How to Build a Supersonic Trebuchet

What do you get when you combine ancient designs with modern engineering? An exciting new way to convert time and money into heat and noise! I’m not sure whether to call this a catapult or a trebuchet, but it’s definitely the superior siege engine.

Have you ever sat down and thought “I wonder if a trebuchet could launch a projectile at supersonic speeds?” Neither have we. That’s what separates [David Eade] from the rest of us. He didn’t just ask the question, he answered it! And he documented the entire build in a YouTube video which you can see below the break.

Source: https://hackaday.com/2021/12/01/supersonic-projectile-exceeds-engineers-dreams-the-supersonic-trebuchet/

Documents Shows Just How Much The FBI Can Obtain From Encrypted Communication Services

There is no “going dark.” Consecutive FBI heads may insist there is, but a document created by their own agency contradicts their dire claims that end-to-end encryption lets the criminals and terrorists win.

Andy Kroll has the document and the details for Rolling Stone:

[I]n a previously unreported FBI document obtained by Rolling Stone, the bureau claims that it’s particularly easy to harvest data from Facebook’s WhatsApp and Apple’s iMessage services, as long as the FBI has a warrant or subpoena. Judging by this document, “the most popular encrypted messaging apps iMessage and WhatsApp are also the most permissive,” according to Mallory Knodel, the chief technology officer at the Center for Democracy and Technology.

The document [PDF] shows what can be obtained from which messaging service, with the FBI noting WhatsApp has plenty of information investigators can obtain, including almost real time collection of communications metadata.

WhatsApp will produce certain user metadata, though not actual message content, every 15 minutes in response to a pen register, the FBI says. The FBI guide explains that most messaging services do not or cannot do this and instead provide data with a lag and not in anything close to real time: “Return data provided by the companies listed below, with the exception of WhatsApp, are actually logs of latent data that are provided to law enforcement in a non-real-time manner and may impact investigations due to delivery delays.”

The FBI can obtain this info with a pen register order — the legal request used for years to obtain ongoing call data on targeted numbers, including numbers called and length of conversations. With a warrant, the FBI can get even more information. A surprising amount, actually. According to the document, WhatsApp turns over address book contacts for targeted users as well as other WhatsApp users who happen to have the targeted person in their address books.

Combine this form of contact chaining with a few pen register orders, and the FBI can basically eavesdrop on hundreds of conversations in near-real time. The caveat, of course, is that the FBI has no access to the content of the conversations. That remains locked up by WhatsApp’s encryption. Communications remain “warrant-proof,” to use a phrase bandied about by FBI directors. But is it really?

If investigators are able to access the contents of a phone (by seizing the phone or receiving permission from someone to view their end of conversations), encryption is no longer a problem. That’s one way to get past the going darkness. Then there’s stuff stored in the cloud, which can give law enforcement access to communications despite the presence of end-to-end encryption. Backups of messages might not be encrypted and — as the document points out — a warrant will put those in the hands of law enforcement.

If target is using an iPhone and iCloud backups enabled, iCloud returns may contain WhatsApp data, to include message content.

[…]

Source: Documents Shows Just How Much The FBI Can Obtain From Encrypted Communication Services | Techdirt

‘Wall of secrecy’ in Pfizer contracts as company accused of profiteering

Ministers have agreed a secrecy clause in any dispute with the drugs manufacturer Pfizer over Britain’s Covid vaccine supply. Large portions of the government’s contracts with the company over the supply of 189m vaccine doses have been redacted and any arbitration proceedings will be kept secret.

The revelation comes as Pfizer is accused by a former senior US health official of “war profiteering’’ during the pandemic. In a Channel 4 Dispatches investigation to be broadcast this week, Tom Frieden, who was director of the US Centers for Disease Control and Prevention under Barack Obama, said: “If you’re just focusing on maximising your profits and you’re a vaccine manufacturer … you are war profiteering.”

Zain Rizvi, research director at Public Citizen, a US consumer advocacy organisation which has examined Pfizer’s global vaccine contracts, said: “There is a wall of secrecy surrounding these contracts and it’s unacceptable, particularly in a public health crisis.”

Rizvi said the UK needed to explain why it had agreed to secret arbitration proceedings. He said: “It’s the only high-income country we have seen that has agreed to this provision. It allows pharmaceutical companies to bypass domestic legal processes.

“The UK government has allowed the drug firms to call the shots. How did we end up in a situation where a handful of drug firms were able to exert so much control over the most powerful governments in the world? It points to a broken system.”

Pfizer has won plaudits for its vaccine delivery programme, but the US multinational faces growing scrutiny over the scale of its profits and the proportion of doses it has delivered to low-income countries.

While AstraZeneca agreed to sell its vaccine at cost during the pandemic, Pfizer wanted to secure its profits. The Pfizer/BioNTech vaccine, which now has the brand name Comirnaty, will be one of the most lucrative drugs in pharmaceutical history.

The Channel 4 investigation reveals analysis by one biological engineering expert claiming the Pfizer vaccine costs just 76p to manufacture for each shot. It is reportedly being sold for £22 a dose to the UK government.

The estimated manufacturing costs do not include research, distribution and other costs, but Pfizer says its profit margin as a percentage before tax are in the “high-20s”. Pfizer expects to deliver 2.3bn vaccines this year with predicted revenues of $36bn (£26.3bn).

