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@@ -33,6 +33,15 @@ The sources to PCRE can be independently obtained from
ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/
+The Rijndael encryption implementation used as the basis for AES
+encryption and decryption support comes from Philip J. Erdelsky's
+public domain implementation. The files libqpdf/rijndael.cc and
+libqpdf/qpdf/rijndael.h remain in the public domain. They were
+obtained from
+
+ http://www.efgh.com/software/rijndael.htm
+ http://www.efgh.com/software/rijndael.txt
+
Building on UNIX/Linux
======================