Loading .rbf file into EPCS16 for remote configuration of FPGA.

Hi all,
I am dealing with .rbf file, generated by Quartus II. I want to write the contents of rbf file into the EPCS flash using SPI interface. But the problem is that the .rbf file is encrypted and so I can't access the data though it. (Having rbf file loaded in flash, the FPGA can configure remotely). How can I see the contents of this encrypted .rbf file in binary or hex format?