You can tell the level by the naming convention.
your name looks something like this:
c1700-k9sy7-mz.122-11.t.bin
the K9 means above 64-bit encryption
a K8 means equal to or below 64-bit encryption.
to decipher your whole image, visit the following:
http://www.cisco.com/warp/public/620/5.shtml
Happy Routing,
~rlc
CCNP, CCDA, CNE
