GEDEFU

30 Points  

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

Author

makhno,  

Level  Difficulty

Validations

286 Challengers 1%

Note  Notation

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49 Votes
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Solution 1 Solution

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Challenge Results Challenge Results

Pseudo Challenge Lang date
teemo   GEDEFU fr 16 September 2019 at 17:08
Maestran   GEDEFU fr 15 September 2019 at 16:07
vpkc   GEDEFU fr 12 September 2019 at 17:37
Knowledge   GEDEFU fr 6 September 2019 at 11:34
Pierre   GEDEFU fr 5 September 2019 at 14:40
dtclop1   GEDEFU fr 31 August 2019 at 10:30
mjuuum   GEDEFU en 28 August 2019 at 23:15
Alex   GEDEFU fr 26 August 2019 at 17:03
nonstandardmodel   GEDEFU en 23 August 2019 at 11:22
youpla1   GEDEFU fr 17 August 2019 at 12:20

Challenges associated with this section 45 Challenges

Results Challenge's Name Validations Number of points  Explanation for the scores Difficulty  Difficulty Author Note  Notation Solution
pas_valide Encoding - ASCII 26% 37478 5 Xartrick 10
pas_valide Encoding - UU 21% 29684 5 g0uZ 10
pas_valide Hash - Message Digest 5 21% 30417 5 g0uZ 6
pas_valide Hash - SHA-2 11% 15162 5 koma 4
pas_valide Shift cipher 7% 8959 10 m31z0nyx 5
pas_valide Pixel Madness 5% 7247 15 Ryscrow 10
pas_valide ELF64 - PID encryption 3% 4167 15 Lu33Y 10
pas_valide File - PKZIP 4% 5354 15 g0uZ 5
pas_valide Monoalphabetic substitution - Caesar 5% 6964 15 Arod 4
pas_valide Known plaintext - XOR 3% 4371 20 Ryscrow 4
pas_valide Code - Pseudo Random Number Generator 2% 1656 20 Tosh 5
pas_valide File - Insecure storage 1 4% 4856 20 g0uZ 5
pas_valide Polyalphabetic substitution - Vigenère 4% 4732 20 Arod 3
pas_valide System - Android lock pattern 3% 3042 20 Silentd 3
pas_valide Transposition - Rail Fence 2% 2877 20 YellowS4 2
pas_valide AES - CBC - Bit-Flipping Attack 1% 317 25 Tie21 1
pas_valide AES - ECB 1% 1205 25 cez40 4
pas_valide LFSR - Known plaintext 1% 243 25 Brissouille 1
pas_valide RSA - Factorisation 2% 2000 25 HacKSpider 4
pas_valide RSA - Decipher Oracle 1% 547 25 Zweisamkeit 3
pas_valide Service - Timing attack 1% 1459 25 g0uZ, koma 3
pas_valide Monoalphabetic substitution - Polybe 2% 1651 25 koma 6
pas_valide Initialisation Vector 1% 897 25 manticore, notfound 3
pas_valide GEDEFU 1% 286 30 makhno 1
pas_valide RSA - Corrupted key 1 1% 122 30 blackndoor 2
pas_valide RSA - Continued fractions 1% 685 30 sambecks 1
pas_valide RSA - Common modulus 1% 636 30 franb 2
pas_valide Service - Hash length extension attack 1% 418 30 koma 1
pas_valide AES - 4 Rounds 1% 93 35 Cryptanalyse 0
pas_valide RSA - Padding 1% 126 35 Tosh 0
pas_valide AES128 - CTR 1% 380 40 Tosh 1
pas_valide Discrete logarithm problem 1% 502 40 Thanat0s, RFC4949 3
pas_valide RSA - Corrupted key 2 1% 92 40 blackndoor 0
pas_valide RSA - Corrupted key 3 1% 19 40 blackndoor 0
pas_valide RSA - Multiple recipients 1% 582 40 franb 3
pas_valide AES - Fault attack #1 1% 47 50 Cryptanalyse 1
pas_valide Enigma Machine 1% 106 50 peyman 1
pas_valide ECDHE 1% 114 60 Tosh 2
pas_valide Service - CBC Padding 1% 621 60 koma 1
pas_valide Polyalphabetic substitution - One Time Pad 1% 258 60 Thanat0s 0
pas_valide White-Box Cryptography 1% 78 60 Cryptanalyse 2
pas_valide AES - Weaker variant 1% 33 70 Cryptanalyse 0
pas_valide Hash - SHA-3 1% 58 75 Revenger 1
pas_valide AES - Fault attack #2 1% 33 80 Cryptanalyse 0
pas_valide AES-PMAC 1% 8 100 Cryptanalyse 0