Level I Challenges (85)

Page 1 of the challenges in Level I, ordered by date posted (the most recent appear first).

Lightweight Introduction to Lattices — Part 2

[dimitrov-esslinger-02] - 10 users already solved this challenge.

Lattice-based cryptography schemes are relevant for current post-quantum cryptography research. This challenge series accompanies the basic theory from a chapter of the CrypTool Book called "LIGHTWEIGHT INTRODUCTION TO LATTICES". This part of the challenge series uses vectors to hide a famous quote in modern art. Can you reveal it?

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Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.

Published on: 2020-06-23 23:05

Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank	User (#10)	Achieved points (Global score)	y-m-d - h:m:s

	Kurt Gebauer (Yokozuna)	200 (254983)	2020-06-24 01:42:06
	S (Zyphe)	200 (10811)	2020-06-24 09:52:41
	Dominik M. (Sgt. Pepper)	200 (119136)	2020-06-24 09:55:36
	Armin Krauss (argh)	200 (196814)	2020-06-24 10:00:32
#5	Snake (snk)	200 (179397)	2020-06-24 10:36:03
#6	H. Lautenschlager (helmi)	200 (38435)	2020-06-24 11:27:18
#7	Eugene (lim0n)	200 (115186)	2020-06-24 11:44:34
#8	Alain Collignon (vexilla72)	200 (116902)	2020-06-24 12:58:41
#9	Bernd (tryone144)	150 (3869)	2020-06-25 18:58:43
#10	Viktor (Veselovský)	120 (166147)	2020-06-28 11:13:28

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Lightweight Introduction to Lattices — Part 1

[dimitrov-esslinger-01] - 17 users already solved this challenge, 3 are working on it.

Lattice-based cryptography schemes are relevant for current post-quantum cryptography research. This challenge series accompanies the basic theory from a chapter of the CrypTool Book called "LIGHTWEIGHT INTRODUCTION TO LATTICES". In this part of the challenge series we introduce systems of linear equations to find a hidden message in a picture.

Click here to get to the corresponding forum topic to share your opinion.

Click here to download the challenge.

Authors: This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.

Published on: 2020-05-16 16:03

Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank	User (#17)	Achieved points (Global score)	y-m-d - h:m:s

	Dominik M. (Sgt. Pepper)	200 (119136)	2020-05-16 16:52:00
	Snake (snk)	200 (179397)	2020-05-16 20:07:33
	Armin Krauss (argh)	200 (196814)	2020-05-16 20:32:03
	Eugene (lim0n)	200 (115186)	2020-05-17 12:10:48
#5	Viktor (Veselovský)	200 (166147)	2020-05-17 14:15:42
#6	Nofre Tete (noffi)	150 (23455)	2020-05-18 00:57:46
#7	Mike (RogueRamblers)	133 (55417)	2020-05-18 22:27:35
#8	sarah b (silva)	120 (38114)	2020-05-20 20:02:05
#9	George (Theofanidis)	117 (117369)	2020-05-21 22:11:07
#10	Paula Olsen (paol)	117 (942)	2020-05-22 11:18:41
#11	Alain Collignon (vexilla72)	108 (116902)	2020-05-28 13:30:13
#12	Kurt Gebauer (Yokozuna)	108 (254983)	2020-05-28 13:59:54
#13	H. Lautenschlager (helmi)	108 (38435)	2020-05-28 14:20:02
#14	Benjamin Bartl (arenas)	105 (3680)	2020-06-07 13:24:39
#15	Stephan (Stephje1978)	103 (27064)	2020-06-20 01:42:13
#16	Bernd (tryone144)	102 (3869)	2020-06-25 17:44:57
#17	Em Doulgerakis (Greko)	102 (131640)	2020-07-02 23:25:26

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Polyhomophonic Substitution — Part 1

[madness-01] - 20 users already solved this challenge, 1 is working on it.

This part of the challenge series is a warm-up with homophonic substitution. In a homophonic substitution cipher, there are more than one ciphertext symbol for each plaintext symbol. The key is a mapping.

Click here to get to the corresponding forum topic to share your opinion.

Click here to download the challenge.

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.

