Welcome to CuVoodoo,
the sorcery of copper.
with a clever mechanism inside to bring the toner forward
*controls
*to the outside world
*electrostatic charges
*transformers
and the required heat
TSOC-6 actually
expect if you measure the weight, but that's tricky for so light toner
*crocodile clips
in theory 2^56 slaves, but the capacitance of the line will cause problems before
in I²C multi-master is defined
*to charge
*parasitic power
*a 1
and must be shorter than the reset pulse
*at least 1 byte
except for broadcast write commands
I meant just by measuring the voltage on the line you can't tell who is responsible for it
the other way around
*DS28E05
*least significant byte first, for multi-byte data
*byte
*are
a unique family code accross manufacturers
*bore
*bad
toner cartridges are expensive. toner a such isn't
it is there to bind you to a cartridge manufacturer
*1 kilo-bit (not bytes)
SHA-1 is a public algorithm
who wants to sign an NDA for such a simple protocol???
*are
*the ROM-ID
20 bytes
*hash sum
it could be protected and still read otherwise
*if the secret is write protected and EPROM mode has been activated
enable = switch on
*4 times
this re-try could give an attacker more time to do some computation
another attack would be to man-in-the-middle the communication to a full cartridge and discard the toner value update (i.e. write to memory), if the printer does check the value afterwards (and before printing)
part of the data is cut (on the right)
and page 0 is write protected
*low toner
*I don't see any difference
*secret
if you printer doesn't allow printing on low toner
or if like myself you are just interested to know how it works
*which is done when you buy a new cartridge
*anymore