Ah, esqueci a ref da documentação demonstrando a descontinuidade da feature de password no 11gR2, é no manual 11gR2 Database Net Services Administrator's Guide o trecho :
" Note: In Oracle Database 11g Release 2 (11.2), the password feature is being deprecated. This does not cause a loss of security because authentication is enforced through local operating system authentication. Refer to Oracle Database Net Services Reference for more information. " []s Chiappa
