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Top News In ஸ்பெக்டர் புத்தகங்கள் Today - Breaking & Trending Today

New micro-op cache attacks break all Spectre defences

By
Juha Saarinen
on May 2, 2021 6:03AM
Billions of computers vulnerable.
Researchers at the universities of Virginia and California in the United States have devised new Spectre-style hardware attacks that make it possible to steal data when processors fetch commands from their micro-ops caches.
The new vulnerability affects billions of computers and other devices worldwide, and the researchers say it will be much harder to fix than the speculative execution flaws discovered over the last few years.
In their paper,
I see dead µops: leaking secrets via Intel/AMD micro-op caches [pdf], the researchers present three attacks that break defences against the earlier discovered Spectre hardware flaws in processors speculative execution mechanisms. ....

United States , Xida Ren , Ashish Venkat , Speculative Execution , ஒன்றுபட்டது மாநிலங்களில் ,

AMD Zen 3 processors vulnerable to Spectre-like exploits

AMD has published a document warning
that Zen 3-based processors may be targeted by side-channel attacks. As per its description, this vulnerability is similar to Spectre, which plagued Intel processors three years ago.
AMD Zen 3 core architecture features a new technology that improves performance by predicting the “relationship between loads and stores without waiting for the address calculation to complete”. This technology is called Predictive Store Forwarding (PSF).
Most of the time, the prediction is calculated correctly, but occasionally it may not be as accurate as it should. When a bad PSF speculation occurs, Zen 3-based processors can be targeted by side-channel attacks similar to Intel processors affected by Spectre. ....

Predictive Store Forwarding , Yzen 3 , ப்ரிடிக்டிவ் கடை பகிர்தல் ,

AMD admits that Zen 3 CPUs are vulnerable to a new Spectre-style attack

Again?
on April 4, 2021, 10:58
28 comments
In brief: AMD has confirmed that a microarchitecture optimization inside Zen 3 CPUs can be exploited in a similar fashion to the Spectre vulnerabilities that plagued Intel CPUs a few generations ago. Disabling the optimization is possible, but will carry a performance penalty that AMD doesn’t believe is worth it for all but the most critical deployments of the processors.
In a recently published whitepaper, titled Security Analysis of AMD Predictive Store Forwarding, AMD describes the nature of the vulnerability and discusses the associated complications. In simple terms, the implementation of Predictive Store Forwarding (PSF) reopens the lines of attack previously threatened by Spectre v1, v2, and v4, because of its speculative nature. ....

Predictive Store Forwarding , Store Forwarding , Amd Ryzen , Yzen 3 , ப்ரிடிக்டிவ் கடை பகிர்தல் , கடை பகிர்தல் , அன்ட் ரைசன் ,

Waihi-Coromandel Police Report for 16 March

Waihi-Coromandel Police Report for 16 March
17 Mar, 2021 07:00 PM
3 minutes to read
Bay of Plenty Times
Last week in the Coromandel area there were six people arrested for breach of bail and warrants to arrest. A search warrant was executed, a rock met a windscreen, light-fingered crooks were active and the spectre of family harm reared its ugly head again.
Monday 8 March
Police executed a search warrant at a Kensington Rd address in relation to the robbery of Waihi Super Liquor that occurred on February 26. A suspect was arrested and police are investigating further lines of inquiry to identify the second offender. ....

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The Coolest PC Game Packing From the 1990s

Photo: Jesse Kumin/Permission of Hock Wah Yeo
With GameStop’s stock exploding and shrinking on a weekly basis, it’s easy to forget that until recently, it was an open question whether the next-gen of gaming consoles were going to come with an optical drive at all. Physical games managed to avoid the grim reaper, for now, but little care is put into their packaging these days. A whole generation missed out on a time when you could walk into a Babbages and an encyclopedia-sized PC game box practically leapt into your hands.
During the video game industry’s adolescence, a visit to the shelves of the computer shop meant finding shareware games in ziplock bags beside boxes adorned in the state-of-the-art of graphic design of the time. But some designers went further and took the opportunity to turn those standard cardboard boxes into eye-catching sculptural objects. One of the unsung heroes of the PC box is the designer Hock Wah Yeo. ....

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