Cryptography and Encryption: An OverviewEncryption Algorithms and TechniquesSymmetric EncryptionAsymmetric EncryptionHashing AlgorithmsSteganographyHardware EncryptionPKI, the Digital Certificate, and Digital SignaturesThe PKI SystemDigital CertificatesDigital SignaturesEncrypted Communication and Cryptography AttacksEncrypted CommunicationCryptography Attacks