EntityQ2454939· pop 18· linked from 64 articlesHill cipherSign in to savesubstitution cipher based on linear algebraConnectionsencryptionEntityinvertible matrixEntitykey sizeEntitycodeEntitySecure channelEntityprime numberEntitylinear algebraEntitycryptocurrencyEntitycryptographyEntitymatrixEntitypatentEntityvector spaceEntitydeterminantEntityClaude ShannonEntityransomwareEntityEnigmaEntityCaesar cipherEntityhash functionEntitymodular arithmeticEntitypublic-key cryptographyEntityCategoriesClassical ciphers