Home›Cryptographic Algorithm›Invented By Company›IBMBrowse ByIBMFactsIBMSourcesComments (0)Reader Challenges (0)FactsComparisonEra of EmergenceWell-attested1900 BCE 1IBMFilter Results2 entriesCategoryAllBlock Cipher (2)Time ComplexityAllLinear Time -- O(n) (1)Invented ByAllHorst Feistel (2)GroupAllBlock Cipher (2)Credited ToAllHorst Feistel (2)ACM AreaAllCryptography (2)Show ResultsBrowseCompareSelect all 2Data Encryption Standard AlgorithmIBMLucifer (cipher)IBMSources1. Wikipedia: Cryptographytier 2WikipediaCryptography, History section, earliest-use sentenceQuote, Cryptography, History section, earliest-use sentenceThe earliest known use of cryptography is some carved ciphertext on stone in Egypt (c. 1900 BCE), but this may have been done for the amusement of literate observers rather than as a way of concealing information.View the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.