Use at your own risk.
Remember Username and Password in Obiee11g
Go to your BIPS config path, for example like below,D:\OBIEE11G\instances\instance1\config\OracleBIPresentationServicesComponent\coreapplication_obips1
and the search Security tab in your instanceconfig file and add
<AllowRememberPassword>true</AllowRememberPassword>
Then save it and restart bips servervices.
Include the elements and their ancestor elements as appropriate, as shown in the following example:
<Security>
<!--This Configuration setting is managed by Oracle Enterprise Manager Fusion Middleware Control-->
<ClientSessionExpireMinutes>210</ClientSessionExpireMinutes>
<AllowRememberPassword>true</AllowRememberPassword>
<CookieDomain>value</CookieDomain>
<CookiePath>/analytics</CookiePath>
<InIFrameRenderingMode>prohibit</InIFrameRenderingMode>
</Security>
Save your changes and close the file.
Restart Oracle Business Intelligence Presentation Services using OPMN
Login to your BI Home page ..then logout and login again. OBIEE will remember your Username and Password and go straight to your BI home page.
For More please refer to the Oracle documentation,
http://docs.oracle.com/cd/E23943_01/bi.1111/e10541/psconfigset.htm#BIESG1292