Polyalphabetic substitution - One Time Pad

60 Points  0x0

A Perfect cipher only if…

Author

Thanat0s,  

Level  Difficulty

Validations

299 Challengers 1%

Note  Notation

1
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4
5
88 Votes

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Challenge Results Challenge Results

Pseudo Challenge Lang date
rene-d   Substitution polyalphabétique - Masque jetable 9 January 2021 at 07:08
Mirasio   Substitution polyalphabétique - Masque jetable 21 December 2020 at 22:26
Amel   Substitution polyalphabétique - Masque jetable 13 December 2020 at 12:20
Podalirius   Substitution polyalphabétique - Masque jetable 7 December 2020 at 22:37
Mayus   Substitution polyalphabétique - Masque jetable 18 November 2020 at 22:28
mr27   Substitution polyalphabétique - Masque jetable 17 November 2020 at 22:59
Didouad   Polyalphabetic substitution - One Time Pad 21 October 2020 at 21:54
gwel   Substitution polyalphabétique - Masque jetable 19 October 2020 at 17:46
NilDead   Substitution polyalphabétique - Masque jetable 15 October 2020 at 10:05
ChoumouLeZouave   Substitution polyalphabétique - Masque jetable 30 September 2020 at 16:58

 50 Challenges

Results Name Validations Number of points  Explanation for the scores Difficulty  Difficulty Author Note  Notation Solution
pas_valide Encoding - ASCII 26% 52966 5 Xartrick 10
pas_valide Encoding - UU 21% 41566 5 g0uZ 10
pas_valide Hash - Message Digest 5 21% 41926 5 g0uZ 6
pas_valide Hash - SHA-2 11% 21529 5 koma 4
pas_valide Shift cipher 7% 13150 10 m31z0nyx 8
pas_valide Pixel Madness 6% 10344 15 Ryscrow 10
pas_valide ELF64 - PID encryption 3% 5521 15 Lu33Y 10
pas_valide File - PKZIP 4% 7748 15 g0uZ 6
pas_valide Monoalphabetic substitution - Caesar 5% 9812 15 Arod 4
pas_valide Known plaintext - XOR 3% 5880 20 Ryscrow 5
pas_valide Code - Pseudo Random Number Generator 2% 2281 20 Tosh 5
pas_valide File - Insecure storage 1 4% 6147 20 g0uZ 5
pas_valide Polyalphabetic substitution - Vigenère 4% 6520 20 Arod 3
pas_valide System - Android lock pattern 3% 4279 20 Silentd 4
pas_valide Transposition - Rail Fence 2% 3951 20 YellowS4 3
pas_valide AES - CBC - Bit-Flipping Attack 1% 726 25 Tie21 2
pas_valide AES - ECB 1% 1651 25 cez40 4
pas_valide LFSR - Known plaintext 1% 495 25 Brissouille 1
pas_valide RSA - Factorisation 2% 2779 25 HacKSpider 5
pas_valide RSA - Decipher Oracle 1% 932 25 Zweisamkeit 3
pas_valide Service - Timing attack 1% 1834 25 g0uZ, koma 4
pas_valide Monoalphabetic substitution - Polybe 2% 2314 25 koma 6
pas_valide Twisted secret 1% 117 25 NonStandardModel 1
pas_valide Initialisation Vector 1% 1259 25 manticore, notfound404 5
pas_valide GEDEFU 1% 414 30 makhno 1
pas_valide RSA - Corrupted key 1 1% 232 30 blackndoor 2
pas_valide RSA - Continued fractions 1% 941 30 sambecks 1
pas_valide RSA - Common modulus 1% 1006 30 franb 2
pas_valide Service - Hash length extension attack 1% 625 30 koma 1
pas_valide AES - 4 Rounds 1% 165 35 Cryptanalyse 0
pas_valide ECDSA - Introduction 1% 137 35 Jrmbt 2
pas_valide RSA - Padding 1% 181 35 Tosh 0
pas_valide RSA - Signature 1% 71 35 s4r 1
pas_valide AES128 - CTR 1% 471 40 Tosh 1
pas_valide Discrete logarithm problem 1% 684 40 Thanat0s, RFC4949 3
pas_valide RSA - Corrupted key 2 1% 156 40 blackndoor 0
pas_valide RSA - Corrupted key 3 1% 77 40 blackndoor 0
pas_valide RSA - Multiple recipients 1% 843 40 franb 3
pas_valide AES - Fault attack #1 1% 89 50 Cryptanalyse 1
pas_valide Enigma Machine 1% 152 50 peyman 2
pas_valide ECDHE 1% 149 60 Tosh 2
pas_valide RSA - Lee cooper 1% 72 60 blackndoor, Synacktiv 0
pas_valide Service - CBC Padding 1% 820 60 koma 1
pas_valide Polyalphabetic substitution - One Time Pad 1% 299 60 Thanat0s 0
pas_valide White-Box Cryptography 1% 114 60 Cryptanalyse 3
pas_valide AES - Weaker variant 1% 58 70 Cryptanalyse 1
pas_valide Hash - SHA-3 1% 82 75 Revenger 1
pas_valide AES - Fault attack #2 1% 66 80 Cryptanalyse 1
pas_valide AES-PMAC 1% 11 100 Cryptanalyse 0
pas_valide ECDSA - Implementation error 1% 21 100 Tosh 0