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Cake day: June 12th, 2023

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  • The problem is that so many browsers leverage hardware acceleration and offer access to the GPUs. So yes, the browsers could fix the issue, but the underlying cause is the way GPUs handle data that the attack is leveraging. Fixing it would likely involve not using hardware acceleration.

    As these patterns are processed by the iGPU, their varying degrees of redundancy cause the lossless compression output to depend on the secret pixel. The data-dependent compression output directly translates to data-dependent DRAM traffic and data-dependent cache occupancy. Consequently, we show that, even under the most passive threat model—where an attacker can only observe coarse-grained redundancy information of a pattern using a coarse-grained timer in the browser and lacks the ability to adaptively select input—individual pixels can be leaked. Our proof-of-concept attack succeeds on a range of devices (including computers, phones) from a variety of hardware vendors with distinct GPU architectures (Intel, AMD, Apple, Nvidia). Surprisingly, our attack also succeeds on discrete GPUs, and we have preliminary results indicating the presence of software-transparent compression on those architectures as well.

    It sounds distantly similar to some of the canvas issues where the acceleration creates different artifacts which makes it possible to identify GPUs and fingerprint the browsers.


























  • Some highlights if you don’t want to click:

    Temperatures are forecast to be warmer than normal for all of the northern U.S., from northern California, Oregon and Washington to Pennsylvania, New York and into New England.

    NOAA says that temperatures will stay closer to the 30-year average for the South.

    For the precipitation (rain, snow, sleet, etc.), the northern states could see below-normal snowfall, especially in the northern Rockies and the Great Lakes.

    Across most of the South, wetter than normal conditions are expected, especially in the Southeast from Louisiana to Florida and into the Carolinas.

    For the Northeast, there is a chance that this will be a wetter than normal winter from Washington, D.C., to Philadelphia, to New York City and into southern New England.

    super important detail

    One other thing to note, this is all a probability forecast. The atmosphere is very fluid and dynamic, and forecasts could change.