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.

update : 17-08-2017
ORA-28028

ORA-28028 - could not authenticate remote server
ORA-28028 - could not authenticate remote server

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    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.