[iText-questions] security enabled pdf failed to open using pdfreader

[newoutlook]

I enabled security password for a pdf document. I tried open the doc using
iText Pdfreader. I get the following exception. Anybody come across this
issue?

Exception in thread "main" java.lang.UnsupportedClassVersionError:
(org/bouncycastle/asn1/DEREncodable) bad major version at offset=6
        at java.lang.ClassLoader.defineClassImpl(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:258)
        at 
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:151)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:589)
        at java.net.URLClassLoader.access$400(URLClassLoader.java:123)
        at java.net.URLClassLoader$ClassFinder.run(URLClassLoader.java:1034)
        at 
java.security.AccessController.doPrivileged(AccessController.java:279)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:491)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:631)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:328)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:597)
        at java.lang.J9VMInternals.verifyImpl(Native Method)
        at java.lang.J9VMInternals.verify(J9VMInternals.java:68)
        at java.lang.J9VMInternals.initialize(J9VMInternals.java:129)
        at com.lowagie.text.pdf.PdfEncryption.<init>(Unknown Source)
        at com.lowagie.text.pdf.PdfReader.readDecryptedDocObj(Unknown Source)
        at com.lowagie.text.pdf.PdfReader.readDocObjPartial(Unknown Source)
        at com.lowagie.text.pdf.PdfReader.readPdfPartial(Unknown Source)
        at com.lowagie.text.pdf.PdfReader.<init>(Unknown Source)
-- 
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