Not necessarily a GWT question, but GWT certainly makes use of many
widgets that contain data perhaps downloaded over SSL from a secure
web site.  The data is obviously in the clear inside the web browser,
which is expected and fine.

But are there any security issues if someone frames your web site or
otherwise gets the same web browser page to load javascript from
another web site, can the other web site's javascript work through the
DOM or the JS global pool to find all the data?

Would it be bad practice for the GWT client to keep the userid and
password used to authenticate so it can send them in every subsequent
RPC, both to defeat session hijacking (rather than sending a server-
side token that closely mirrors the session id) and as a way to allow
the client to auto-login itself should the request come in when the
server has already terminated its session (either because it expired
or was restarted, etc.)?
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