Polyalphabetic substitution - One Time Pad

60 Points  0x0

A Perfect cipher only if…

Author

Thanat0s,  

Level  Difficulty

Validations

377 Challengers 1%

Note  Notation

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135 Votes

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Challenge Results Challenge Results

Pseudo Challenge Lang Date
Sk4r Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 23 January 2025 at 13:38
sansong Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 20 January 2025 at 15:59
GoZ Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 3 January 2025 at 16:46
tedi_v Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 20 September 2024 at 22:52
Sirius14 Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 20 September 2024 at 16:36
glx1036 Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 28 July 2024 at 14:07
Caesard Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 3 July 2024 at 19:38
Jella Cryptanalysis  Polyalphabetic substitution - One Time Pad en 14 June 2024 at 17:55
sp4r1ng Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 17 April 2024 at 21:28
0rcruxe Cryptanalyse  Substitution polyalphabétique - Masque jetable fr 24 January 2024 at 07:40

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% 89413 5 Xartrick 10 4 December 2012
pas_valide Encoding - UU 20% 68931 5 g0uZ 10 7 October 2006
pas_valide Hash - DCC 3% 7799 5 Podalirius 1 13 July 2021
pas_valide Hash - DCC2 3% 7225 5 Podalirius 1 13 July 2021
pas_valide Hash - LM 3% 7696 5 Podalirius 1 13 July 2021
pas_valide Hash - Message Digest 5 18% 60581 5 g0uZ 7 31 January 2010
pas_valide Hash - NT 2% 6195 5 Podalirius 1 13 July 2021
pas_valide Hash - SHA-2 10% 31908 5 koma 4 3 June 2012
pas_valide Shift cipher 6% 20313 10 m31z0nyx 10 16 February 2011
pas_valide CISCO - Salted Password 2% 5045 10 Tidusrose 3 13 July 2021
pas_valide Pixel Madness 5% 15863 15 Ryscrow 10 3 February 2011
pas_valide ELF64 - PID encryption 3% 7879 15 Lu33Y 10 8 February 2012
pas_valide File - PKZIP 4% 12797 15 g0uZ 6 30 August 2010
pas_valide Monoalphabetic substitution - Caesar 5% 16172 15 Arod 5 22 October 2011
pas_valide Circular Bit Shift 1% 1337 20 BlackRaven 3 21 March 2023
pas_valide Known plaintext - XOR 3% 8993 20 Ryscrow 5 3 February 2011
pas_valide Code - Pseudo Random Number Generator 1% 3486 20 Tosh 6 19 December 2012
pas_valide Encoding - Codebook 1% 345 20 n3rada 1 21 March 2023
pas_valide File - PKZIP 2 1% 168 20 kevin.mille 2 8 November 2024
pas_valide File - Insecure storage 1 3% 9156 20 g0uZ 7 6 February 2012
pas_valide Polyalphabetic substitution - Vigenère 3% 10242 20 Arod 3 26 October 2011
pas_valide System - Android lock pattern 2% 6766 20 Silentd 5 23 December 2012
pas_valide Transposition - Rail Fence 2% 6347 20 YellowS4 4 6 April 2014
pas_valide AES - CBC - Bit-Flipping Attack 1% 1621 25 Tie21 5 17 June 2018
pas_valide AES - ECB 1% 2634 25 cez40 4 29 November 2015
pas_valide AES - ECB - Copy Paste 1% 285 25 Vozec 1 5 February 2024
pas_valide DSA - Implementation error 1% 10 25 Vozec 0 13 December 2024
pas_valide LFSR - Known plaintext 1% 1011 25 Brissouille 2 28 November 2017
pas_valide RSA - Factorisation 2% 4840 25 HacKSpider 5 12 September 2010
