X	Catherine of Aragon's Letter to King Ferdinand, her Father (1509)	2
2	"The Road" — Part 1	9
2	"The Road" — Part 2	2
2	"The Road" — Part 3	0
1	Cryptanalysis Hacking Puzzles — Part 2	236
2	Monoalphabetic Substitution with Nostradamus Flavor	44
2	Handycipher made in love — Part 1	29
2	Homophonic Encryption — Part 1	51
2	Homophonic Encryption — Part 2	46
2	Homophonic Encryption — Part 3	44
2	Homophonic Encryption — Part 4	43
2	Handycipher made in love — Part 2	23
2	Handycipher — Part 10	1
X	The Vatican Challenge — Part 3	0
X	The Vatican Challenge — Part 4	1
X	The Vatican Challenge — Part 5	0
2	The T52 Sturgeon Challenge — Part 1	21
2	The T52 Sturgeon Challenge — Part 2	20
2	The T52 Sturgeon Challenge — Part 3	16
2	The T52 Sturgeon Challenge — Part 4	14
2	The T52 Sturgeon Challenge — Part 8	11
2	The T52 Sturgeon Challenge — Part 9	9
2	The T52 Sturgeon Challenge — Part 10	9
2	The T52 Sturgeon Challenge — Part 11	10
2	The T52 Sturgeon Challenge — Part 12	10
2	The T52 Sturgeon Challenge — Part 5	8
2	The T52 Sturgeon Challenge — Part 6	8
2	The T52 Sturgeon Challenge — Part 7	8
2	A Cloaked Substitution Cipher — Part 1	24
2	A Cloaked Substitution Cipher — Part 2	23
3	The Heavy T52 Sturgeon Challenge — Part 1	2
3	The Heavy T52 Sturgeon Challenge — Part 2	3
3	The Heavy T52 Sturgeon Challenge — Part 3	3
2	Cipher ID — Part 1	19
2	Polyphonic Substitution Cipher — Part 1	26
2	Christmas Challenge 2019: Differential Cryptanalysis — Part 1	5
2	Polyphonic Substitution Cipher — Part 2	24
2	Differential Cryptanalysis — Part 2	5
2	The LoRa Cipher: Logic Randomness — Part 1	29
2	The SIGABA Challenge — Part 1	11
2	The SIGABA Challenge — Part 2	10
3	The SIGABA Challenge — Part 3	6
3	The SIGABA Challenge — Part 4	5
1	Polyhomophonic Substitution — Part 1	62
3	The SIGABA Challenge — Part 5	2
2	Polyhomophonic Substitution — Part 2	34
3	The SIGABA Challenge — Part 6	1
2	Polyhomophonic Substitution — Part 3	20
3	The Heavy T52 Sturgeon Challenge — Part 4	6
3	The Heavy T52 Sturgeon Challenge — Part 5	7
3	The Heavy T52 Sturgeon Challenge — Part 6	5
3	The Heavy T52 Sturgeon Challenge — Part 7	8
3	The Heavy T52 Sturgeon Challenge — Part 8	0
3	The Heavy T52 Sturgeon Challenge — Part 9	3
1	Lightweight Introduction to Lattices — Part 1	65
1	Lightweight Introduction to Lattices — Part 2	46
2	Lightweight Introduction to Lattices — Part 3	39
2	The SZ42 Challenge — Part 1	20
2	The SZ42 Challenge — Part 2	20
2	The SZ42 Challenge — Part 3	17
2	The SZ42 Challenge — Part 4	18
2	The SZ42 Challenge — Part 5	17
2	The SZ42 Challenge — Part 6	15
2	The SZ42 Challenge — Part 7	14
1	Find the right route — Part 1	107
2	The SZ42 Challenge — Part 8	15
2	The SZ42 Challenge — Part 9	14
1	Find the right route — Part 2	41
1	Find the right route — Part 3	40
2	The SZ42 Challenge — Part 10	7
2	The SZ42 Challenge — Part 11	4
1	Wheatstone Cryptograph — Part 1	119
2	Wheatstone Cryptograph — Part 2	16
2	SIGABA CSP-889 — Part 1	2
2	SIGABA CSP-889 — Part 2	2
3	SIGABA CSP-889 — Part 3	2
2	SIGABA CSP-2900 — Part 1	2
2	SIGABA CSP-2900 — Part 2	2
3	SIGABA CSP-2900 — Part 3	2
2	The SZ42 Challenge — Part 12	11
2	The SZ42 Challenge — Part 13	10
2	Modified Vigenère Cipher	12
1	Alberti Challenge — Part 1	158
2	Alberti Challenge — Part 2	11
2	Hill Cipher	13
1	Merkle-Hellman Knapsack Challenge - Part 1	81
2	Merkle-Hellman Knapsack Challenge — Part 2	18
1	The Syllabary Cipher – Part 1	284
2	The Syllabary Cipher – Part 2	33
2	The Syllabary Cipher – Part 3	23
2	The Syllabary Cipher – Part 4	15
2	The Syllabary Cipher – Part 5	15
3	A Heavy SZ42 Challenge – Part 14	0
2	The Josse Challenge – Part 1	17
2	The Josse Challenge – Part 2	17
2	The Josse Challenge – Part 3	14
2	The Hutton Cipher – Part 1	24
2	The Hutton Cipher – Part 2	27
2	The Hutton Cipher – Part 3	4
2	The Hutton Cipher – Part 4	4
2	The Hutton Cipher – Part 5	0
1	A disguised code	50
2	Elliptic Boogaloo – Part 1	3
3	Elliptic Boogaloo – Part 2	3
3	Elliptic Boogaloo – Part 3	3
2	PX-1000 Encryption – Part 1	11
2	The Fialka Challenge – Part 1	5
2	The Fialka Challenge – Part 2	4
2	The Fialka Challenge – Part 3	4
2	The Lady Liz Challenge	0