Polyalphabetic substitution - One Time Pad

60 Points  0x0

A Perfect cipher only if…

Author

Thanat0s,  

Level  Difficulty

Validations

389 Challengers 1%

Note  Notation

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141 Votes

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Challenge Results Challenge Results

Pseudo Challenge Lang Date
luk0t Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 1 August 2025 at 04:52
ap10 Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 31 July 2025 at 12:29
lch0 Cryptanalysis  Polyalphabetic substitution - One Time Pad en 26 July 2025 at 22:24
machpi Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 21 July 2025 at 16:46
Arthur Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 3 July 2025 at 19:13
celi Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 23 June 2025 at 21:18
Globules Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 13 June 2025 at 01:39
Adem0 Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 10 June 2025 at 23:05
croucroute Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 9 June 2025 at 12:37
CometeLotus Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 7 May 2025 at 23:00

challenges 75 Challenges

Results Name Validations Number of points  Explanation for the scores Difficulty  Difficulty Author Note  Notation Solution ↓↑ Date
pas_valide Encoding - ASCII 26% 92932 5 Xartrick 10 4 December 2012
pas_valide Pixel Madness 5% 16462 15 Ryscrow 10 3 February 2011
pas_valide Encoding - UU 20% 71502 5 g0uZ 10 7 October 2006
pas_valide Shift cipher 6% 21195 10 m31z0nyx 10 16 February 2011
pas_valide ELF64 - PID encryption 3% 8191 15 Lu33Y 10 8 February 2012
pas_valide File - Insecure storage 1 3% 9468 20 g0uZ 7 6 February 2012
pas_valide Hash - Message Digest 5 17% 62370 5 g0uZ 7 31 January 2010
pas_valide Monoalphabetic substitution - Polybe 2% 4000 25 koma 6 6 December 2011
pas_valide Code - Pseudo Random Number Generator 2% 3731 20 Tosh 6 19 December 2012
pas_valide File - PKZIP 4% 13473 15 g0uZ 6 30 August 2010
pas_valide Initialisation Vector 1% 2310 25 manticore , notfound404 6 25 August 2015
pas_valide System - Android lock pattern 2% 7082 20 Silentd 5 23 December 2012
pas_valide Monoalphabetic substitution - Caesar 5% 16982 15 Arod 5 22 October 2011
pas_valide Service - Timing attack 1% 2947 25 g0uZ , koma 5 28 October 2012
pas_valide Known plaintext - XOR 3% 9501 20 Ryscrow 5 3 February 2011
pas_valide RSA - Factorisation 2% 5129 25 HacKSpider 5 12 September 2010
pas_valide AES - CBC - Bit-Flipping Attack 1% 1695 25 Tie21 5 17 June 2018
pas_valide RSA - Multiple recipients 1% 1669 40 franb 4 29 November 2015
pas_valide RSA - Decipher Oracle 1% 2097 25 Zweisamkeit 4 11 May 2017
pas_valide AES - ECB 1% 2766 25 cez40 4 29 November 2015
pas_valide Hash - SHA-2 9% 32959 5 koma 4 3 June 2012
pas_valide Transposition - Rail Fence 2% 6670 20 YellowS4 4 6 April 2014
pas_valide Polyalphabetic substitution - Vigenère 3% 10670 20 Arod 3 26 October 2011
pas_valide Discrete logarithm problem 1% 1337 40 RFC4949 3 8 June 2014
pas_valide RSA - Common modulus 1% 2082 30 franb 3 24 December 2016
pas_valide OTP - Implementation error 1% 489 30 Podalirius 3 22 March 2021
pas_valide Circular Bit Shift 1% 1766 20 BlackRaven 3 21 March 2023
