<![CDATA[Can someone explain @filippo's post to me like I'm a 5-year-old?]]>Can someone explain @filippo's post to me like I'm a 5-year-old?

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Quantum Computers Are Not a Threat to 128-bit Symmetric Keys

There is no need to update symmetric key sizes as part of the post-quantum transition, due to the details of how Grover's algorithm scales. Most authorities agree.

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(words.filippo.io)

]]>https://board.circlewithadot.net/topic/9951a383-56c7-4592-9c10-018d24ab9ad5/can-someone-explain-@filippo-s-post-to-me-like-i-m-a-5-year-oldRSS for NodeFri, 15 May 2026 10:26:34 GMTMon, 20 Apr 2026 17:36:51 GMT60<![CDATA[Reply to Can someone explain @filippo's post to me like I'm a 5-year-old? on Mon, 20 Apr 2026 18:06:41 GMT]]>@scottley @dangoodin that is precisely the misconception the article is trying to rectify.

]]>https://board.circlewithadot.net/post/https://abyssdomain.expert/users/filippo/statuses/116438361797509314https://board.circlewithadot.net/post/https://abyssdomain.expert/users/filippo/statuses/116438361797509314Mon, 20 Apr 2026 18:06:41 GMT<![CDATA[Reply to Can someone explain @filippo's post to me like I'm a 5-year-old? on Mon, 20 Apr 2026 18:06:21 GMT]]>@dangoodin I have half an hour if you want to text me on Signal about it 🙂

]]>https://board.circlewithadot.net/post/https://abyssdomain.expert/users/filippo/statuses/116438360476059795https://board.circlewithadot.net/post/https://abyssdomain.expert/users/filippo/statuses/116438360476059795Mon, 20 Apr 2026 18:06:21 GMT<![CDATA[Reply to Can someone explain @filippo's post to me like I'm a 5-year-old? on Mon, 20 Apr 2026 17:43:45 GMT]]>@dangoodin @filippo the techniques to crack symmetric crypto are a logarithm reducing 128 bit to 64bits worth of attempts... 256 bit reduces to 128 bit.

For asymmetric, the reduction is far greater.

Slightly better details here:
https://m.youtube.com/watch?v=_MoRcYLN-7U&t=6s&pp=2AEGkAIB

]]>https://board.circlewithadot.net/post/https://infosec.exchange/users/scottley/statuses/116438271635944514https://board.circlewithadot.net/post/https://infosec.exchange/users/scottley/statuses/116438271635944514Mon, 20 Apr 2026 17:43:45 GMT<![CDATA[Reply to Can someone explain @filippo's post to me like I'm a 5-year-old? on Mon, 20 Apr 2026 17:41:27 GMT]]>@dangoodin @filippo cc: @sophieschmieg

]]>https://board.circlewithadot.net/post/https://chaos.social/users/tris/statuses/116438262560337446https://board.circlewithadot.net/post/https://chaos.social/users/tris/statuses/116438262560337446Mon, 20 Apr 2026 17:41:27 GMT