PDFBlackbox (VCL Edition) is a comprehensive collection of native components that help you compress, encrypt, sign and compress PDF documents from your Delphi or Kylix applications. Both symmetric and certificate-based (X.509) encryption and signing is supported. PDFBlackbox supports full range of PDF security operations, including * PDF standard password-based data encryption using MD5 + RC4/40 or RC4/128 algorithms;* PDF certificate-based...