ORA-28028: could not authenticate remote server
Cause : During the course of opening a privileged database link, the remote server was not securely identified using the network security service. Additional errors should follow.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Consult the network security service documentation on how to properly configure the remote server.
Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.