dhx

11 ms·

1.
by dhx 7d ago
See [1] for the theory. I couldn't find a model/calculator that would help visualise typical COP values for particular climatic conditions. However, you'll find in your travels that a COP of ~2-2.5 is typically achieved for a
2.
by dhx 12d ago
djb provided a link in his blog post to a long history of ECDSA side channel vulnerabilities in ECDSA implementations.[1] It's not that RSA implementations weren't prone to side channel vulnerabilities either[2], but more with EdD
3.
by dhx 19d ago
For the panel discussion "Why do you contribute to OSM?" one of the questions sought to be understood is "What stops or demotivates you to contribute (more) to OSM?".[1] My response would be the incorrect application amo
4.
by dhx 26d ago
Some relevant information: [1] Federal Vehicle Safety Standards (US) § 571.206 Standard No. 206; Door locks and door retention components. https://www.ecfr.gov/current/title-49/subtitle-B/chapter-V/p...
5.
by dhx 1mo ago
Most discussion in recent years about chip fabrication shortages, expansion, etc has focussed on leading nodes (<7nm) and AI/computer chips. But perhaps more quietly in the background, China has been rapidly building other semicondu
6.
by dhx 1mo ago
I've contributed a bit on the infrastructure side of things to OpenStreetMap--high voltage transmission lines, pipelines, etc. I also have contributed to alltheplaces.xyz which whilst mostly known for collating shop locations, also col
7.
by dhx 1mo ago
I found [1] which appears to offer state-of-the-art performance of ~1000s latency for a FHE GPT-2 transformer block, equating I think to 3.33h inter-token latency (0.00008 token/s) for GPT-2(small) which has 12 transformer blocks. This
8.
by dhx 1mo ago
To throw out some real and up-to-date numbers from [1] for FHE at "128-bit security level", to sort 8x 8-bit unsigned integers on the most ordinary of desktop PCs, wait 3 seconds for the result. Want to sort 32x 8-bit unsigned int
9.
by dhx 1mo ago
Distribution infrastructure capacity is a current and ongoing concern for summer peak loads (every house turning on air conditioners at once) even with the large government subsidies that have existed for residential solar panels, residenti
10.
by dhx 1mo ago
I take it from [1] (transcript of recent DeepSeek CEO discussion with investors) that DeepSeek would disagree on the immediate catastrophic impact to the likes of OpenAI or Anthropic. The reason is even though technology parity mostly exist
11.
by dhx 1mo ago
It would have to be reproduced on a CUDA stack because AFAIK Huawei don't sell the Ascend 950PR (for inference) to anyone, rather, they operate them as part of the Huawei Cloud and only allow select customers (such as DeepSeek) to rent
12.
by dhx 1mo ago
Now that people have played with the model for a bit, there is one reported real world win for DeepSeek v4 Pro 0813 that is perhaps quite consequential given the drama in the US about Mythos. In a benchmark, DeepSeek v4 Pro 0813 found 87.5%
13.
by dhx 1mo ago
Old DeepSeek Flash 0731 prices have been independently reproduced.[1] The issue is DeepSeek being inundated and not having capacity to serve the demand, hence the price increases to significantly dampen demand. Never mind international dema
14.
by dhx 1mo ago
Also of interest: DeepSeek V4-Pro-0813 (1.6T-A49B) benchmark scores have apparently just been announced on the DeepSeek WeChat channel and they're sitting about Fable 5 level.[1] [1] https://www.reddit.com/r/LocalL
15.
by dhx 1mo ago
They're going to rely on a fuel source which only has 9-17 years of domestic supply at current production rates and proven reserves?[1] And a fuel source with largest proven reserves in countries that are currently or can be foreseen t
16.
by dhx 1mo ago
For lumber, data at [1] indicates much volatility in North American lumber prices from January 2023 to February 2026. Trough-to-peak prices for 2023, 2024 and 2025 have been over 30% across a given year. The main difference for 2026 so far
17.
by dhx 2mo ago
There can be surprisingly few critical components and processes in a water and sewerage network due to gravity-fed designs (far more cost efficient), large buffers (water reservoirs, sewage sumps, etc) allowing intermittent operation of oth
18.
by dhx 2mo ago
OSM probably has the best data on golf courses because for many courses, people have mapped each 'golf=hole' as a way, and mapped other golf course features such as 'golf=bunker', 'golf=green', etc. OSM knows o
19.
by dhx 2mo ago
Update 2: Upon checking Sentinel-2 imagery for BAH55 from 2026-03-29 to 2026-04-13 (and all later imagery) there is also visible blast damage to the roof of BAH55, which would correspond in timing to media reports about damage caused about
20.
by dhx 2mo ago
Update: IRGC published satellite imagery a few hours ago showing an impact to BAH54, apparently impacted on 2026-07-24, alongside another undated image before the impact. From a quick comparison of both images with reliable satellite imager
21.
by dhx 2mo ago
To add: The request has not yet been published by GitHub to https://github.com/github/gov-takedowns/tree/master/India/20... Also not mentioned in the project's GitHub repository yet per https:
22.
by dhx 2mo ago
AWS's 3 data centres in me-south-1 are: BAH53 (Manama): https://www.openstreetmap.org/way/1492345589 An adjoining substation to BAH53 had one of it's two main buildings damaged/destroyed about 2026-0
23.
by dhx 2mo ago
See [1] for April 2024 Clickhouse Github activity analysis of the xz backdoor. I haven't seen anyone write up a proper analysis that includes consideration of: - GitHub activity (e.g. all API actions on GitHub side including replying t
24.
by dhx 2mo ago
Title is not correct. Microsoft didn't patch a lot of this, they're reporting patches for dependencies that other people patched and Microsoft are inheriting. For example, Mariner (now branded Azure Linux) is a Microsoft-supported
25.
by dhx 2mo ago
If demographics are a problem for chipmaking in China, then it's good to compare against key chipmaking countries. To compare, 2024 (UN) fertility rates (highest-lowest):[1] US: 1.62 Japan: 1.23 China: 1.02 ROC: 0.86
26.
by dhx 2mo ago
For some recent data, see the diagram "Semiconductor foundry capacity 8" & 12" - by foundry location (in %)" at [1] for a rough idea of kWpm (thousand 300mm equivalent wafer starts per month) for key countries/r
27.
by dhx 2mo ago
My key point you are avoiding with personal attacks is: If I see another computer offer TLS named group 0x0200 (MLKEM512) as introduced by draft-ietf-tls-mlkem, do I have any assurance that the other end I'm communicating with uses con
28.
by dhx 2mo ago
It looks like recent Tenda hardware/firmware is encrypted per below examples, making it harder to audit. binwalk US_AC10V6.0si_V16.03.62.09_multi_TDE01.bin DECIMAL HEXADECIMAL DESCRIPTION -------------------------------
29.
by dhx 2mo ago
From RFC8446 (TLSv1.3) sE.4: "In general, TLS does not have specific defenses against side-channel attacks (i.e., those which attack the communications via secondary channels such as timing), leaving those to the implementation of the
30.
by dhx 2mo ago
The draft considers FIPS 203 to be normative. Therefore FIPS 203 forms part of this draft. You can't implement this draft without first implementing FIPS 203. FIPS 203 doesn't care about side channel resistance, per my other comme

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