Bill

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Open on infosec.exchange

Bill

Amazon:

https://www.amazon.com/William-Sempf/e/B00DDON3UO

OWASP:

https://owasp.org/www-chapter-columbus/

Amateur Radio:

KE8PCT

Header:

Medeco Biaxial

Contact info

Website:

https://sempf.net

GitHub:

Personal info

About:

I break web applications.

Wall 29 posts

Bill

Well look who showed up for Christmas! #plushtodon!

Mastodon plush under the tree

Like yesterday at 16:44 | Open on infosec.exchange

Bill

I LOVE the ink example in this writeup! Totally using that forever.

https://www.quantamagazine.org/how-public-key-cryptography-really-works-20241115/

#encryption #mathmatics

Like 16 December at 5:02 | Open on infosec.exchange

Taggart :donor:

To understand how this works, it’s easier to think of the “keys” not as objects that fit into a lock, but as two complementary ingredients in an invisible ink. The first ingredient makes messages disappear, and the second makes them reappear. If a spy named Boris wants to send his counterpart Natasha a secret message, he writes a message and then uses the first ingredient to render it invisible on the page. (This is easy for him to do: Natasha has published an easy and well-known formula for disappearing ink.) When Natasha receives the paper in the mail, she applies the second ingredient that makes Boris’ message reappear.

Damn that is elegant.

To understand how this works, it’s easier to think of the “keys” not as objects that fit into a lock, but as two complementary ingredients in an invisible ink. The first ingredient makes messages disappear, and the second makes them reappear. If a spy named Boris wants to send his counterpart Natasha a secret message, he writes a message and then uses the first ingredient to render it invisible on the page. (This is easy for him to do: Natasha has published an easy and well-known formula...

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16 December at 5:06 | Open on infosec.exchange

🌱 Ligniform :donor:

@Sempf Finally something I can use to explain to people with out just saying 'It's maths'

16 December at 5:16 | Open on infosec.exchange

@Sempf this is so good. Good article too.

16 December at 5:39 | Open on mastodon.gamedev.place

Bill

Like 1 13 December at 20:34 | Open on infosec.exchange

Bill

Fierce jungle beast. #catsofmastodon

My dumbshit cat hiding in the brush.

Like 2 September at 18:11 | Open on infosec.exchange

Bill

My cat looks like a hobo. #caturday (observed) #catsofmastodon

Fern, our calico, asleep next to a drain pipe with a beer sitting nearby.

Like 25 August at 18:55 | Open on infosec.exchange

Bill

Rare picture of Sunrise casting the "Water is wet" spell. #catsofmastodon

Fern, the calico, and sunrise, the orange, by the water dish. Sunrise has one paw held over the water as Fern drinks.

Like 20 August at 11:56 | Open on infosec.exchange

Bill

"Just a touch of sun on the snoot and beans, please." --Fern, probably #catsofmastodon

Our calico, learning about astrophysics.

Like 18 August at 21:10 | Open on infosec.exchange

Bill

Her Majesty in repose. #catsofmastodon

My ridiculous calico flopped on the concrete

Like 6 August at 23:28 | Open on infosec.exchange

Bill

The red cherry tomatoes are coming in! #gardening and bonus #catsofmastodon

Blue bowl full of red cherry tomatoes with the cat snoozing in the background

Like 26 July at 14:39 | Open on infosec.exchange

Bill

Client machines this morning. The one on the left has been on that boot screen for hours. Bonus early #caturday #cloudstrike

Three different laptops on my desk from three different clients. All of them in failure mode when I came down this morning, two with BSOD, in a authentication boot loop.

Like 19 July at 12:40 | Open on infosec.exchange

@Sempf cat works fine, use CatOS, guys!

19 July at 15:03 | Open on m.ocsf.in

Bill

Art by Xiera Ounce, at CCAD. #catsofmastodon #art

A mostly white cat on the couch eating Cheetos from the bag.

Like 10 July at 15:56 | Open on infosec.exchange

Bill

POV atm. It's like my faithful hunter resting at my feet, after a long morning of hunting. Moles. #catsofmastodon

Fern, our calico, in repose watching the storm come in.

Like 10 July at 13:22 | Open on infosec.exchange

Bill

She screm #catsofmastodon

Our calico laying on the mulch, yawning.

Like 28 June at 15:01 | Open on infosec.exchange

Bill

Guard cat charges extra on #caturday

Fern awkwardly standing guard while sitting.

Like 9 June at 1:04 | Open on infosec.exchange

Bill

Who needs a cat picture? #catsofmastodon #sploot

Fern in the reverse sploot position.

Like 30 May at 16:25 | Open on infosec.exchange

Bill

Elegance. #catsofmastodon

Our calico, Fern, splayed out on the cement.

Like 1 May at 16:38 | Open on infosec.exchange

Bill

Polaris UTV OHSA administrator. #catsofmastodon #catsatwork

Fern checking the tire tread height.

Like 16 April at 17:07 | Open on infosec.exchange

Bill

Distinguished Member of The Dandelion Inspection Brigade. #caturday

Fern the calico sitting half on the mulch, half in the yard, inspecting dandelions.

Like 13 April at 18:09 | Open on infosec.exchange

Bill

Her majesty deigns to share a puddle with the peasants. #catsofmastodon

Fern, our calico, out in the rain drinking dirty puddle water, as one does.

Like 11 April at 11:59 | Open on infosec.exchange

Bill

Queen of all she surveys. 😺 👑

#catsofmastodon

Fern camped out under the 30 foot arbor vidae on our septic mound.

Like 29 March at 18:17 | Open on infosec.exchange

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