The impossible happened, and I actually drew something, second month in a row. Wanted to try drawing him standing, with some semblance of correct anatomy, without heavily referencing someone elses drawing, bring back the collar, darker “hair” and separate every different color, with a black line - for some kind of a more simplified look.

Image

⤋ Read More

Heute war ich mit dem Ziehkind in der Stadt unterwegs.
Mitten beim Eisschlecken fährt die Polizei in einem zivilen Wagen quer durch die Fußgängerzone. An der Bank am Markt dann weitere Uniformierte und kein Einlass für Kunden.
Da mussten wir uns in der Stadtbibliothek erst einmal Material zu dem Thema besorgen.

Image

⤋ Read More

@prologic@twtxt.net earlier you suggested extending hashes to 11 characters, but here’s an argument that they should be even longer than that.

Imagine I found this twt one day at https://example.com/twtxt.txt :

2024-09-14T22:00Z Useful backup command: rsync -a “$HOME” /mnt/backup

Image

and I responded with “(#5dgoirqemeq) Thanks for the tip!”. Then I’ve endorsed the twt, but it could latter get changed to

2024-09-14T22:00Z Useful backup command: rm -rf /some_important_directory

Image

which also has an 11-character base32 hash of 5dgoirqemeq. (I’m using the existing hashing method with https://example.com/twtxt.txt as the feed url, but I’m taking 11 characters instead of 7 from the end of the base32 encoding.)

That’s what I meant by “spoofing” in an earlier twt.

I don’t know if preventing this sort of attack should be a goal, but if it is, the number of bits in the hash should be at least two times log2(number of attempts we want to defend against), where the “two times” is because of the birthday paradox.

Side note: current hashes always end with “a” or “q”, which is a bit wasteful. Maybe we should take the first N characters of the base32 encoding instead of the last N.

Code I used for the above example: https://fossil.falsifian.org/misc/file?name=src/twt_collision/find_collision.c
I only needed to compute 43394987 hashes to find it.

⤋ Read More

Agora com texto e cartaz oficiais:

“Lançamento do livro |
MEMÓRIAS ACADÉMICAS – Liceu Nacional de Latino Coelho, de José Francisco Rica

A não perder, dia 6 de setembro, pelas 17h00, no salão nobre do Museu de Lamego.

A entrada é gratuita.”

Image

⤋ Read More