Published on: 2020-03-22 01:57

Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank	User (#20)	Achieved points (Global score)	y-m-d - h:m:s

	Viktor (Veselovský)	200 (166147)	2020-03-22 08:47:14
	Eugene (lim0n)	200 (115186)	2020-03-22 10:06:44
	Snake (snk)	200 (179397)	2020-03-22 10:09:36
	Dominik M. (Sgt. Pepper)	200 (119136)	2020-03-22 12:48:30
#5	Kurt Gebauer (Yokozuna)	200 (254983)	2020-03-22 16:33:04
#6	Alain Collignon (vexilla72)	200 (116902)	2020-03-22 19:51:39
#7	Armin Krauss (argh)	200 (196814)	2020-03-22 20:28:19
#8	Michael Möller (michaelm)	200 (221817)	2020-03-22 20:48:55
#9	sarah b (silva)	150 (38114)	2020-03-23 15:05:33
#10	S (Zyphe)	150 (10811)	2020-03-23 17:35:58
#11	J-L Morel (Rossignol)	117 (37723)	2020-03-27 10:42:03
#12	Joerg G. (SnifferMaster)	117 (18271)	2020-03-27 14:06:09
#13	Thomas (Thomas4897)	113 (35941)	2020-03-29 17:27:02
#14	H. Lautenschlager (helmi)	110 (38435)	2020-03-31 13:37:04
#15	George (Theofanidis)	107 (117369)	2020-04-05 16:16:54
#16	Random Dude (rnd)	103 (98653)	2020-04-23 19:15:06
#17	D3d4lu5 (D3d4lu5)	102 (343788)	2020-05-06 18:13:51
#18	Mike (RogueRamblers)	102 (55417)	2020-05-14 01:28:22
#19	Norbert Biermann (Norbert)	102 (47687)	2020-05-24 18:25:37
#20	Em Doulgerakis (Greko)	101 (131640)	2020-07-04 13:03:54

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Cryptanalysis Hacking Puzzles — Part 2

[martins-02] - 106 users already solved this challenge, 29 are working on it.

Solving this challenge is not as hard as finding the needle in a haystack, isn't it?

Click here to get to the corresponding forum topic to share your opinion.

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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.

Published on: 2019-01-09 14:10

Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank	User (#106)	Achieved points (Global score)	y-m-d - h:m:s

