Connecting to Oracle with encrypted pwd I am reading my userid , pwd from a file with 400 permissions to connect to the external oracle application.

Now my requirement is that i should not use the plain text pwd present in the file . I should use some encrypted pwd to connect. How i can do this ?
My guess is that you would want to use an Oracle wallet so that you don't need to embed the username and password in your application at all.  Depending on the architecture of your application, there may be other options as well-- if you're building a Java application that is deployed to an application server, for example, most application servers have a way to configure connection pools such that only the encrypted password is stored in a configuration file.