PDFBlackbox VCL 10.0
License: Commercial
![PDFBlackbox VCL](https://cdn.softsilo.com/screenshots/93/original/793.jpg)
ith help of PDFBlackbox your Delphi, C++Builder or FreePascal application can n* Sign and verify PDF documents using RSA public keys and X.509 certificatesn* Encrypt and decrypt PDF documents using RSA public keys and X.509 certificatesn* Encrypt and decrypt PDF documents using symmetric keys (passwords, passphrases)n* Timestamp PDF documents n* Perform operations using keys stored on cryptographic hardware (USB cryptotokens and smartcards)n* Compress the documents, being processed, using ZLib compression algorithmn* Handle huge PDF documents without significant memory requirementsnnPDFBlackbox components are a clean-room implementation of PDF format specification, which don't use any third-party libraries for core functionality. nnVCL edition of PDFBlackbox can be used with Delphi 5 to Delphi XE3, C++Builder 2007 to C++Builder XE3, FreePascal 2.6 and later.