[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Encryption Chips
> Faking crypto chips for public algorithims is theoretically
>more difficult, because its simple to create a DES_verify routine to make
>sure your DES chip is working right.
a) chips do not need makeup
b) t'were me, I would just fix the chip so that instead of 2^56 (DES) keys
or whatever, the PRNG was "fixed" so that the total keyspace was only 2^32
for instance. Enough to be nearly impossible to check but small enough
for a brute force engine to zip through in seconds *if you knew the
algorithm*.
The nice thing about am implimentation in software is that the code can be
examined for just this sort of thing *on a randomly selected operating unit*.
- hard to do with a chip.
Warmly,
Padgett