Month: March 2024

Enlarge / United Launch Alliance's final Delta IV Heavy rocket, seen here in December when ground crews rolled it to the launch pad at Cape Canaveral Space Force Station, Florida. (credit: United Launch Alliance)

This is the rocket that literally lights itself on fire before it heads to space. It's the world's largest rocket entirely fueled by liquid hydrogen, a propellant that is vexing to handle but rewarding in its efficiency.

The Delta IV Heavy was America's most powerful launch vehicle for nearly a decade and has been a cornerstone for the US military's space program for more than 20 years. It is also the world's most expensive commercially produced rocket, a fact driven not just by its outsized capability but also its complexity.

Now, United Launch Alliance's last Delta IV Heavy rocket is set to lift off Thursday from Cape Canaveral Space Force Station, Florida, with a classified payload for the National Reconnaissance Office, the US government's spy satellite agency.

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Thousands of servers storing AI workloads and network credentials have been hacked in an ongoing attack campaign targeting a reported vulnerability in Ray, a computing framework used by OpenAI, Uber, and Amazon.

The attacks, which have been active for at least seven months, have led to the tampering of AI models. They have also resulted in the compromise of network credentials, allowing access to internal networks and databases and tokens for accessing accounts on platforms including OpenAI, Hugging Face, Stripe, and Azure. Besides corrupting models and stealing credentials, attackers behind the campaign have installed cryptocurrency miners on compromised infrastructure, which typically provides massive amounts of computing power. Attackers have also installed reverse shells, which are text-based interfaces for remotely controlling servers.

Hitting the jackpot

“When attackers get their hands on a Ray production cluster, it is a jackpot,” researchers from Oligo, the security firm that spotted the attacks, wrote in a post. “Valuable company data plus remote code execution makes it easy to monetize attacks—all while remaining in the shadows, totally undetected (and, with static security tools, undetectable).”

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There's a strong consensus that tackling most useful problems with a quantum computer will require that the computer be capable of error correction. There is absolutely no consensus, however, about what technology will allow us to get there. A large number of companies, including major players like Microsoft, Intel, Amazon, and IBM, have all committed to different technologies to get there, while a collection of startups are exploring an even wider range of potential solutions.

We probably won't have a clearer picture of what's likely to work for a few years. But there's going to be lots of interesting research and development work between now and then, some of which may ultimately represent key milestones in the development of quantum computing. To give you a sense of that work, we're going to look at three papers that were published within the last couple of weeks, each of which tackles a different aspect of quantum computing technology.

Hot stuff

Error correction will require connecting multiple hardware qubits to act as a single unit termed a logical qubit. This spreads a single bit of quantum information across multiple hardware qubits, making it more robust. Additional qubits are used to monitor the behavior of the ones holding the data and perform corrections as needed. Some error correction schemes require over a hundred hardware qubits for each logical qubit, meaning we'd need tens of thousands of hardware qubits before we could do anything practical.

Enlarge / Oregon's repair bill prohibits companies from implementing software locks that prohibit aftermarket or used parts from being installed in their devices.

Oregon Governor Tina Kotek today signed the state's Right to Repair Act, which will push manufacturers to provide more repair options for their products than any other state so far.

The law, like those passed in New York, California, and Minnesota, will require many manufacturers to provide the same parts, tools, and documentation to individuals and repair shops that they provide to their own repair teams.

But Oregon's bill goes further, preventing companies from implementing schemes that require parts to be verified through encrypted software checks before they will function. Known as parts pairing or serialization, Oregon's bill, SB 1596, is the first in the nation to target that practice. Oregon State Senator Janeen Sollman (D) and Representative Courtney Neron (D) sponsored and pushed the bill in the state senate and legislature.

Female Aedes aegypti mosquito as she was in the process of obtaining a "blood meal." (credit: US Department of Health and Human Services)

Puerto Rico has declared a public health emergency amid an ongoing outbreak of dengue infections, a mosquito-spread viral infection that can cause fever, aches, rash, vomiting, and, in about 5 percent of cases, a severe disease marked by internal bleeding and shock.

The US territory has tallied 549 cases since the start of the year, representing a 140 percent increase compared with cases tallied at this point last year, according to the territory's health department. The Associated Press reported that more than 340 of the 549 cases have been hospitalized.

In 2023, the island nation of more than 3.2 million people had over 1,000 cases of dengue throughout the year.

Enlarge / A Starlink user terminal during winter. (credit: Getty Images | AntaresNS)

Starlink's mobile ambitions were dealt at least a temporary blow yesterday when the Federal Communications Commission dismissed SpaceX's application to use several spectrum bands for mobile service.

SpaceX is seeking approval to use up to 7,500 second-generation Starlink satellites with spectrum in the 1.6 GHz, 2 GHz, and 2.4 GHz bands. SpaceX could still end up getting what it wants but will have to go through new rulemaking processes in which the FCC will evaluate whether the spectrum bands can handle the system without affecting existing users.

The FCC Space Bureau's ruling dismissed the SpaceX application yesterday as "unacceptable for filing." The application was filed over a year ago.

Enlarge / A new image from the Event Horizon Telescope has revealed powerful magnetic fields spiraling from the edge of a supermassive black hole at the center of the Milky Way, Sagittarius A*. (credit: EHT Collaboration)

Physicists have been confident since the1980s that there is a supermassive black hole at the center of the Milky Way galaxy, similar to those thought to be at the center of most spiral and elliptical galaxies. It's since been dubbed Sagittarius A* (pronounced A-star), or SgrA* for short. The Event Horizon Telescope (EHT) captured the first image of SgrA* two years ago. Now the collaboration has revealed a new polarized image (above) showcasing the black hole's swirling magnetic fields. The technical details appear in two new papers published in The Astrophysical Journal Letters. The new image is strikingly similar to another EHT image of a larger supermassive black hole, M87*, so this might be something that all such black holes share.

The only way to "see" a black hole is to image the shadow created by light as it bends in response to the object's powerful gravitational field. As Ars Science Editor John Timmer reported in 2019, the EHT isn't a telescope in the traditional sense. Instead, it's a collection of telescopes scattered around the globe. The EHT is created by interferometry, which uses light in the microwave regime of the electromagnetic spectrum captured at different locations. These recorded images are combined and processed to build an image with a resolution similar to that of a telescope the size of the most distant locations. Interferometry has been used at facilities like ALMA (the Atacama Large Millimeter/submillimeter Array) in northern Chile, where telescopes can be spread across 16 km of desert.

In theory, there's no upper limit on the size of the array, but to determine which photons originated simultaneously at the source, you need very precise location and timing information on each of the sites. And you still have to gather sufficient photons to see anything at all. So atomic clocks were installed at many of the locations, and exact GPS measurements were built up over time. For the EHT, the large collecting area of ALMA—combined with choosing a wavelength in which supermassive black holes are very bright—ensured sufficient photons.

Enlarge (credit: NurPhoto / Contributor | NurPhoto)

Unsealed court documents have revealed more details about a secret Facebook project initially called "Ghostbusters," designed to sneakily access encrypted Snapchat usage data to give Facebook a leg up on its rival, just when Snapchat was experiencing rapid growth in 2016.

The documents were filed in a class-action lawsuit from consumers and advertisers, accusing Meta of anticompetitive behavior that blocks rivals from competing in the social media ads market.

"Whenever someone asks a question about Snapchat, the answer is usually that because their traffic is encrypted, we have no analytics about them," Facebook CEO Mark Zuckerberg (who has since rebranded his company as Meta) wrote in a 2016 email to Javier Olivan.