Polyalphabetic substitution - One Time Pad

60 Points  0x0

A Perfect cipher only if…

Author

Thanat0s,  

Level  Difficulty

Validations

271 Challengers 1%

Note  Notation

1
2
3
4
5
77 Votes

To reach this part of the site please login

  Solution

Submit a solution

Challenge Results Challenge Results

Pseudo Challenge Lang date
rumik   Polyalphabetic substitution - One Time Pad 16 February 2020 at 20:54
blueshit   Substitution polyalphabétique - Masque jetable 7 February 2020 at 01:41
vpkc   Substitution polyalphabétique - Masque jetable 6 February 2020 at 09:15
Kkameleon   Substitution polyalphabétique - Masque jetable 5 February 2020 at 23:25
xant0me   Substitution polyalphabétique - Masque jetable 17 January 2020 at 15:32
mjuuum   Polyalphabetic substitution - One Time Pad 5 January 2020 at 18:41
Sicriss   Substitution polyalphabétique - Masque jetable 13 November 2019 at 14:34
erk3   Substitution polyalphabétique - Masque jetable 21 October 2019 at 23:35
Greytarkis   Polyalphabetic substitution - One Time Pad 15 October 2019 at 13:57
Forgi   Substitution polyalphabétique - Masque jetable 15 October 2019 at 10:19

 48 Challenges

Results Name Validations Number of points  Explanation for the scores Difficulty  Difficulty Author Note  Notation Solution
pas_valide Encoding - ASCII 26% 43864 5 Xartrick 10
pas_valide Encoding - UU 21% 34604 5 g0uZ 10
pas_valide Hash - Message Digest 5 21% 35220 5 g0uZ 6
pas_valide Hash - SHA-2 11% 17810 5 koma 4
pas_valide Shift cipher 7% 10719 10 m31z0nyx 7
pas_valide Pixel Madness 5% 8543 15 Ryscrow 10
pas_valide ELF64 - PID encryption 3% 4781 15 Lu33Y 10
pas_valide File - PKZIP 4% 6346 15 g0uZ 6
pas_valide Monoalphabetic substitution - Caesar 5% 8126 15 Arod 4
pas_valide Known plaintext - XOR 3% 5027 20 Ryscrow 5
pas_valide Code - Pseudo Random Number Generator 2% 1891 20 Tosh 5
pas_valide File - Insecure storage 1 4% 5362 20 g0uZ 5
pas_valide Polyalphabetic substitution - Vigenère 4% 5495 20 Arod 3
pas_valide System - Android lock pattern 3% 3538 20 Silentd 4
pas_valide Transposition - Rail Fence 2% 3353 20 YellowS4 3
pas_valide AES - CBC - Bit-Flipping Attack 1% 447 25 Tie21 1
pas_valide AES - ECB 1% 1407 25 cez40 4
pas_valide LFSR - Known plaintext 1% 347 25 Brissouille 1
pas_valide RSA - Factorisation 2% 2317 25 HacKSpider 5
pas_valide RSA - Decipher Oracle 1% 691 25 Zweisamkeit 3
pas_valide Service - Timing attack 1% 1585 25 g0uZ, koma 3
pas_valide Monoalphabetic substitution - Polybe 2% 1904 25 koma 6
pas_valide Initialisation Vector 1% 1045 25 manticore, notfound404 5
pas_valide GEDEFU 1% 330 30 makhno 1
pas_valide RSA - Corrupted key 1 1% 163 30 blackndoor 2
pas_valide RSA - Continued fractions 1% 785 30 sambecks 1
pas_valide RSA - Common modulus 1% 786 30 franb 2
pas_valide Service - Hash length extension attack 1% 488 30 koma 1
pas_valide AES - 4 Rounds 1% 124 35 Cryptanalyse 0
pas_valide ECDSA - Introduction 1% 87 35 Jrmbt 0
pas_valide RSA - Padding 1% 146 35 Tosh 0
pas_valide AES128 - CTR 1% 421 40 Tosh 1
pas_valide Discrete logarithm problem 1% 569 40 Thanat0s, RFC4949 3
pas_valide RSA - Corrupted key 2 1% 115 40 blackndoor 0
pas_valide RSA - Corrupted key 3 1% 56 40 blackndoor 0
pas_valide RSA - Multiple recipients 1% 690 40 franb 3
pas_valide AES - Fault attack #1 1% 67 50 Cryptanalyse 1
pas_valide Enigma Machine 1% 118 50 peyman 1
pas_valide ECDHE 1% 128 60 Tosh 2
pas_valide RSA - Lee cooper 1% 40 60 blackndoor, Synacktiv 0
pas_valide Service - CBC Padding 1% 711 60 koma 1
pas_valide Polyalphabetic substitution - One Time Pad 1% 271 60 Thanat0s 0
pas_valide White-Box Cryptography 1% 92 60 Cryptanalyse 3
pas_valide AES - Weaker variant 1% 42 70 Cryptanalyse 1
pas_valide Hash - SHA-3 1% 63 75 Revenger 1
pas_valide AES - Fault attack #2 1% 48 80 Cryptanalyse 1
pas_valide AES-PMAC 1% 10 100 Cryptanalyse 0
pas_valide ECDSA - Implementation error 1% 16 100 Tosh 0