fidzu : nerd

An anonymous reader quotes a report from Ars Technica: A decade ago, AMD added a protection to its high-end CPUs to protect them against cold boot attacks and other types of physical exploits that siphon sensitive data out of the connected memory chips. Short for Transparent Secure Memory Encryption, TSME encrypts the entire contents stored in memory, making the data useless to physical attackers. Over time, AMD added TSME to lower-end processors, including the consumer version of its Ryzen chips, a CPU that costs less than the Pro version. Over the years, users of these lower-end chips have gotten used to the added security. Recently and without warning or notice, this lower-end line of AMD chips suddenly dropped the protection, and did so in a way that was impossible to detect on Windows machines and required a fair amount of technical work when using Linux. AMD has yet to say why TSME worked on these CPUs, or even to confirm the change. AMD declined to answer questions sent by email other than to say TSME "is a security feature only applied to PRO CPUs as part of AMD PRO Technologies." The statement is the first known time the chipmaker has explicitly made this restriction public. [...] There's no indication that AMD ever advertised or marketed TSME as being available in consumer CPUs. AMD has long said that a related memory protection, Secure Memory Encryption (SME), is available only in the Pro and Epyc CPU tiers. SME is OS-managed. It uses a single key and allows the OS to selectively encrypt individual memory pages. TSME is firmware-managed. It encrypts all RAM with no OS involvement. When active, it provides protection against physical attacks, including cold boot exploits, DRAM interface snooping, and memory module removal. It activates silently when enabled in the BIOS, making it the more practically useful of the two protections. Ben Kilpatrick, a self-described "privacy-conscious Linux hobbyist," discovered that TSME had stopped working on his consumer Ryzen processor despite remaining enabled in the BIOS. He spent months investigating, persuaded MSI engineers to test multiple CPUs, motherboards, and firmware versions, and filed a public AMD bug report that traced the change to newer AGESA firmware apparently disabling TSME on consumer chips while retaining it on Pro and EPYC models. "AMD engineers' comments, such as those mentioned above, and the years of TSME working just fine in the lower-cost tier processors, have understandably conditioned Kilpatrick and other users to reasonably regard it as an expected part of the chip package," reports Ars Technica. "AMD quietly removing it and providing no acknowledgment or explanation strikes these users as something of a betrayal." Joe Fitzgerald, an expert in silicon-level security, said in an interview: "They could have not realized they did it leading to their cagey responses, or they could have done it intentionally and tried to get away with it, leading to the same cagey responses. But I really feel like an explanation should be in order, even if it was 'TSME was never supposed to be supported. We did ship some firmwares that erroneously enabled it, but you shouldn't use them since we can't guarantee it'll work properly.'"

Read more of this story at Slashdot.

15 Jun 2026 8:02pm GMT

Debt sale set to test investor appetite for further exposure to AI sector amid a deluge of borrowing.

15 Jun 2026 7:07pm GMT

Longtime Slashdot reader necro81 writes: The heavily promoted, $499 T1 "Trump Phone" was originally said to be "Made in the USA" and ship in September 2025. Later, that was downgraded to "Assembled in the USA." Given the Trump Organization's lack of engineering or supply chain expertise, many assumed the "T1" would just be a private-label phone made by someone else. After a number of delays, the first phones are finally shipping. iFixit has performed a teardown and concluded that the T1 is a just gold-painted 2024 HTC U24 Pro -- a device from a Taiwanese company, probably using mainland China design and supply chains. In collaboration with NBC News, the iFixit team examined both phones using CT scans, side-by-side teardowns, and even reassembled a working T1 using a U24 Pro main board. As for "assembled in the USA," that may be true, in the same sense that your phone's repairman can "assemble" a phone from a handful of subassemblies sourced from someone else. Or it may have been assembled in Guangdong, China like the other U24 Pros. iFixit sums it up: "What you have is not an 'American-Proud Design,' but a phone designed in China, made in China, with the vast majority of parts sourced from China. I'm failing to find any stirring of American pride within me. I've certainly felt it before, so I can confirm that it is absent at this time." Quinn Nelson of Snazzy Labs on YouTube also published a comprehensive video of his experience ordering, unboxing, and tearing down the phone. "From pre-order emails landing in Gmail spam thanks to botched DMARC records, to paying for the $47.45 Trump Mobile 47 Plan over the phone, the entire buying experience was a disaster worthy of its own review," writes Nelson.

Read more of this story at Slashdot.

15 Jun 2026 7:00pm GMT

The rocket's breakup likely generated 100 to 150 new pieces of space junk.

15 Jun 2026 6:55pm GMT

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15 Jun 2026 6:37pm GMT

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15 Jun 2026 6:34pm GMT

Fox plans to take over Roku's streaming hardware, OS, and FAST services.

15 Jun 2026 6:29pm GMT

Longtime Slashdot reader schwit1 shares a report from NBC News: British Prime Minister Keir Starmer has announced a sweeping ban on social media use for those under 16, joining other countries around the world seeking to protect children online. "It's a big step for our country," Starmer said in a recorded video message released Monday. "Social media is making our children unhappy and unsafe, and as a parent, as much as a Prime Minister, I just can't let that go on anymore," he added. The ban will include social platforms like Snapchat, TikTok, YouTube, Instagram, Facebook and X, while there is no intention for messaging services like WhatsApp and Signal to be included, the government said in a release. [...] Starmer's government called Monday's announcement a "landmark" move, saying the new measures would be brought to Parliament before Christmas, with protections expected to come into force next spring. Beyond the blanket social media ban, the restrictions will also include blocks on functions such as livestreaming and stranger communication with children for under-16s, it added. "It's not an easy thing to do. I'll be honest about that," Starmer said. "We haven't rushed into it. We've looked carefully at the evidence, and we'll have to adapt our approach as technology changes, learn from other countries which are taking similar steps." He went on to say that it will face resistance from some of the most powerful companies in the world. "But we will take them on, and we will win, because the need for action could not be any clearer."

Read more of this story at Slashdot.

15 Jun 2026 6:00pm GMT

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15 Jun 2026 5:52pm GMT

Arch Linux's AUR is still operational, while new account registration appears blocked during ongoing cleanup work.

15 Jun 2026 4:36pm GMT

Firefox 152 is now available for download with experimental JPEG XL support, a redesigned Settings page, improved video controls, and more.

15 Jun 2026 2:19pm GMT

FreeRDP 3.27 arrives with stronger TLS defaults, five security advisories, Android client updates, and Azure/Entra improvements.

15 Jun 2026 2:00pm GMT