Polyalphabetic substitution - One Time Pad

60 Points  

A Perfect cipher only if…

Author

Thanat0s,  

Level  Difficulty

Validations

263 Challengers 1%

Note  Notation

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75 Votes
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Solution  Solution

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Challenge Results Challenge Results

Pseudo Challenge Lang date
Greytarkis   Polyalphabetic substitution - One Time Pad en 15 October 2019 at 13:57
Forgi   Substitution polyalphabétique - Masque jetable fr 15 October 2019 at 10:19
luffy()   Substitution polyalphabétique - Masque jetable fr 12 October 2019 at 09:39
DSpiricate   Substitution polyalphabétique - Masque jetable fr 3 October 2019 at 11:32
10function   Substitution polyalphabétique - Masque jetable fr 18 September 2019 at 17:22
macz   Polyalphabetic substitution - One Time Pad en 13 September 2019 at 21:04
nopid   Polyalphabetic substitution - One Time Pad en 6 September 2019 at 12:16
VioletBaudelaire   Substitution polyalphabétique - Masque jetable fr 27 August 2019 at 17:28
Sacriyana   Substitution polyalphabétique - Masque jetable fr 5 August 2019 at 11:17
Cryptanalyse   Polyalphabetic substitution - One Time Pad en 3 August 2019 at 11:11

Challenges associated with this section 47 Challenges

Results Challenge's Name Validations Number of points  Explanation for the scores Difficulty  Difficulty Author Note  Notation Solution
pas_valide Encoding - ASCII 26% 38792 5 Xartrick 10
pas_valide Encoding - UU 20% 30722 5 g0uZ 10
pas_valide Hash - Message Digest 5 21% 31450 5 g0uZ 6
pas_valide Hash - SHA-2 11% 15680 5 koma 4
pas_valide Shift cipher 7% 9342 10 m31z0nyx 5
pas_valide Pixel Madness 5% 7516 15 Ryscrow 10
pas_valide ELF64 - PID encryption 3% 4281 15 Lu33Y 10
pas_valide File - PKZIP 4% 5526 15 g0uZ 5
pas_valide Monoalphabetic substitution - Caesar 5% 7190 15 Arod 4
pas_valide Known plaintext - XOR 3% 4480 20 Ryscrow 4
pas_valide Code - Pseudo Random Number Generator 2% 1691 20 Tosh 5
pas_valide File - Insecure storage 1 4% 4920 20 g0uZ 5
pas_valide Polyalphabetic substitution - Vigenère 4% 4864 20 Arod 3
pas_valide System - Android lock pattern 3% 3121 20 Silentd 3
pas_valide Transposition - Rail Fence 2% 2946 20 YellowS4 2
pas_valide AES - CBC - Bit-Flipping Attack 1% 334 25 Tie21 1
pas_valide AES - ECB 1% 1241 25 cez40 4
pas_valide LFSR - Known plaintext 1% 253 25 Brissouille 1
pas_valide RSA - Factorisation 2% 2041 25 HacKSpider 4
pas_valide RSA - Decipher Oracle 1% 563 25 Zweisamkeit 3
pas_valide Service - Timing attack 1% 1475 25 g0uZ, koma 3
pas_valide Monoalphabetic substitution - Polybe 2% 1691 25 koma 6
pas_valide Initialisation Vector 1% 920 25 manticore, notfound 3
pas_valide GEDEFU 1% 297 30 makhno 1
pas_valide RSA - Corrupted key 1 1% 131 30 blackndoor 2
pas_valide RSA - Continued fractions 1% 701 30 sambecks 1
pas_valide RSA - Common modulus 1% 658 30 franb 2
pas_valide Service - Hash length extension attack 1% 433 30 koma 1
pas_valide AES - 4 Rounds 1% 99 35 Cryptanalyse 0
pas_valide ECDSA - Introduction 1% 38 35 Jrmbt 0
pas_valide RSA - Padding 1% 128 35 Tosh 0
pas_valide AES128 - CTR 1% 385 40 Tosh 1
pas_valide Discrete logarithm problem 1% 508 40 Thanat0s, RFC4949 3
pas_valide RSA - Corrupted key 2 1% 96 40 blackndoor 0
pas_valide RSA - Corrupted key 3 1% 33 40 blackndoor 0
pas_valide RSA - Multiple recipients 1% 589 40 franb 3
pas_valide AES - Fault attack #1 1% 50 50 Cryptanalyse 1
pas_valide Enigma Machine 1% 109 50 peyman 1
pas_valide ECDHE 1% 115 60 Tosh 2
pas_valide Service - CBC Padding 1% 627 60 koma 1
pas_valide Polyalphabetic substitution - One Time Pad 1% 263 60 Thanat0s 0
pas_valide White-Box Cryptography 1% 87 60 Cryptanalyse 2
pas_valide AES - Weaker variant 1% 36 70 Cryptanalyse 0
pas_valide Hash - SHA-3 1% 59 75 Revenger 1
pas_valide AES - Fault attack #2 1% 34 80 Cryptanalyse 0
pas_valide AES-PMAC 1% 8 100 Cryptanalyse 0
pas_valide ECDSA - Implementation error 1% 9 100 Tosh 0