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A comment on X-rays reveal censored portions of Marie Antoinette’s letters to Swedish count. Parent comment

Re:X-rays reveal censored portions of Marie Antoinette’s let... by CGamesPlay on Sunday October 03, 2021 @10:22AM (#28737362)
That article doesn’t talk about GPU decryption at all, which is many multitudes faster, and also it’s only talking about finding a specific AES key. It may be possible to search for multiple keys in parallel in the future, which could cut this figure down by the corresponding amount (if the goal is just to find some keys, and not specific ones).
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Re:X-rays reveal censored portions of Marie Antoinette’s let... by bnegreve on Sunday October 03, 2021 @10:44AM (#28737562)
Yes, they can be a hundred times faster so now it's only 273,378,930,384,066,111,944,300,099,749,229,403,236,110,674,297,569,624,874,932 years.

More seriously, GPUs are faster because they are highly parallel, and parallelism can only give you a speedup that is linear with the number of processing units. So unless you're planning to build a GPU with trillions units, that won't help much.

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Re:X-rays reveal censored portions of Marie Antoinette’s let... by klyrs on Sunday October 03, 2021 @03:52PM (#28739985)
A farm of a billion GPUs, each with a thousand cores sounds quite feasible with today's tech and gets you to trillion-times speedup of brute force. So, feel free to divide by 10^12... still not tractable.
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Re:X-rays reveal censored portions of Marie Antoinette’s let... by gregmac on Sunday October 03, 2021 @06:18PM (#28740994)
Have you tried to buy a GPU lately?
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Re:X-rays reveal censored portions of Marie Antoinette’s let... by klyrs on Sunday October 03, 2021 @06:54PM (#28741244)
I was in the market for a single GPU about 6 months ago, it shipped in a week and didn't break the bank. Buying a billion GPUs is an entirely different question. I'd look into buying fab equipment and doing a custom architecture. Given the length of the computation we're talking about, even a decade of lead time wouldn't significant. But as I understand it, current lead times are still less than a year.
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