For those of us not in the loop, COSE[1] is CBOR Object Signing and Encryption, with CBOR being a binary JSON alternative. It is patterned off JOSE, the JSON standards which includes favorites like JWK.
Those lectures were the very best I had at uni. Because they were meant to be copied it allowed for two important effects: you process things very differently when writing with you hand, and just copying rather than transliteration from a slide say means you can focus on what is said and what's going on with the math.
For me this meant I recalled it way better. I hardly looked at the notes afterwards, but writing them down were crucial. I also could follow the process and ask questions where I didn't understand a step. When I did review the notes, they were very well structured and thus very informative.
The absolute worst lectures I had were slide-based. I either had to focus on transliteration to notes, but that meant I had to focus on that rather than what the professor was saying. And if I did the opposite I didn't write notes and thus could hardly recall the details if at all.
Keep in mind at least 2A of that is to power the four USB ports at their rated 500mA. So if you don't have four USB devices loading the USB ports at their max, you should be fine with 3A.
So private didn't mean you had to know the secret handshake. Forgejo did a hard-fork[1] in 2024 and this bug is four years old so probably also affected.
[1]: https://www.rfc-editor.org/info/rfc9052/
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