pas_valide RSA - Decipher Oracle 1% 1981 25 Zweisamkeit 4 11 May 2017
pas_valide Service - Timing attack 1% 2839 25 g0uZ , koma 4 28 October 2012
pas_valide Monoalphabetic substitution - Polybe 2% 3837 25 koma 6 6 December 2011
pas_valide Twisted secret 1% 476 25 NonStandardModel 1 14 August 2020
pas_valide Initialisation Vector 1% 2166 25 manticore , notfound404 6 25 August 2015
pas_valide Hill Cipher 1% 196 30 LetMeR00t 1 21 March 2023
pas_valide GEDEFU 1% 563 30 makhno 1 13 September 2016
pas_valide OTP - Implementation error 1% 445 30 Podalirius 3 22 March 2021
pas_valide RSA - Corrupted key 1 1% 435 30 blackndoor 2 28 November 2017
pas_valide RSA - Continued fractions 1% 1440 30 sambecks 1 8 September 2015
pas_valide RSA - Common modulus 1% 1968 30 franb 3 24 December 2016
pas_valide Service - Hash length extension attack 1% 1160 30 koma 1 19 August 2015
pas_valide Shamir Secret Sharing - Introduction 1% 288 30 Vozec 1 5 February 2024
pas_valide AES - 4 Rounds 1% 345 35 Cryptanalyse 0 5 September 2018
pas_valide ECDSA - Introduction 1% 316 35 Jrmbt 2 22 September 2019
pas_valide ElGamal - Fault attack (Introduction) 1% 8 35 Vozec 0 13 December 2024
pas_valide RSA - Padding 1% 283 35 Tosh 0 9 October 2016
pas_valide RSA - Signature 1% 188 35 sar 1 9 March 2020
pas_valide Shamir Secret Sharing - Traitor 1% 82 35 Vozec 1 5 February 2024
pas_valide AES128 - CTR 1% 697 40 Tosh 2 28 August 2015
pas_valide PHP - mt_rand 1% 148 40 NonStandardModel 0 28 March 2022
pas_valide Discrete logarithm problem 1% 1255 40 RFC4949 3 8 June 2014
pas_valide RSA - Corrupted key 2 1% 316 40 blackndoor 1 11 January 2018
pas_valide RSA - Corrupted key 3 1% 184 40 blackndoor 0 5 September 2019
pas_valide RSA - Multiple recipients 1% 1588 40 franb 4 29 November 2015
pas_valide AES - Fault attack #1 1% 185 50 Cryptanalyse 1 20 September 2018
pas_valide FEAL - Differential Cryptanalysis 1% 44 50 Tosh 0 28 March 2022
pas_valide Goldreich Goldwasser Halevi | Weak Parameter 1% 2 50 Vozec 0 13 December 2024
pas_valide Enigma Machine 1% 255 50 peyman 2 12 October 2016
pas_valide Side Channel - AES : CPA 1% 77 50 cb34 0 28 March 2022
pas_valide ECDHE 1% 240 60 Tosh 2 20 November 2016
pas_valide NTRU | Multiple Transmission 1% 12 60 Vozec 0 13 December 2024
pas_valide NTRU | Weak Parameter 1% 2 60 Vozec 0 13 December 2024
pas_valide RSA - H-rabin 1% 83 60 Vozec 0 21 March 2023
pas_valide RSA - Lee cooper 1% 157 60 blackndoor , Synacktiv 1 7 November 2019
pas_valide Service - CBC Padding 1% 1327 60 koma 2 4 October 2012
pas_valide Side Channel - AES : first round 1% 78 60 walafc0 0 28 March 2022
pas_valide Polyalphabetic substitution - One Time Pad 1% 377 60 Thanat0s 0 2 June 2013
pas_valide White-Box Cryptography 1% 233 60 Cryptanalyse 3 21 October 2018
pas_valide AES - Weaker variant 1% 142 70 Cryptanalyse 1 29 August 2018
pas_valide Shamir Secret Sharing - Reduction 1% 40 70 Vozec 0 5 February 2024
pas_valide Hash - SHA-3 1% 158 75 Revenger 1 10 December 2016
pas_valide AES - Fault attack #2 1% 131 80 Cryptanalyse 1 20 September 2018
pas_valide Shamir Secret Sharing - Irreducible ? 1% 28 90 Mister7F 0 5 February 2024
pas_valide AES-PMAC 1% 38 100 Cryptanalyse 0 26 May 2019
pas_valide ECDSA - Implementation error 1% 64 100 Tosh 0 29 September 2019