Hi,
Has anyone given any thought how to apply the rainbow table to FACCH channels ?
For FACCH the burst are stolen from TCH but not en entire burst, just
half a burst (so a L2 message is split over 8 half bursts).
We know where they are (thanks to stealing bits). But we only ever
have 57
you will not get anything out of the rainbow tables with less than
64bits of keystream, if you abstain from bad ideas like doing 2^N
lookups for each N bits missing.
what is the content of the other half-burst in a typical FACCH usage scenario?
if you can for example come up with significantly
Hi,
what is the content of the other half-burst in a typical FACCH usage scenario?
if you can for example come up with significantly less than 2^57 possible
contents of the missing half, it might be economical to guess.
Usually ... speech ...
OTOH at call establishement time there is no
