Cryptanalysis Cryptanalysis

Break encryption algorithms

These tests will allow you to hone your cryptography skills. You will be faced with an encoded data. The challenge is to find the type of encoding or encryption and revert it back to find the solution.

Prerequisites:

– Knowledge of most common encoding formats.
– Knowledge of most common hash algorithms and ciphers.
– Knowledge of a scripting language.

challenges 75 Challenges

Results Name Validations Number of points ↓↑  Explanation for the scores Difficulty  Difficulty Author Note  Notation Solution Date
pas_valide ECDSA - Implementation error 1% 67 100 Tosh 0 29 September 2019
pas_valide AES-PMAC 1% 40 100 Cryptanalyse 0 26 May 2019
pas_valide Shamir Secret Sharing - Irreducible ? 1% 35 90 Mister7F 0 5 February 2024
pas_valide AES - Fault attack #2 1% 145 80 Cryptanalyse 1 20 September 2018
pas_valide Hash - SHA-3 1% 162 75 Revenger 1 10 December 2016
pas_valide Shamir Secret Sharing - Reduction 1% 50 70 Vozec 0 5 February 2024
pas_valide AES - Weaker variant 1% 151 70 Cryptanalyse 1 29 August 2018
pas_valide RSA - H-rabin 1% 90 60 Vozec 0 21 March 2023
pas_valide ECDHE 1% 245 60 Tosh 2 20 November 2016
pas_valide NTRU | Multiple Transmission 1% 28 60 Vozec 0 13 December 2024
pas_valide NTRU | Weak Parameter 1% 21 60 Vozec 0 13 December 2024
pas_valide Polyalphabetic substitution - One Time Pad 1% 385 60 Thanat0s 0 2 June 2013
pas_valide RSA - Lee cooper 1% 168 60 blackndoor , Synacktiv 1 7 November 2019
pas_valide Service - CBC Padding 1% 1382 60 koma 2 4 October 2012
pas_valide Side Channel - AES : first round 1% 94 60 walafc0 0 28 March 2022
pas_valide White-Box Cryptography 1% 254 60 Cryptanalyse 3 21 October 2018
pas_valide FEAL - Differential Cryptanalysis 1% 50 50 Tosh 0 28 March 2022
pas_valide AES - Fault attack #1 1% 202 50 Cryptanalyse 1 20 September 2018
pas_valide Enigma Machine 1% 276 50 peyman 2 12 October 2016
pas_valide Goldreich Goldwasser Halevi | Weak Parameter 1% 21 50 Vozec 0 13 December 2024
pas_valide Side Channel - AES : CPA 1% 91 50 cb34 0 28 March 2022
pas_valide RSA - Multiple recipients 1% 1664 40 franb 4 29 November 2015
pas_valide RSA - Corrupted key 3 1% 196 40 blackndoor 0 5 September 2019
pas_valide RSA - Corrupted key 2 1% 333 40 blackndoor 1 11 January 2018
pas_valide Discrete logarithm problem 1% 1332 40 RFC4949