I can not decrypt the data from the stream like:
56 0 obj << /Length 1242 /Filter /FlateDecode >> stream x]êΩnƒ Ñ{ûbÀKq¬æ\\âê¢..
i just used
import de.intarsys.pdf.filter.FlateFilter;
from jpod / source forge and it works well
FlateFilter filter = new FlateFilter(null); byte[] decoded = filter.decode(bytes, start, end - start);
the bytes are straight from the pdf file