pas_valide White-Box Cryptography 1% 256 60 Cryptanalyse 3 21 October 2018
pas_valide CISCO - Salted Password 2% 5638 10 Tidusrose 3 13 July 2021
pas_valide ECDHE 1% 249 60 Tosh 2 20 November 2016
pas_valide AES128 - CTR 1% 741 40 Tosh 2 28 August 2015
pas_valide ECDSA - Introduction 1% 343 35 Jrmbt 2 22 September 2019
pas_valide Enigma Machine 1% 278 50 peyman 2 12 October 2016
pas_valide Service - CBC Padding 1% 1385 60 koma 2 4 October 2012
pas_valide RSA - Corrupted key 1 1% 459 30 blackndoor 2 28 November 2017
pas_valide Twisted secret 1% 529 25 NonStandardModel 2 14 August 2020
pas_valide Hash - LM 3% 8633 5 Podalirius 2 13 July 2021
pas_valide LFSR - Known plaintext 1% 1098 25 Brissouille 2 28 November 2017
pas_valide Hash - NT 2% 6964 5 Podalirius 2 13 July 2021
pas_valide File - PKZIP 2 1% 356 20 kevin.mille 2 8 November 2024
pas_valide GEDEFU 1% 581 30 makhno 1 13 September 2016
pas_valide RSA - Lee cooper 1% 171 60 blackndoor , Synacktiv 1 7 November 2019
pas_valide Hash - DCC 3% 8892 5 Podalirius 1 13 July 2021
pas_valide AES - Weaker variant 1% 152 70 Cryptanalyse 1 29 August 2018
pas_valide Hill Cipher 1% 234 30 LetMeR00t 1 21 March 2023
pas_valide AES - Fault attack #1 1% 207 50 Cryptanalyse 1 20 September 2018
pas_valide Encoding - Codebook 1% 459 20 n3rada 1 21 March 2023
pas_valide RSA - Corrupted key 2 1% 335 40 blackndoor 1 11 January 2018
pas_valide Hash - SHA-3 1% 164 75 Revenger 1 10 December 2016
pas_valide AES - ECB - Copy Paste 1% 350 25 Vozec 1 5 February 2024
pas_valide Shamir Secret Sharing - Traitor 1% 104 35 Vozec 1 5 February 2024
pas_valide RSA - Signature 1% 212 35 sar 1 9 March 2020
pas_valide AES - Fault attack #2 1% 149 80 Cryptanalyse 1 20 September 2018
pas_valide Shamir Secret Sharing - Irreducible ? 1% 38 90 Mister7F 1 5 February 2024
pas_valide DSA - Implementation error 1% 80 25 Vozec 1 13 December 2024
pas_valide Shamir Secret Sharing - Introduction 1% 363 30 Vozec 1 5 February 2024
pas_valide Service - Hash length extension attack 1% 1195 30 koma 1 19 August 2015
pas_valide RSA - Continued fractions 1% 1527 30 sambecks 1 8 September 2015
pas_valide Hash - DCC2 3% 8171 5 Podalirius 1 13 July 2021
pas_valide Shamir Secret Sharing - Reduction 1% 52 70 Vozec 0 5 February 2024
pas_valide AES-PMAC 1% 42 100 Cryptanalyse 0 26 May 2019
pas_valide Polyalphabetic substitution - One Time Pad 1% 389 60 Thanat0s 0 2 June 2013
pas_valide Side Channel - AES : first round 1% 96 60 walafc0 0 28 March 2022
pas_valide FEAL - Differential Cryptanalysis 1% 52 50 Tosh 0 28 March 2022
pas_valide RSA - H-rabin 1% 92 60 Vozec 0 21 March 2023
pas_valide NTRU | Weak Parameter 1% 21 60 Vozec 0 13 December 2024
pas_valide NTRU | Multiple Transmission 1% 30 60 Vozec 0 13 December 2024
pas_valide Side Channel - AES : CPA 1% 93 50 cb34 0 28 March 2022
pas_valide Goldreich Goldwasser Halevi | Weak Parameter 1% 23 50 Vozec 0 13 December 2024
pas_valide RSA - Corrupted key 3 1% 200 40 blackndoor 0 5 September 2019
pas_valide PHP - mt_rand 1% 176 40 NonStandardModel 0 28 March 2022
pas_valide RSA - Padding 1% 299 35 Tosh 0 9 October 2016
pas_valide ElGamal - Fault attack (Introduction) 1% 41 35 Vozec 0 13 December 2024
pas_valide AES - 4 Rounds 1% 368 35 Cryptanalyse 0 5 September 2018
pas_valide ECDSA - Implementation error 1% 70 100 Tosh 0 29 September 2019