Polyalphabetic substitution - One Time Pad

60 Points  0x0

A Perfect cipher only if…

Author

Thanat0s,  

Level  Difficulty

Validations

287 Challengers 1%

Note  Notation

1
2
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4
5
83 Votes

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Challenge Results Challenge Results

Pseudo Challenge Lang date
PiAil   Substitution polyalphabétique - Masque jetable 20 August 2020 at 22:59
Th3G3ntl3man   Substitution polyalphabétique - Masque jetable 20 August 2020 at 21:32
Nyu   Substitution polyalphabétique - Masque jetable 20 August 2020 at 17:49
John Russel   Substitution polyalphabétique - Masque jetable 6 August 2020 at 21:06
sidrana   Substitution polyalphabétique - Masque jetable 31 July 2020 at 19:07
xamina   Substitution polyalphabétique - Masque jetable 31 July 2020 at 19:06
Hiko   Substitution polyalphabétique - Masque jetable 27 July 2020 at 12:44
Tadlos-Nayr   Substitution polyalphabétique - Masque jetable 25 June 2020 at 23:39
tachon   Substitution polyalphabétique - Masque jetable 17 June 2020 at 20:43
nqnt   Substitution polyalphabétique - Masque jetable 31 May 2020 at 14:04

 50 Challenges

Results Name Validations Number of points  Explanation for the scores Difficulty  Difficulty Author Note  Notation Solution
pas_valide Encoding - ASCII 26% 49417 5 Xartrick 10
pas_valide Encoding - UU 21% 38765 5 g0uZ 10
pas_valide Hash - Message Digest 5 21% 39210 5 g0uZ 6
pas_valide Hash - SHA-2 11% 20021 5 koma 4
pas_valide Shift cipher 7% 12212 10 m31z0nyx 8
pas_valide Pixel Madness 5% 9621 15 Ryscrow 10
pas_valide ELF64 - PID encryption 3% 5240 15 Lu33Y 10
pas_valide File - PKZIP 4% 7223 15 g0uZ 6
pas_valide Monoalphabetic substitution - Caesar 5% 9184 15 Arod 4
pas_valide Known plaintext - XOR 3% 5545 20 Ryscrow 5
pas_valide Code - Pseudo Random Number Generator 2% 2123 20 Tosh 5
pas_valide File - Insecure storage 1 4% 5832 20 g0uZ 5
pas_valide Polyalphabetic substitution - Vigenère 4% 6150 20 Arod 3
pas_valide System - Android lock pattern 3% 4002 20 Silentd 4
pas_valide Transposition - Rail Fence 2% 3745 20 YellowS4 3
pas_valide AES - CBC - Bit-Flipping Attack 1% 634 25 Tie21 1
pas_valide AES - ECB 1% 1577 25 cez40 4
pas_valide LFSR - Known plaintext 1% 450 25 Brissouille 1
pas_valide RSA - Factorisation 2% 2597 25 HacKSpider 5
pas_valide RSA - Decipher Oracle 1% 845 25 Zweisamkeit 3
pas_valide Service - Timing attack 1% 1762 25 g0uZ, koma 4
pas_valide Monoalphabetic substitution - Polybe 2% 2177 25 koma 6
pas_valide Twisted secret 1% 50 25 nonstandardmodel 1
pas_valide Initialisation Vector 1% 1188 25 manticore, notfound404 5
pas_valide GEDEFU 1% 393 30 makhno 1
pas_valide RSA - Corrupted key 1 1% 209 30 blackndoor 2
pas_valide RSA - Continued fractions 1% 880 30 sambecks 1
pas_valide RSA - Common modulus 1% 919 30 franb 2
pas_valide Service - Hash length extension attack 1% 578 30 koma 1
pas_valide AES - 4 Rounds 1% 153 35 Cryptanalyse 0
pas_valide ECDSA - Introduction 1% 121 35 Jrmbt 1
pas_valide RSA - Padding 1% 169 35 Tosh 0
pas_valide RSA - Signature 1% 60 35 s4r 1
pas_valide AES128 - CTR 1% 458 40 Tosh 1
pas_valide Discrete logarithm problem 1% 620 40 Thanat0s, RFC4949 3
pas_valide RSA - Corrupted key 2 1% 140 40 blackndoor 0
pas_valide RSA - Corrupted key 3 1% 69 40 blackndoor 0
pas_valide RSA - Multiple recipients 1% 786 40 franb 3
pas_valide AES - Fault attack #1 1% 80 50 Cryptanalyse 1
pas_valide Enigma Machine 1% 143 50 peyman 2
pas_valide ECDHE 1% 143 60 Tosh 2
pas_valide RSA - Lee cooper 1% 61 60 blackndoor, Synacktiv 0
pas_valide Service - CBC Padding 1% 783 60 koma 1
pas_valide Polyalphabetic substitution - One Time Pad 1% 287 60 Thanat0s 0
pas_valide White-Box Cryptography 1% 104 60 Cryptanalyse 3
pas_valide AES - Weaker variant 1% 49 70 Cryptanalyse 1
pas_valide Hash - SHA-3 1% 79 75 Revenger 1
pas_valide AES - Fault attack #2 1% 57 80 Cryptanalyse 1
pas_valide AES-PMAC 1% 11 100 Cryptanalyse 0
pas_valide ECDSA - Implementation error 1% 19 100 Tosh 0