Vials for vaccine
One biological engineering expert claims the Pfizer vaccine costs just 76p to manufacture for each shot. Photograph: Rafiq Maqbool/AP

A report last month by the People’s Vaccine Alliance, a coalition of organisations including aid charities, said Pfizer and other drug firms have sold the majority of doses to rich countries, leaving low-income countries “out in the cold” . Only 2% of people in low-income countries had been fully vaccinated against coronavirus. Drug firms should suspend intellectual property rights for Covid-19 vaccines, tests, treatments and other medical tools.

Pfizer has faced increased scrutiny allegations of excessive global profits after its partner, the biotechnology company BioNTech, announced in September 2020 it was to receive up to €375m (£320m) from the German government to fund vaccine development.

Anna Marriott, Oxfam’s health policy manager said: “It is deplorable that billions of people around the world are being denied vaccines so that pharmaceutical companies can make obscene profits. Given that public investment was crucial to vaccine development, it’s incomprehensible that pharma monopolies are being prioritised over people’s lives.”

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Source: ‘Wall of secrecy’ in Pfizer contracts as company accused of profiteering | UK news | The Guardian

UK competition regulator orders Meta to sell Giphy

As rumored, the UK’s Competition and Markets Authority (CMA) has ordered Meta (Facebook) to sell Giphy, saying the deal “could harm social media users and UK advertisers.” It found that the deal would boost Meta’s already prodigious market power by limiting other platforms’ access to Giphy GIFs, “driving more traffic to Facebook owned sites — Facebook, WhatsApp and Instagram.”

The CMA said that Meta’s sites dominated social media user time to the tune of 73 percent and that it could further muscle out rivals like TikTok, Twitter and Snapchat by leveraging Giphy. It added that prior to the merger, Giphy launched “innovative advertising services” used by brands like Dunkin’ Donuts and Pepsi that it could have brought to the UK.

“Facebook terminated Giphy’s advertising services at the time of the merger, removing an important source of potential competition,” the regulator wrote. “The CMA considers this particularly concerning given that Facebook controls nearly half of the £7 billion display advertising market in the UK.”

[…]

Source: UK competition regulator orders Meta to sell Giphy | Engadget

Someone is hacking receipt printers with ‘antiwork’ messages

Hackers are attacking business receipt printers to insert pro-labor messages, according to a report from Vice and posts on Reddit. “Are you being underpaid?”, reads one message and “How can the McDonald’s in Denmark pay their staff $22 an hour and still manage to sell a Big Mac for less than in America?” another states.

Numerous similar images have been posted on Reddit, Twitter and elsewhere. The messages vary, but most point readers toward the r/antiwork subreddit that recently became popular during the COVID-19 pandemic, as workers starting demanding more rights.

Some users suggested that the messages were fake, but a cybersecurity firm that monitors the internet told Vice that they’re legit. “Someone is… blast[ing] raw TCP data directly to printer services across the internet,” GreyNoise founder Andrew Morris told Vice. “Basically to every single device that has port TCP 9100 open, and print[ing] a pre-written document that references /r/antiwork with some workers rights/counter capitalist messaging.”

The individual[s] behind the attack are using 25 separate servers, according to Morris, so blocking one IP won’t necessarily stop the attacks. “A technical person is broadcasting print requests for a document containing workers rights messaging to all printers that are misconfigured to be exposed to the internet, and we’ve confirmed that it is printing successfully in some number of places,” he said.

[…]

Source: Someone is hacking receipt printers with ‘antiwork’ messages | Engadget

Studying our solar system’s protective bubble

Astrophysicists believe the heliosphere protects the planets within our solar system from powerful radiation emanating from supernovas, the final explosions of dying stars throughout the universe. They believe the heliosphere extends far beyond our solar system, but despite the massive buffer against cosmic radiation that the heliosphere provides Earth’s life-forms, no one really knows the shape of the heliosphere—or, for that matter, the size of it.

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Opher’s team has constructed some of the most compelling computer simulations of the heliosphere, based on models built on observable data and theoretical astrophysics.

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a paper published by Opher and collaborators in Astrophysical Journal reveals that neutral hydrogen particles streaming from outside our solar system most likely play a crucial role in the way our heliosphere takes shape.

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models predict that the heliosphere, traveling in tandem with our sun and encompassing our solar system, doesn’t appear to be stable. Other models of the heliosphere developed by other astrophysicists tend to depict the heliosphere as having a comet-like shape, with a jet—or a “tail”—streaming behind in its wake. In contrast, Opher’s model suggests the heliosphere is shaped more like a croissant or even a donut.

The reason for that? Neutral hydrogen particles, so-called because they have equal amounts of positive and negative charge that net no charge at all.

“They come streaming through the solar system,” Opher says. Using a computational model like a recipe to test the effect of ‘neutrals’ on the shape of the heliosphere, she “took one ingredient out of the cake—the neutrals—and noticed that the jets coming from the sun, shaping the heliosphere, become super stable. When I put them back in, things start bending, the center axis starts wiggling, and that means that something inside the heliospheric jets is becoming very unstable.”

Instability like that would theoretically cause disturbance in the solar winds and jets emanating from our sun, causing the heliosphere to split its shape—into a croissant-like form. Although astrophysicists haven’t yet developed ways to observe the actual shape of the heliosphere, Opher’s model suggests the presence of neutrals slamming into our system would make it impossible for the heliosphere to flow uniformly like a shooting comet. And one thing is for sure—neutrals are definitely pelting their way through space.

[…]

Source: Studying our solar system’s protective bubble