Authentication with RFID

[roeido@yahoo.com]

Hi All,

I'm looking for a low cost RFID solution that will support
authentication.
There is no need for Write operation in the transponder or to encrypt
the data.

All the solutions I found so far are or to simple, only Read with no
uC, or to complex that support many more features which I don't need
and ,hence cost more.

Does someone have any idea for a solution for me.

Thanks in Advance
roy