this post was submitted on 18 Jan 2026
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The firm's senior financial strategist is concerned the advancements in the field of quantum computing will break Bitcoin.

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[–] evol@lemmy.today 42 points 1 month ago (3 children)

Crypto seems like alot lower on the list of problems that will happen if encryption no longer works

[–] pulsewidth@lemmy.world 6 points 1 month ago* (last edited 1 month ago) (2 children)

Businesses/orgs that have smart leaders are already implementing (or have already completed implementing) post-quantum encryption algs/methods into their systems to protect them for when quantum computers and quantum programming mature, making their existing encryption defeatable. For most systems it's just a matter of a software update and re-encrypting any data.

Eg: https://arstechnica.com/security/2025/10/why-signals-post-quantum-makeover-is-an-amazing-engineering-achievement/

This is a problem for public proof-of-work systems that cannot change their encryption, eg: all crypto. Bitcoin cannot change how their coins are encrypted without redesigning and completely rebuilding their public blockchain - it would require concensus from all major bitcoin users and businesses (coin exchanges etc), and could potentially leave any prior-minted bitcoin vulnerable anyway. It will not happen anytime soon - and when it does happen, it may be too late.

Hence, its actually pretty high on the list of quantum targets, and will likely be attacked as soon as it's available. Some people might be able to steal a bunch of Bitcoin and exchange it for other new (secure) coins or for cash, and get out before the Bitcoin public realize its been cracked. At which time the Bitcoin price will crash hard and may not recover (depending on what action they take to resolve the issue), so the cautious are getting out asap.

[–] evol@lemmy.today 6 points 1 month ago

Businesses/orgs that have smart leaders

So very few

But agreed its easy for centralized businesses/entities to eventually migrate their stuff into quantum secure systems. Theirs like a 100B for whoever can crack satoshi's bitcoin keys

[–] technocrit@lemmy.dbzer0.com 3 points 1 month ago* (last edited 1 month ago)

Businesses/orgs that have smart leaders are already implementing (or have already completed implementing) post-quantum encryption algs/methods into their systems to protect them for when quantum computers and quantum programming mature,

Is it actually smart though? Or are these people simply panicking about technology that may never exist?

And there's really no technical reason why crypto can't switch to quantum safe encryption. The better cryptos are already transitioning.

On the other hand I can easily imagine bitcoin being too dysfunctional to upgrade, but it's always been a shitcoin relative to more advanced cryptos.

[–] Gucci_Minh@hexbear.net 2 points 1 month ago (1 children)

Well not all encryption, mostly just public key based algorithms. AES-256 should be good for a while yet even in a post quantum computing world.

[–] evol@lemmy.today 4 points 1 month ago

forgot to specify asymmetric encryption good point

[–] LiveLM@lemmy.zip 1 points 1 month ago

Damn right. If encryption no longer works fucking crypto wouldn't even be in my top 500.