is session secure ?

[sinap]

hi every one
I'm new in spring-security
i can secure (authentication and authorization) with spring security
the question is if i put some important data except(username,pass,...)in session after authentication in program is it
secure ? or i should put this data in SecurityContextHolder? and how to set these information during program not in userDetails at start of program ?
and if secure how spring do it?

main question is "if I use my own session will Spring Security protect it?"
regard
sina

[sinap]

please answer my question I'm so confused

[sinap]

i found some answers in this link http://forum.springsource.org/showth...storing-values