Problems

1 – 20 of 20

Problem Title Likes Solvers Difficulty

Problem 1151. Decrypt Polybius

Created by: Mehmet OZC

Tags decrypt, cryptography, polybius

Problem 45282. Cryptography with A Square Matrix : Decoding

Created by: Mehmet OZC

Tags encoding, matrix, cryptography

Problem 1150. Polybius Square

Created by: Mehmet OZC

Tags encrypt, cryptography, polybius

Problem 751. Implement simple rotation cypher

Created by: Doug Hull

Tags encoding, cipher, asee

989

Problem 1953. Simple Caesar Cypher - shift encrypt a message given an index number

Created by: Tyler

Tags cryptography

Problem 45279. Cryptography with A Square Matrix : Encoding

Created by: Mehmet OZC

Tags encoding, matrix, cryptography

Problem 44961. RSA decryption

Created by: David Hill

Tags cryptography, rsa decryption

Problem 44959. RSA encryption using public key

Created by: David Hill

Tags cryptography, rsa encryption

Problem 44351. Code breaker, Part I: Operation Phoenix

Created by: David Verrelli

Tags speed, cipher, cryptography

Problem 44963. Mask Generation Function (MGF1) for PKCS #1 Standard utilizing Optimal Asymmetric Encryption Padding for RSA Cryptography

Created by: David Hill

Tags cryptography, hash, mgf1

Problem 78. Implement a ROT13 cipher

Created by: Cody Team

Tags matlab, encoding, cipher

926

Problem 44356. Code breaker, Part II: Operation Orthos

Created by: David Verrelli

Tags speed, cipher, cryptography

Problem 44956. Determine RSA keys (public and private) given two prime number character strings (p and q)

Created by: David Hill

Tags cryptography, large integer calculations

Problem 44964. Optimal Asymmetric Encryption Padding of message for RSA Cryptography

Created by: David Hill

Tags cryptography, rsa, oaep

Problem 44965. Optimal Asymmetric Encryption Padding decoding of message for RSA Cryptography

Created by: David Hill

Tags cryptography, rsa, optimal asymmetric encryption padding

Problem 44383. Code breaker, Part III: Operation Xiangliu

Created by: David Verrelli

Tags speed, cipher, cryptography

Problem 44924. Create State Array for initiating SHA-3-224 Hash

Created by: David Hill

Tags cryptography, sha-3, hash

Problem 45213. AES-256 KeyExpansion()

Created by: David Hill

Tags cryptography, advanced encryption standard

Problem 45212. AES MixColumns() Transformation

Created by: David Hill

Tags cryptography, advanced encryption standard

Problem 45211. AES SubBytes() Transformation

Created by: David Hill

Tags cryptography, advanced encryption standard

1 – 20 of 20

Trial software

Difficulty Rating

Problem Groups

Problems

Problem 1151. Decrypt Polybius

Problem 45282. Cryptography with A Square Matrix : Decoding

Problem 1150. Polybius Square

Problem 751. Implement simple rotation cypher

Problem 1953. Simple Caesar Cypher - shift encrypt a message given an index number

Problem 45279. Cryptography with A Square Matrix : Encoding

Problem 44961. RSA decryption

Problem 44959. RSA encryption using public key

Problem 44351. Code breaker, Part I: Operation Phoenix

Problem 44963. Mask Generation Function (MGF1) for PKCS #1 Standard utilizing Optimal Asymmetric Encryption Padding for RSA Cryptography

Problem 78. Implement a ROT13 cipher

Problem 44356. Code breaker, Part II: Operation Orthos

Problem 44956. Determine RSA keys (public and private) given two prime number character strings (p and q)

Problem 44964. Optimal Asymmetric Encryption Padding of message for RSA Cryptography

Problem 44965. Optimal Asymmetric Encryption Padding decoding of message for RSA Cryptography

Problem 44383. Code breaker, Part III: Operation Xiangliu

Problem 44924. Create State Array for initiating SHA-3-224 Hash

Problem 45213. AES-256 KeyExpansion()

Problem 45212. AES MixColumns() Transformation

Problem 45211. AES SubBytes() Transformation