	Armin Krauss (argh)	200 (196814)	2019-01-09 15:41:27
	Dominik M. (Sgt. Pepper)	200 (119136)	2019-01-09 16:25:16
	sarah b (silva)	200 (38114)	2019-01-09 20:37:52
	Alain Collignon (vexilla72)	200 (116902)	2019-01-10 08:00:54
#5	Random Dude (rnd)	200 (98653)	2019-01-10 13:53:12
#6	D3d4lu5 (D3d4lu5)	150 (343788)	2019-01-10 22:13:00
#7	S (Zyphe)	133 (10811)	2019-01-11 17:15:04
#8	George (Theofanidis)	133 (117369)	2019-01-11 18:10:41
#9	Michael Möller (michaelm)	125 (221817)	2019-01-12 22:07:19
#10	0e85dc6eaf (0e85dc6eaf)	125 (125)	2019-01-13 13:05:43
#11	j.h. (haegarq)	114 (15352)	2019-01-16 06:17:43
#12	E.T (Ertheb)	107 (81809)	2019-01-22 21:08:13
#13	Lane Williams (planetlane)	105 (26372)	2019-01-31 03:52:34
#14	Klein (rijman)	104 (417)	2019-02-04 19:38:43
#15	Oliver Spiess (AWK-Spiess)	103 (503)	2019-02-10 23:03:31
#16	Pierre Robier (tripleedged)	103 (5916)	2019-02-16 16:59:17
#17	yachoor (yachoor)	103 (103)	2019-02-18 12:09:49
#18	Oliver H (AlfheriH)	102 (804)	2019-02-23 13:20:02
#19	Luigy (Luigy)	102 (402)	2019-03-01 01:12:17
#20	Sergey (vkaser)	102 (902)	2019-03-05 14:17:35
#21	Ulrich Dorobeck (Papageno)	102 (3927)	2019-03-06 16:31:58
#22	Rainer Zufall (kiekuk)	102 (56786)	2019-03-07 09:54:57
#23	Viktor (Veselovský)	102 (166147)	2019-03-10 11:36:16
#24	Snake (snk)	102 (179397)	2019-03-10 13:49:10
#25	Somebody (Achidutzu)	102 (5527)	2019-03-11 15:41:55
#26	Michael (FoM)	102 (38953)	2019-03-14 15:40:07
#27	Thiago Araujo Pereira (thiagoap)	101 (701)	2019-03-21 14:22:15
#28	Joerg G. (SnifferMaster)	101 (18271)	2019-03-22 14:48:50
#29	Jennifer White (Dusty)	101 (501)	2019-03-24 20:38:43
#30	Sebastian Slupina (Grandwizard)	101 (10866)	2019-03-31 23:42:04
#31	Christian (Zettorino)	101 (502)	2019-04-04 10:17:30
#32	Kame Kaze (kamekazeman)	101 (301)	2019-04-17 23:43:59
#33	E41614048 (E41614048)	101 (4063)	2019-04-26 12:04:23
#34	Hughes (hughes)	101 (7925)	2019-04-29 10:49:10
#35	E41614001 (E41614001)	101 (2782)	2019-05-01 17:57:55
#36	E41614018 (E41614018)	101 (6243)	2019-05-02 14:34:13
#37	E41614031 (E41614031)	101 (7526)	2019-05-03 14:15:51
#38	E41614038 (SurgeWong)	101 (1989)	2019-05-04 09:24:17
#39	Pavel Kessler (pavel)	101 (5396)	2019-05-04 23:15:14
#40	Maggie K (Maggiek)	101 (101)	2019-05-06 20:40:00
#41	hi (hellothere)	101 (101)	2019-05-12 14:23:07
#42	Norbert Biermann (Norbert)	101 (47687)	2019-05-17 16:29:31
#43	Manfred (katatonius)	101 (2394)	2019-05-28 11:38:13
#44	Hans Joachim Girulat (joregi)	101 (36278)	2019-05-28 22:20:25
#45	Eugene (lim0n)	101 (115186)	2019-06-12 13:31:56
#46	Chaosdreamer (Chaosdreamer)	101 (101)	2019-06-15 01:28:20
#47	Jeff (Fountain)	101 (8788)	2019-06-15 22:39:45
#48	Vermillion (Vermillion)	101 (401)	2019-06-15 23:20:52
#49	Malte Spiegelberg (Caunthol)	101 (601)	2019-06-16 16:04:18
#50	Danny Higgins (hamster147)	101 (39638)	2019-06-19 13:17:53
#51	newbie (newbies)	101 (101)	2019-06-28 13:19:26
#52	david (sexton)	101 (2801)	2019-06-30 17:50:28
#53	T (Wagner)	101 (16988)	2019-06-30 20:35:00
#54	gerdw (gerdw)	101 (38113)	2019-07-06 22:08:23
#55	Andi (Penticton)	101 (101)	2019-07-10 16:06:53
#56	Egon Hamburger (Seehase)	101 (3746)	2019-07-15 09:42:14
#57	Bart den Hartog (Bart13)	101 (148936)	2019-07-16 00:48:18
#58	kokn3t (kokn3t)	101 (101)	2019-07-22 07:02:11
#59	Kurt Gebauer (Yokozuna)	100 (254983)	2019-07-29 22:37:44
#60	M Koch (Mako)	100 (200)	2019-07-31 17:48:37
#61	J-L Morel (Rossignol)	100 (37723)	2019-08-10 17:49:09
#62	Stephan (Stephje1978)	100 (27064)	2019-08-11 19:22:23
#63	H. Lautenschlager (helmi)	100 (38435)	2019-08-15 23:15:04
#64	Denilson (denilson)	100 (900)	2019-08-23 02:24:37
#65	Alexander Berezhnoy (bereal)	100 (200)	2019-08-24 10:49:40
#66	loseroido (loseroido)	100 (200)	2019-08-28 12:15:45
#67	Mike (RogueRamblers)	100 (55417)	2019-08-29 00:43:08
#68	João Souza (jahjoao)	100 (300)	2019-09-05 19:25:21
#69	Marco (Pacius95)	100 (100)	2019-09-09 18:18:03
#70	zxcnxc (zxcnxc)	100 (100)	2019-09-10 17:43:23
#71	Hugh (hugh)	100 (3957)	2019-09-15 03:38:41
#72	Daniel Walder (ibex)	100 (14672)	2019-09-20 22:47:08
#73	Julian (Lemmynator)	100 (18353)	2019-10-10 11:20:01
#74	Em Doulgerakis (Greko)	100 (131640)	2019-10-19 15:54:34
#75	pcback (langkhach11112)	100 (4860)	2019-10-25 04:45:05
#76	Aris (ArisCrypto)	100 (400)	2019-10-25 16:59:41
#77	knittin (girl)	100 (100)	2019-11-03 07:08:08
#78	ROHIT (blacksnow123)	100 (100)	2019-11-08 13:06:51
#79	POORNAPRAGNA (fiery_wizard)	100 (100)	2019-11-08 13:13:13
#80	Timm Knape (itmm)	100 (5847)	2019-11-10 18:48:57
#81	Hans Peter (hanspeter)	100 (52356)	2019-11-17 14:47:27
#82	Terence (tec)	100 (8237)	2019-11-26 11:58:57
#83	Karl Schutt (günter)	100 (44273)	2019-12-20 15:51:55
#84	Ayushi Panth (Butterfly)	100 (100)	2019-12-30 12:44:33
#85	CHRIS (TWISM)	100 (500)	2020-01-03 21:45:24
#86	Pastor (Pastor)	100 (100)	2020-01-05 01:11:16
#87	Naomi (alittlebitbehind)	100 (100)	2020-01-18 18:28:21
#88	Jasmin (Miles)	100 (8987)	2020-01-19 23:29:19
#89	Dave (foldingChair)	100 (2085)	2020-01-29 12:37:39
#90	Xaav (xaav)	100 (1100)	2020-02-06 17:02:15
#91	clyto (clytorock)	100 (3595)	2020-02-08 01:00:09
#92	Dusan (xxdradus)	100 (40436)	2020-02-14 11:06:51
#93	Helium3 (He3)	100 (100)	2020-02-19 16:33:33
#94	madness (madness)	100 (50496)	2020-02-24 08:05:41
#95	Mir Dim (mir0soft)	100 (79760)	2020-02-29 10:58:16
#96	Kim (GlobalHeJiminy)	100 (300)	2020-03-05 22:04:03
#97	Thomas (Thomas4897)	100 (35941)	2020-03-07 07:54:08
#98	Kaspar (f.kaspar)	100 (200)	2020-03-09 14:08:00
#99	mglarragan (mglarragan)	100 (2391)	2020-03-17 18:45:27
#100	Anabel Roschmann (Beltiona Mousa)	100 (4217)	2020-03-18 04:27:11
#101	Pascal Cotret (Pa0x73cal)	100 (100)	2020-03-21 11:55:44
#102	cworstell (ace2)	100 (6270)	2020-03-21 23:37:16
#103	Gergely Simon (george314)	100 (17850)	2020-05-01 23:50:16
#104	Martin (Ehmpunkt)	100 (1100)	2020-06-06 14:20:04
#105	Will Bonasera (Vermentis)	100 (4089)	2020-06-19 20:41:26
#106	Georgius Stolte (HazmatsFear)	100 (15771)	2020-07-11 09:45:46

