ErrataRob

@ErrataRob@infosec.exchange

Created BlackICE, Sidejacking, Masscan, and other infosec things.

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ErrataRob, to random

Them: "I don't really get Z"
Me: Well, yea, it's because you are trying to understand it outside the context of history.
Me: <Gives hour long history lesson>
Them: <eyes glaze over>

ErrataRob, to random

How do you understand the term "Zero-Trust"?

I wrote up a blogpost about how I understand it, where I try to provide a serious answer instead of just cynicism and sarcasm. I mean, the cynical/sarcastic/humorous answers are better, but at some point, we need a serious discussion, too.

https://cybersect.substack.com/p/a-serious-definition-of-the-unserious

ErrataRob, to random

Your regular reminder that I've written a textbook debunking the OSI Model. I appreciate your questions posted here, it'll take a few days to answer, though.

It's a long textbook that covers a tiny topic because all the experts on the subject are "wrong". To substantiate this claim, I have to undo 40 years of history of the Internet and go back to first principles.

https://docs.google.com/document/d/1iL0fYmMmariFoSvLd9U5nPVH1uFKC7bvVasUcYq78So/edit?usp=sharing

ErrataRob, to random

I wrote up a blogpost on USB C power cables, such as for us road warriors.
https://open.substack.com/pub/cybersect/p/whats-the-most-durable-usb-c-power

ErrataRob, to random

I'd just like to interject for a moment. What you're referring to as Linux is in fact the full operating system. The kernel is actually known as "New/Linus's Kernel", after Linus Torvalds, the guy who originally wrote it to replace Minix.

ErrataRob, to random

"100% vegetarian fed"

They fed the vegetarians to the turkey?
Or was it the vegetarians who were responsible for giving food to the turkey?

Language is hard.

ErrataRob, to random

ok kids, what are you using for running VMs on M1/M2/M3 macBooks? I want to know what the cool kids are using behind the school during lunch break.

Viss, to random
@Viss@mastodon.social avatar

pierogification

ErrataRob,

@lcamtuf @Viss Eastern Europeans stole them from Asians.

ErrataRob, to random

What font are you using for writing code? I like fonts that do things like convert != into ≠. I ask because I'm setting up a new laptop, which means re-installing all these little things I forgot about.

jerry, to random

To sum up my day: I sure hope I figure out what I’m doing soon. Lots of people counting on me.

ErrataRob,

@jerry One of these days I'm going to sit down and figure out what I want to do with my life.

ryanc, to random

Is there any way to tell GCC not to generate LEA instructions?

ErrataRob,

@ryanc I think one of Intel's processors didn't efficiently handle LEA, so if you can output code for that CPU, you'd get fewer.

But what don't like like LEA instructions? It's the best opcode in the x86 instruction set!!!

ErrataRob,

@ryanc My guess is is that if you optimize for "speed" it'll use fewer LEA, but if you optimize for code size, it'll use a lot more LEA. I'm shocked it's slower on Coffee Lake. The problem with LEA is that it's an "address generation" instruction so put into the "wrong" pipelines on some processors. I think with Coffee Lake, Intel fixed this, and made LEA perform at full speed. Apparently i was wrong. I need to go back and read Agner Fog's timing documents.

ErrataRob,

@ryanc Thanks for responding to my question "why no LEA?". I know it's horrible on social-media that people don't answer the question but challenge the premise :-).

ErrataRob,

@ryanc I looked up Coffee Lake timings. Yup, they stick LEA down just a single pipeline, whereas the math operations it replaces can go down like 4 pipelines. This This can sometimes cause a scheduling conflict, which is why you are seeing only an inconsistent number of clock cycles lost per iteration.

So LEA is technically faster, but because it's limited to only one port, a dense mix of LEA instructions will slow things down a bit.

ErrataRob, to random

Ok kids, I need to upgrade my laptop from a Macbook Air x86. Do I go with a new Macbook M3 14 inch? or Macbook Air M2 15 inch? I've decided that after 20 years of a 13 screen that I'm ready to go up a notch. I'm leaning toward the M2 Air because the screen is larger but it still ways less than the M3 Pro. I want a minimum of 24gigs of RAM and a 2TB, and they come out to roughly the same price.

ErrataRob, to random

This video by @JaysonEStreet is incredi-awesome.
https://www.youtube.com/watch?v=6i-84wqc_qU

davep, to random

My friend got mad at me for smelling his sister's underwear recently.

I'm not sure if it was because she was wearing them at the time or if it was because all of their family was there watching.

Either way it made the rest of the funeral really uncomfortable.

ErrataRob,

@davep We've all had something similar happen to us.

mattblaze, to random
@mattblaze@federate.social avatar

Got my updated COVID (Pfizer) + flu + RSV jabs about 28 hours ago.

Side effects have been noticeably more mild than my previous jabs, which generally left me useless for about 12-18 hours the next day. This time I just had a very mildly elevated temp (max 99.1 or so) and felt a little out of it. It's mostly passed by now.

I've heard reports from others that the new vaccine hit them pretty hard, but not me.

ErrataRob,

@mattblaze I'm still hoping to get the Bezos microchips instead of Gates microchips.

ErrataRob, to random

How often do you use WiFi on your phone, connecting to networks that aren't either your home or work? What sorts of networks do you connect to? Starbucks? GoGo Inflight? Madam O's Massage Parlor?

I ask, because that recent Apple privacy bugs only impacts you if you connect your iPhone to unencrypted WiFi networks.

ErrataRob, to random

I'm cleaning up my tabs (got probably 1000 total open, across 20 windows, each can easily 50 tabs open). One is GMail with a half-composed email from Aug 26. I'm so bad at this.

ErrataRob,

@lcamtuf We used to brag about our incredible server uptimes, now it's browser tab uptime.

We need a feature in Chrome that when we right click on a tab, it tells us how long it's been open.

lcamtuf, to random

deleted_by_author

    •
    ErrataRob,

    @lcamtuf Pfft, sounds like you've never progressed beyond grabbing a garbage file on a Gibson.

    ErrataRob, to random

    I oppose censorship and cancel-culture at infosec conferences. This will probably get me canceled.
    https://cybersect.substack.com/p/stop-with-the-cancel-culture-in-infosec

    ErrataRob,

    @chetwisniewski @Viss @hrbrmstr
    For me, it's the combination of social community and social interaction at conferences. Conferences like DEF CON have changed.

    ErrataRob,

    @nf3xn So what you are saying is that you reject the claim by the Associated Press that thre is anger, hurt, bitterness, and grievance on both sides? That Black Hat should pick one side?

    ErrataRob,

    @nf3xn I don't see what's wrong with their views. I'm assuming you don't like their views because you've picked a side.

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