ktemkin

ktemkin, 2 months ago

this advice brought to you by my pack rat desire to try all of the various hw key technologies

ktemkin, 2 months ago

@jpm this is one of those client projects where it’s being made in such quantity that every layer I can strip off saves thousands per batch (and yet everything is differential and needs approximate impedance control up to some GHz)

there’s three of these CSPs in close proximity, the main manufacturer only has a 1:N:1 process (so no arbitrary blind and buried vias), and I would like the planes under them to not resemble swiss cheese =P

ktemkin, 2 months ago

@jpm [I managed to break everything out of a CS100, CS196 and CS 144 on only three signal layers, only blind vias on 1:2, and with no buried vias, thanks to FPGAs making it easy to swap things around]

now I just need to run an EM solver and see if I’m utterly fucked =P

ktemkin, 2 months ago (edited 2 months ago)

bonus: where do you store your backups? (feel free to skip if this bothers your opsec)

ktemkin, 2 months ago

personally, I have four keys and I keep them all just over there, completely unattended, just under that heavy wire basket propped up by a stick

ktemkin, 2 months ago

@irenes I currently get my spread like this:

1. in a bracelet I wear when not showering
2. purse that’s usually carried with me
3. fireproof safe at home
4. (admittedly slightly outdated) one sealed safe-deposit-style with a legal firm who can get it to me if I need it

ktemkin, 2 months ago

@irenes I used to do the stays-in-the-computer thing (I had a bunch of YK nanos for that), but I’ve decommissioned those as their key generation became dated (didn’t support EC algorithms)

I’m trying to go for NFC reader + the one I wear on my wrist as a replacement for convenience ones

ktemkin, 2 months ago

@irenes yeah; that’s a reasonable idea — though I can’t, as everyone I’d trust to do this with either lives with me or in the same building complex

ktemkin, 2 months ago

@sickmatter @tychotithonus 2+ includes 5 =P

ktemkin, 2 months ago

@svc so you /don’t/ want to come into this unmarked panel van?

ktemkin, 2 months ago

@blue_led that’s a neat idea! I use SSS for other things (especially for guarding credentials/KEKs for team things that have user privacy implications, so no one or two users can just decide to snoop), but haven’t thought of adding redundancy via outside distribution

ktemkin, 3 months ago

@gsuberland you need to put a note encouraging the user to cut their ground plane in half so the return currents don't overlap*

(*because they've been shot into the atmosphere)

ktemkin, 3 months ago

@rf correct

ktemkin, 3 months ago

(and yes, there are lockpicks in there, though they’re difficult to see)

ktemkin, 3 months ago

@rf its the old GPD Pocket 2 (the only one in a reasonable form factor for that; the pocket 3 is much bigger)

ktemkin, 3 months ago (edited 3 months ago)

if they'd only just called this "vCard field mappings" or something similar, then I'd have known to blame vCard >.>

(why the hell does vCard have a sex field? that... doesn't actually mean anything?)

ktemkin, 3 months ago

fuck, it’s on their feature list

ktemkin, 3 months ago

@passenger look idk about you but i’m sick and tired of blue decks that just run me entirely out of gender

ktemkin, 3 months ago

update: https://chaos.social/@ktemkin/112051503032729578