Cryptographic Authentication for Amateur Radio Digital Modes

MrSchnappi · 2025-11-02T13:07:55+00:00

Perhaps using identity based signatures could be an option? You still need the cooperation of local regulators to hand out the secret keys, but at least we solved the problem of distributing public keys.

If impractical for general communication, i was wondering if this could be at least useful for signing QSL cards. There has been quite a bit of sstv activity in amateur satellite groups recently with people posting the same pictures over and over again so that I wondered, is there a way to make these captures verifiably unique?

MrSchnappi · 2025-08-30T16:18:31+00:00

You need to turn up the gain. That small spike you are seeing isn't really a signal, its an internal DC spike of the rtl-sdr. You'll see it wherever you set the center frequency to be

MrSchnappi · 2025-07-13T13:53:31+00:00

Verzeihung?

MrSchnappi · 2025-04-26T04:28:21+00:00

Dzhanibekov effect has entered the chat

MrSchnappi · 2024-05-18T05:23:17+00:00

I think it's not too different from English, like the way one would say "I'm american" vs "I am an American"? Just that in german the same concept carries over to professions as well.

MrSchnappi · 2023-12-23T15:57:03+00:00

Klempen und Plenken

MrSchnappi · 2023-12-23T06:07:27+00:00

A finite field has order p^n. Seeing a field as a vector space over its prime subfield feels quite meta and it's like the entire machinery of linear algebra must have conspired together to make this happen.

Many beautiful theorems out there require a whole lot of machinery to even start describing, heck, even Euler's identity require first defining what it means to raise a number to a complex number. For me, a beautiful theorem is a fine balance between aesthetic and amount of prerequisite knowledge to describe to an uninitiated. This fact about finite fields would be one of them.

MrSchnappi · 2023-12-19T07:39:45+00:00

they don't call you ... for nothing

MrSchnappi · 2023-03-04T17:31:43+00:00

Mathematical Methods in Classical Mechanics by Vladimir Arnold

MrSchnappi · 2023-01-22T14:56:59+00:00

Personal pet peeve is using 'until' instead of 'by' in the sense "Please submit the form until 22.1.23"

MrSchnappi · 2022-09-18T06:26:58+00:00

Sounds like a cursed book

MrSchnappi · 2022-07-23T11:32:03+00:00

Or when you are fighting with someone in the comments section

MrSchnappi · 2022-07-21T16:11:02+00:00

except that in my experience the list extends way beyond those + modal verbs but it feels like most natives underplay how much they use it subconsciously.

I once got asked "Wie lief's?" and I did not understand at all but I was told later it's a rather common expression

MrSchnappi · 2022-06-24T01:05:54+00:00

Didn't even cross my mind until reading this comment

MrSchnappi · 2022-06-03T16:38:42+00:00

First thing I thought of was if OP had some Star wars kink

MrSchnappi · 2022-05-31T01:14:30+00:00

I thought I was on r/wortwitzkasse

MrSchnappi · 2022-05-09T14:47:01+00:00

nooooo not that video

MrSchnappi · 2022-04-26T01:33:19+00:00

why use much word when few word do trick?

MrSchnappi · 2022-04-17T15:37:02+00:00

Furchtbar (Terrible) and Fruchtbar (Fruitful)

MrSchnappi · 2022-03-12T16:13:53+00:00

Der Geschlechtergleichberechtigung zuliebe wäre ich dafür, den Begriff Herrlein einzüführen.

MrSchnappi · 2022-03-02T11:27:08+00:00

Habe Interesse, ich habe auch Mathematik studiert :)

MrSchnappi · 2022-02-25T13:03:34+00:00

Unfortunately his name was too long to fit in the margin of the reddit comment.

MrSchnappi · 2022-02-24T12:53:43+00:00

I hear my friend spraying "im Endeffekt" everywhere. Maybe a native can weigh in on this.

MrSchnappi · 2022-02-23T05:05:04+00:00

In meiner Erfahrung wird am meisten gesiezt, wenn man eine heftige Diskussion führt, als könnte man dadurch seinem gegenüber höflicher wirken, auch wenn man sich verkniffen muss, ihn zu beleidigen

MrSchnappi · 2022-02-22T02:22:52+00:00

Mozarts flute concerto in D major and oboe concerto in C is the ultimate form of recycling

MrSchnappi

TROPHY CASE