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MIT 6.5630 Advanced Topics in Cryptography Wild cryptography fact: Fiat-Shamir has known theoretical breaks, there exist contrived protocols where it fails no matter what hash function you use. But after decades of use with SHA-256 etc, not a single practical exploit exists.

3,332,836 просмотров • 10 месяцев назад •via X (Twitter)

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10 agent evals for AI engineers: (explained with usage) 1) golden set → a fixed set of cases you never edit, run on every single change. → use as the baseline that tells you whether anything moved at all. 2) llm as judge → a second model scores the output against a written rubric. → use when the answer is open-ended and there is no string to match against. 3) rubric scoring → one number per dimension: correctness, tone, safety, cost. → use when a single score hides which part actually got worse. 4) trajectory eval → grade the path the agent took, not only the answer it landed on. → use when the right answer for the wrong reason is going to bite you later. 5) tool unit tests → test each tool on its own, with fixtures, no model in the loop. → use always. most agent bugs are tool bugs wearing a costume. 6) regression suite → replay past runs against the new prompt or model and diff the results. → use before every prompt change, because prompts have no type system. 7) a/b in prod → split live traffic between two versions and compare outcomes, not vibes. → use when offline scores stopped predicting what users actually do. 8) human review → sample a slice of runs and have a person grade them honestly. → use to calibrate your judge, because a judge nobody checks quietly drifts. 9) shadow run → the candidate runs on real traffic in parallel and its output is shown to nobody. → use before a risky rollout, when one bad answer would be expensive. 10) red team → deliberately attack it: jailbreaks, injection, exfil, tool abuse. → use before anyone external can reach it, not after. offline evals tell you it works. online evals tell you it still works. both sides matter, but not all ten do. run the two that would have caught your last outage. save this. then read the full breakdown on loop engineering below.

Hanako

150,998 просмотров • 1 месяц назад

More sophistry and revisionist history from Mike Green. He claims: "Money exists to cancel debt. That's all it does. That's what it says on your dollar bill. This is legal tender for settlement of debts both public and private. It continues to function in that manner. It never stopped functioning in that manner. That is what it does. That's what it's supposed to do. It's not meant to store value. It's not meant to retain its value. It doesn't say that on there. There's no statement on your dollar bill that says this is good for three cowhides, right? It says this is for the settlement of debts, public and private." -------------------- His statements would only be sensible to someone who thinks money has been fiat for all of time. However, his claims are ahistorical (a word Green likes to use himself). Paper money was introduced as a representation of a specific amount of precious metal. Dollar bills once stated exactly how much silver or gold they were redeemable for. When the Coinage Act of 1792 was passed (and all the way up to 1971), you would have been laughed out of the room if you stated that "all money does is cancel debt." In fact, even after 1971, you would have been laughed at for claiming this, because Nixon's suspension of gold convertibility was "temporary," of course. When money was a specific representation of gold and silver, it DID store value. Of course paper money never stated that it can be exchanged for three cowhides. But when dollars stated exactly how much precious metal they were redeemable for, citizens KNEW that the underlying precious metal stored value over time. This is why the fiat rug-pull happened over many decades rather than overnight (central banking --> gold seizure --> "temporary" removal of gold convertibility --> fiat money). The best defense of Mike Green's claims are that they apply to the nature of fiat money TODAY. But Green leaves out that, historically (while competing monetary theories did exist), people correctly treated gold/silver-backed money as a store of value. Money DID store value. Everyone knew this to be true, and wanted it to be true (except banks and governments).

John Haar

10,393 просмотров • 4 месяцев назад