PlexCrypt protects documents and folders via PKI-based encryption using secured algorithms such as AES, Blowfish, CAST, DES, ElGamal, IDEA, IES, RC4, RC6, RSA, Rijndael, Serpent Skipjack, Twofish, etc. It allows users to encrypt multiple files and folders automatically. PlexCrypt allows users to digital sign documents and folders and use that signature to verify that original document has not been maliciously or accidently altered. It supports MD5WithRSAEncryption, SHA1WithRSA/ISO9796-2, MD2WithRSAEncryption, RIPEMD160WithRSAEncryption, SHA1WithRSAEncryption, RIPEMD160WithRSAEncryption, MD5WithRSA/ISO9796-2 RIPEMD160WithRSA/ISO9796-2, RIPEMD160WithRSA/ISO9796-2 algorithms for digital signatures. PlexCrypt also allows users to archive a set of files and folders in the ZIP format and extract them later. In addition, it allows users to create and manage digital certificates and key-pairs for encryption and digital signatures.