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Cryptanalysis Hacking Puzzles — Part 1

[martins-01] - 23 users already solved this challenge, 23 are working on it.

Three messages were delivered — two encrypted, one in clear. Can you solve the puzzle?

Click here to get to the corresponding forum topic to share your opinion.

Click here to download the challenge.

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.

Published on: 2018-10-26 20:33

Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank	User (#23)	Achieved points (Global score)	y-m-d - h:m:s

	Viktor (Veselovský)	200 (166147)	2018-10-26 22:47:28
	D3d4lu5 (D3d4lu5)	200 (343788)	2018-10-27 08:18:21
	Dominik M. (Sgt. Pepper)	200 (119136)	2018-10-27 14:30:52
	Random Dude (rnd)	150 (98653)	2018-10-28 01:43:34
#5	Snake (snk)	150 (179397)	2018-10-28 17:45:23
#6	E.T (Ertheb)	150 (81809)	2018-10-28 18:58:04
#7	Armin Krauss (argh)	117 (196814)	2018-11-01 19:25:26
#8	Rainer Zufall (kiekuk)	113 (56786)	2018-11-03 12:57:49
#9	Kurt Gebauer (Yokozuna)	113 (254983)	2018-11-03 15:32:07
#10	H. Lautenschlager (helmi)	113 (38435)	2018-11-03 17:33:23
#11	Alain Collignon (vexilla72)	111 (116902)	2018-11-04 11:04:29
#12	Hans Peter (hanspeter)	108 (52356)	2018-11-08 18:35:37
#13	Johnatan (RazorBest)	103 (1105)	2018-12-03 17:38:42
#14	Michael (FoM)	102 (38953)	2018-12-27 19:40:37
#15	S (Zyphe)	101 (10811)	2019-01-13 16:47:18
#16	v1k1ng (v1k1ng)	101 (101)	2019-01-21 22:25:16
#17	Hughes (hughes)	101 (7925)	2019-04-30 09:51:16
#18	Hans Joachim Girulat (joregi)	100 (36278)	2019-05-28 15:38:03
#19	Eugene (lim0n)	100 (115186)	2019-06-12 11:03:04
#20	david (sexton)	100 (2801)	2019-07-01 10:52:43
#21	J-L Morel (Rossignol)	100 (37723)	2019-08-10 17:08:53
#22	Luigy (Luigy)	100 (402)	2020-02-09 16:44:05
#23	Mike (RogueRamblers)	100 (55417)	2020-05-18 23:47:00

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