Marius Van Der Wijden claims to have broken Iden3's implementation of the Poseidon Hash. It is quite well-known, and probably used, so it's quite interesting.

He claims the problem is with their bit padding.

Normally you add '1' and then zeroes (possibly none) to fill the block length. This ensures that there is always *some* padding.

They didn't add the '1', so some input doesn't get padded at all, which leads to a collision.

#cryptography #snarks #zk #blockchain.

https://x.com/vdWijden/status/1877046148386451732

I published "Duopsism" during the holiday season, when no one was here. Here is it again.

Duopsism: A person is sitting in a dark room. There's nothing there besides a programmable black box.

What can the person deduct about himself? the world?

A whimsical thought experiment in the spirit of Descartes and Mary's Room.

https://neimanslab.org/2024-12-30/Duopsism.html

Tel Aviv's cultural center, which includes the city library, art museum, opera, and theatre, is a sight for the sore eye in a collapsing country.

It's 13:00 pm, Tuesday. The place is packed with political and cultural activity, talk groups (about the situation) and what looks like an improvised demonstration.

If there's hope for the country's future, its kernel lies here.

Just published - Duopsism - a person and his computer 🎉

A person is sitting in a dark room. There's nothing there besides a programmable black box.

What can the person deduct about himself? the world?

A whimsical thought experiment for the holiday season in the spirit of Descartes and Mary's Room.

https://neimanslab.org/2024-12-30/Duopsism.html

Woolball Testing App -- preview

It's a name system focusing on humans. There are separate name spaces for humans and artificial entities (AI, bots, organizations). Verification is done using ZK.

Still WIP.

Just because, for no good reason, I travelled to Pszczyna for the weekend. It's a town in Silesia, South-West #poland, 4 hours by train from Warsaw. A first class ticket, the only one available, costs 20 euros.

I didn't hear of Pszczyna till yesterday, but it came up in a search of beautiful old yet not over touristic polish towns.

It has plenty of forests and taverns nearby. With local beer, food and music. Beats visiting crowded famous destinations why day in my book.

I know it's in the wrong social media, but wow, what an amazing project for uni.

https://x.com/p_stolf/status/1860032878261993773

Péter Szilágyi, the main developer of Geth, the most popular Ethereum client, is taking a sabbatical after almost 10 years of working.

Honestly, I would be emotionally burned after a month in his shoes.