Hi! I'm having trouble to use WS-Security with X509 certificates. I've followed all the instructions of this blog (my code is pratically the same): http://www.jroller.com/gmazza/date/20080729 But when I invoke my service I am getting the following exception: org.apache.ws.security.WSSecurityException: An unsupported signature or encryption algorithm was used (unsupported key transport encryption algorithm: No such algorithm: http://www.w3.org/2001/04/xmlenc#rsa-1_5); nested exception is: | java.security.NoSuchAlgorithmException: Cannot find any provider supporting RSA/NONE/PKCS1PADDING | at org.apache.ws.security.util.WSSecurityUtil.getCipherInstance(WSSecurityUtil.java:690) I'm not very familiar with the security stuff, so please, if anybody could help it will be great! I'm using Sun JDK 1.5.0.15, JBoss AS 4.2.3 and jbossws-cxf-3.1.1.GA. Thanks in advance! View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4257138#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...