Polyalphabetic substitution - One Time Pad

60 Points  

A Perfect cipher only if…

Author

Thanat0s,  

Level  Difficulty

Validations

243 Challengers 1%

Note  Notation

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64 Votes
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Solution  Solution

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Challenge Results Challenge Results

Pseudo Challenge Lang date
kais fayech   Substitution polyalphabétique - Masque jetable fr 22 March 2019 at 03:47
0xpwn3r   Substitution polyalphabétique - Masque jetable fr 21 March 2019 at 14:56
yeahaaa   Substitution polyalphabétique - Masque jetable fr 17 March 2019 at 23:17
n0ctis   Substitution polyalphabétique - Masque jetable fr 10 March 2019 at 12:40
rootedUser   Substitution polyalphabétique - Masque jetable fr 27 February 2019 at 06:58
Mysteri0   Substitution polyalphabétique - Masque jetable fr 22 February 2019 at 15:30
Kurt   Polyalphabetic substitution - One Time Pad en 31 January 2019 at 12:14
Tna   Substitution polyalphabétique - Masque jetable fr 30 January 2019 at 17:10
yudrihomlo   Polyalphabetic substitution - One Time Pad en 25 January 2019 at 00:44
benoit   Polyalphabetic substitution - One Time Pad en 5 January 2019 at 08:55

Challenges associated with this section 43 Challenges

Results Challenge's Name Validations Number of points  Explanation for the scores Difficulty  Difficulty Author Note  Notation Solution
pas_valide Encoding - ASCII 27% 32697 5 Xartrick 10
pas_valide Encoding - UU 21% 26023 5 g0uZ 10
pas_valide Hash - Message Digest 5 22% 26729 5 g0uZ 6
pas_valide Hash - SHA-2 11% 13340 5 koma 3
pas_valide Shift cipher 7% 7927 10 m31z0nyx 5
pas_valide Pixel Madness 6% 6406 15 Ryscrow 10
pas_valide ELF64 - PID encryption 3% 3755 15 Lu33Y 10
pas_valide File - PKZIP 4% 4747 15 g0uZ 5
pas_valide Monoalphabetic substitution - Caesar 5% 6226 15 Arod 4
pas_valide Known plaintext - XOR 4% 3908 20 Ryscrow 4
pas_valide Code - Pseudo Random Number Generator 2% 1470 20 Tosh 5
pas_valide File - Insecure storage 1 4% 4495 20 g0uZ 5
pas_valide Polyalphabetic substitution - Vigenère 4% 4239 20 Arod 3
pas_valide System - Android lock pattern 3% 2689 20 Silentd 3
pas_valide Transposition - Rail Fence 3% 2522 20 YellowS4 2
pas_valide AES - CBC - Bit-Flipping Attack 1% 171 25 Tie21 1
pas_valide AES - ECB 1% 1067 25 cez40 4
pas_valide LFSR - Known plaintext 1% 156 25 Brissouille 1
pas_valide RSA - Factorisation 2% 1740 25 HacKSpider 4
pas_valide RSA - Decipher Oracle 1% 422 25 Zweisamkeit 3
pas_valide Service - Timing attack 2% 1316 25 g0uZ, koma 3
pas_valide Monoalphabetic substitution - Polybe 2% 1469 25 koma 6
pas_valide Initialisation Vector 1% 769 25 manticore, notfound 3
pas_valide GEDEFU 1% 244 30 makhno 1
pas_valide RSA - Corrupted key V1 1% 98 30 blackndoor 2
pas_valide RSA - Continued fractions 1% 602 30 sambecks 1
pas_valide RSA - Common modulus 1% 519 30 franb 2
pas_valide Service - Hash length extension attack 1% 353 30 koma 1
pas_valide AES - 4 Rounds 1% 66 35 Cryptanalyse 0
pas_valide RSA - Padding 1% 112 35 Tosh 0
pas_valide AES128 - CTR 1% 349 40 Tosh 1
pas_valide Discrete logarithm problem 1% 449 40 Thanat0s, RFC4949 3
pas_valide RSA - Corrupted key V2 1% 76 40 blackndoor 0
pas_valide RSA - Multiple recipients 1% 507 40 franb 3
pas_valide AES - Fault attack #1 1% 32 50 Cryptanalyse 1
pas_valide Enigma Machine 1% 94 50 peyman 1
pas_valide ECDHE 1% 97 60 Tosh 2
pas_valide Service - CBC Padding 1% 554 60 koma 1
pas_valide Polyalphabetic substitution - One Time Pad 1% 243 60 Thanat0s 0
pas_valide White-Box Cryptography 1% 56 60 Cryptanalyse 2
pas_valide AES - Weaker variant 1% 25 70 Cryptanalyse 0
pas_valide Hash - SHA-3 1% 54 75 Revenger 1
pas_valide AES - Fault attack #2 1% 23 80 Cryptanalyse 0