Crypto Security

AtomSMM

AtomSMM

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Crypto access relies on a 12-word phrase from a 2048-word set—seems secure. I know the odds of brute-forcing it are tiny, but still, I can’t help but wonder: what if quantum computers eventually crack it? Is there a guarantee our crypto stays safe, or is it a ticking time bomb? What do you think?
 
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Bruh, if quantum computers can crack seed phrases, we got bigger problems than just crypto
 
Couldn't they increase the word set from 2048 to 8192 if necessary? There are already wallets with 24-words seedphrase.

Anyway, new technologies would emerge to protect crypto assets
 
Usable quantum computers that can run Shor’s Algorithm at the scale needed to break ECC are not here yet.
Real estimates for this level of capability range from 10–30 years, and that’s assuming the tech progresses as hoped.
 
RichMedusa said:
Couldn't they increase the word set from 2048 to 8192 if necessary? There are already wallets with 24-words seedphrase.

Anyway, new technologies would emerge to protect crypto assets
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for quantum computers it will make no difference 2048 or 8192 or any other number, but there are different algorithms that are quantum calculations proof
 
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Quantum cracking is a valid concern, but by the time quantum computers are powerful enough, we'll probably have quantum-resistant algorithms in place. Are you backing up that phrase somewhere safe, though? That's a bigger risk right now.
 
AtomSMM said:
Crypto access relies on a 12-word phrase from a 2048-word set—seems secure. I know the odds of brute-forcing it are tiny, but still, I can’t help but wonder: what if quantum computers eventually crack it? Is there a guarantee our crypto stays safe, or is it a ticking time bomb? What do you think?
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Quantum computers will be able to crack bank accounts too, not just crypto wallets. So, what do you think will be the first to go?
 
Crypto world is really pliable, and there is no denial this is a worthy cause to worry about but when that time comes, we would cross the bridge.
 
Murakuting said:
Quantum computers have the unique ability to perform calculations exponentially faster than classical computers and could perhaps some day, break these encryption methods by using algorithms such as the Shor's algorithm.
So, "post-quantum cryptography" (PQC) algorithms are being developed by researchers and these are designed to be resistant to quantum attacks.
As time goes, most probably, organizations will then make a transition to these new cryptographic methods thereby ensuring the security of their systems.
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If quantum computers can break these encryption methods, the world banking sector will collapse.
 
If you’ve got enough computing power to be able to crack PKs you’d be better off putting that machine to work on mining BTC.
 
quantum cracking seed phrases? yeah, scary af in theory
 
Classical brute force is impossible today. Quantum risk is theoretical for now, but future proof wallet will adapt.
 
Defense will be the least of the problems in this case.
 
we just did a wallet hardening for a fund: the real risks were seed leaks and address reuse, not quantum. moved them to 24‑word+passphrase, hardware wallets + 2‑of‑3 multisig, rotated old utxos. our stance: monitor PQC, be ready to migrate, but don’t get phished today
 
A 12-word seed has 128-bit security. Classical brute force is impossible, and even with quantum computers, Grover’s algorithm only reduces it to ~2642^{64}264, still astronomically hard.


The real quantum risk for crypto is elliptic curve cryptography (Shor’s algorithm could break private keys once public keys are exposed). Seed phrases themselves aren’t the weak link.


By the time quantum computers are strong enough, major blockchains will likely have migrated to post-quantum cryptography.
 
Quantum computers won’t crack BIP-39 seed phrases anytime soon—but they could one day threaten exposed Bitcoin public-keys.
While 12/24-word phrases remain validly secure for now, future-proofing needs are real: the industry is already gearing up for post-quantum upgrades.
Not a ticking bomb, but it’s smart to stay alert and ready.
 
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