iText Supports Timestamps and Ocsp now
iText 2.1.6 Released on June 16, 2009, and announced the support timestamps and ocsp (timestamp support inspired by contributions by Aiken Sam and Martin Brunecky). also introduced many other changes,
PdfPKCS7: Added the RIPEMD algorithm.
AcroFields: Some tools produce invisible signatures without an entry in the page annotation array.
SpecialSymbol: If PHI is ‘F’ the phi should be [...]