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Rairii

hey look, an actually useful orange-site comment, about HP ink cartridge hardware hacking

"Put a resistor, about 1kohm, in the power line to the security chip on the cartridge.

Now, whenever the printer tries to read data from the chip, it works. Whenever it tries to record data to the chip (for example, marking the cartridge as empty), that uses more power, and the memory chip doesn't respond.

Amazingly, the whole setup just works and prints forever, saying the cartridges are always full... "

news.ycombinator.com/item?id=3

28 May 2023 at 14:52 | Open on haqueers.com
7 comments
CauseOfBSOD :fediverse:

@Rairii@haqueers.com HP hates this one weird trick!

(thank you though, gonna bookmark this in case I ever encounter a HP printer)

28 May 2023 at 14:53 | Open on fedi.bangsparks.com
Jernej Simončič �

@Rairii Even better: avoid buying HP printers.

28 May 2023 at 15:10 | Open on infosec.exchange
Rairii

@jernej__s at least, modern ones, and also inkjets.

if i bought a modern hp inkjet it'd purely be for hardware reversing.

28 May 2023 at 15:16 | Open on haqueers.com
eri :vlpn_smol:

@Rairii That is likely the best solution for those who are encumbered with such a printer.

For those who are looking to buy a new printer, I personally enjoy Canon’s line up of ink tank printers. I’ve been using one for like, a year or two now on the ink that came in the box.

The USB interface on the printers works great on both Mac and Linux, I personally have mine plugged into a Mac that shares it to the network, but you can do the same with Linux as well.

A note on the ink tank printers is that they use up the absorber sponges faster than normal printers (due to having to flush the lines out sometimes). This part is usually non-replacable on printers, but Canon allows you to replace it for 10-20 bucks as a “maintenance cartridge” on some models. Make sure you’re buying one that takes one of those, especially if you don’t print constantly. It doesn’t need replacing often, but it’s nice to be able to do it.

Out of the models that are currently available, the G1220, G2260, and G3260 are the ones you’d want to get, depending on the features you need.

@Rairii That is likely the best solution for those who are encumbered with such a printer.

For those who are looking to buy a new printer, I personally enjoy Canon’s line up of ink tank printers. I’ve been using one for like, a year or two now on the ink that came in the box.

The USB interface on the printers works great on both Mac and Linux, I personally have mine plugged into a Mac that shares it to the network, but you can do the same with Linux as well.

28 May 2023 at 15:31 | Open on moth.zone
glasspshr

@Rairii oh that’s delicious. Too bad I turned my back on hp a long time ago

28 May 2023 at 15:58 | Open on wonkodon.com
Rairii

@glasspusher modern hp printers are only good for hardware reversing

28 May 2023 at 16:05 | Open on haqueers.com
(((Jann Gobble)))🏳️‍🌈

@Rairii Great! Now, how many of us can do this? 😉

28 May 2023 at 18:13 | Open on twit.social
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