GEDEFU

30 Points

June 2, 1918, he decrypts an important message to win the First World War

Author

makhno, 13 September 2016

Level

Validations

0 Challengers 1%

Note

68 Votes

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1 Solution

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Challenge Results

Pseudo	Challenge	Lang	Date
jrjgjk	GEDEFU		2 April 2021 at 19:33
23euros	GEDEFU		2 April 2021 at 19:33
Brissouille	GEDEFU		18 March 2021 at 16:32
K1ng0fBl0nd3$	GEDEFU		14 March 2021 at 01:02
SoEasY	GEDEFU		11 March 2021 at 20:54
knacky	GEDEFU		10 March 2021 at 23:01
Maxou_	GEDEFU		3 March 2021 at 10:26
EF115_bmkiet	GEDEFU		26 February 2021 at 12:52
ber98fa4a	GEDEFU		21 February 2021 at 16:48
Deunis	GEDEFU		17 February 2021 at 19:06

51 Challenges

Results	Name	Validations	Number of points	Difficulty	Author	Note	Solution	Date
	Encoding - ASCII	26% 55723	5		Xartrick		10	4 December 2012
	Encoding - UU	21% 43503	5		g0uZ		10	7 October 2006
	Hash - Message Digest 5	21% 43753	5		g0uZ		7	31 January 2010
	Hash - SHA-2	11% 22518	5		koma		4	3 June 2012
	Shift cipher	7% 13739	10		m31z0nyx		9	16 February 2011
	Pixel Madness	6% 10849	15		Ryscrow		10	3 February 2011
	ELF64 - PID encryption	3% 5691	15		Lu33Y		10	8 February 2012
	File - PKZIP	4% 8095	15		g0uZ		6	30 August 2010
	Monoalphabetic substitution - Caesar	5% 10193	15		Arod		4	22 October 2011
	Known plaintext - XOR	3% 6087	20		Ryscrow		5	3 February 2011
	Code - Pseudo Random Number Generator	2% 2369	20		Tosh		5	19 December 2012
	File - Insecure storage 1	3% 6322	20		g0uZ		6	6 February 2012
	Polyalphabetic substitution - Vigenère	4% 6773	20		Arod		3	26 October 2011
	System - Android lock pattern	3% 4452	20		Silentd		4	23 December 2012
	Transposition - Rail Fence	2% 4135	20		YellowS4		3	6 April 2014
	AES - CBC - Bit-Flipping Attack	1% 796	25		Tie21		2	17 June 2018
	AES - ECB	1% 1703	25		cez40		4	29 November 2015
	LFSR - Known plaintext	1% 528	25		Brissouille		1	28 November 2017
	RSA - Factorisation	2% 2899	25		HacKSpider		5	12 September 2010
	RSA - Decipher Oracle	1% 1006	25		Zweisamkeit		3	11 May 2017
	Service - Timing attack	1% 1913	25		g0uZ		4	28 October 2012
	Monoalphabetic substitution - Polybe	2% 2423	25		koma		6	6 December 2011
	Twisted secret	1% 153	25		NonStandardModel		1	14 August 2020
	Initialisation Vector	1% 1305	25		manticore		5	25 August 2015
	GEDEFU	1% 424	30		makhno		1	13 September 2016
	OTP - Implementation error	1% 11	30		Podalirius		2	22 March 2021
	RSA - Corrupted key 1	1% 245	30		blackndoor		2	28 November 2017
	RSA - Continued fractions	1% 973	30		sambecks		1	8 September 2015
	RSA - Common modulus	1% 1067	30		franb		2	24 December 2016
	Service - Hash length extension attack	1% 660	30		koma		1	19 August 2015
	AES - 4 Rounds	1% 178	35		Cryptanalyse		0	5 September 2018
	ECDSA - Introduction	1% 157	35		Jrmbt		2	22 September 2019
	RSA - Padding	1% 187	35		Tosh		0	9 October 2016
	RSA - Signature	1% 78	35		s4r		1	9 March 2020
	AES128 - CTR	1% 485	40		Tosh		2	28 August 2015
	Discrete logarithm problem	1% 723	40		RFC4949		3	8 June 2014
	RSA - Corrupted key 2	1% 164	40		blackndoor		0	11 January 2018
	RSA - Corrupted key 3	1% 85	40		blackndoor		0	5 September 2019
	RSA - Multiple recipients	1% 890	40		franb		3	29 November 2015
	AES - Fault attack #1	1% 93	50		Cryptanalyse		1	20 September 2018
	Enigma Machine	1% 159	50		peyman		2	12 October 2016
	ECDHE	1% 159	60		Tosh		2	20 November 2016
	RSA - Lee cooper	1% 75	60		blackndoor		1	7 November 2019
	Service - CBC Padding	1% 851	60		koma		1	4 October 2012
	Polyalphabetic substitution - One Time Pad	1% 312	60		Thanat0s		0	2 June 2013
	White-Box Cryptography	1% 120	60		Cryptanalyse		3	21 October 2018
	AES - Weaker variant	1% 80	70		Cryptanalyse		1	29 August 2018
	Hash - SHA-3	1% 108	75		Revenger		1	10 December 2016
	AES - Fault attack #2	1% 69	80		Cryptanalyse		1	20 September 2018
	AES-PMAC	1% 13	100		Cryptanalyse		0	26 May 2019
	ECDSA - Implementation error	1% 22	100		Tosh		0	29 September 2019