Debunking possible threats with public keys

[Somegory]

This could be a stupid question to be honest but I still want to know, because some security issues in this Blockchain space might not be fully available to thee public using internet search so please I need some tolerance here.

Since you have been in this crypto space have you in anyway come across an hack or brach that became successful with a bitcoin wallet using someone's public keys?

Or have you read something anywhere that says it's not safe to reveal your public keys online?
In general, are there possible threats with exposed Bitcoin public keys?

[Charles-Tim]

Since you have been in this crypto space have you in anyway come across an hack or brach that became successful with a bitcoin wallet using someone's public keys?

No.

No such thing as of now.

Or have you read something anywhere that says it's not safe to reveal your public keys online?
In general, are there possible threats with exposed Bitcoin public keys?

The possible threats against public keys are quantum computers, but the QC that can derive private keys from their public keys are not yet existing.

If you make bitcoin transaction, the public key of the private key you used to sign the transaction will be exposed to the public.

[ABCbits]

Or have you read something anywhere that says it's not safe to reveal your public keys online?

No. But if such article exist, i would assume it's created for FUD purpose because public key of Bitcoin address revealed when you spend your Bitcoin or sign message and share it online.

In general, are there possible threats with exposed Bitcoin public keys?

Excluding quantum computer, AFAIK there's no such threat whether in general or in theory, assuming the attacker only know public key of address.

[hmbdofficial]

This could be a stupid question to be honest but I still want to know, because some security issues in this Blockchain space might not be fully available to thee public using internet search so please I need some tolerance here.

Since you have been in this crypto space have you in anyway come across an hack or brach that became successful with a bitcoin wallet using someone's public keys?

Or have you read something anywhere that says it's not safe to reveal your public keys online?
In general, are there possible threats with exposed Bitcoin public keys?

this is actually funny you know, you will never hear any of such complains because the public key are just as good as our name or identity  on the network, the funds are not locked on them therefore exposing them have no any significant effect, did you realize that the address are the hash of the public key? if exposure of public key can be a problem then exposing your address is also a problem but its not. the only concern was if public key will be work back to get the private key since the public key was actually derived from the private key using the elliptical multiplication. but even the quantum computers that have the possibilities have not successfully done that  yet, its just speculations.  

[OcTradism]

This could be a stupid question to be honest but I still want to know, because some security issues in this Blockchain space might not be fully available to thee public using internet search so please I need some tolerance here.

Since you have been in this crypto space have you in anyway come across an hack or brach that became successful with a bitcoin wallet using someone's public keys?

Or have you read something anywhere that says it's not safe to reveal your public keys online?
In general, are there possible threats with exposed Bitcoin public keys?

Bitcoin private key > Bitcoin public key > Bitcoin address.

These processes are one-way from private key > public key, and from public key > public address. You can not get the private key from the public key or public address, while to send bitcoins, private key must be accessible for signing a Bitcoin transaction.

https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch04_keys.adoc

[promise444c5]

Since you have been in this crypto space have you in anyway come across an hack or breach that became successful with on  a bitcoin wallet using someone's public keys?

Or have you read something anywhere that says it's not safe to reveal your public keys online?
In general, are there possible threats with exposed Bitcoin public keys?

Same answer .. Nope

The whole public key trend became popular once again because of Quantum computers trend. There’s passibility of future threat when your public key is exposed  but again it’s a future possibility and not a present threat/ issue..

Generally, before the whole QC thing, your BTC address has always been mapped to a public key. Reusing it to receive from a different source, before or after spending from it, is a threat to your privacy itself. Exposing the public key opens the door to another possible future threat.

But there’s nothing like what you just mentioned.. Article &Threads about that are just for future speculation and there’re couple of it on this board already including the Technical boards, just do your search you will find them.

[lionheart78]

Since you have been in this crypto space have you in anyway come across an hack or brach that became successful with a bitcoin wallet using someone's public keys?

No, I have not came across any news of hack through public keys. Most hacked I read is on exchanges, a malware injected to the system of the victim  where private keys and other important data were hijacked.

Or have you read something anywhere that says it's not safe to reveal your public keys online?

So far all are speculations or theoretical assumption.  Other than the theory about the threat that quantum computers can acquire private keys using Bitcoin public keys^[1], there is no other news about Bitcoin being hacked through public keys.

[dkbit98]

Since you have been in this crypto space have you in anyway come across an hack or brach that became successful with a bitcoin wallet using someone's public keys?

I see other members before posting it's only a theory but that is not true, it has been done already and proven by one developer who received Q-Day Prize for his work.
Things are going to get more serious because of AI improvements and we can expect to see this happening more in future.
https://www.thestreet.com/crypto/technology/researcher-uses-quantum-computer-to-crack-key-that-protects-bitcoin

It's best not to use taproot addresses and avoid address reuse, as protection from future attacks.

[Ambatman]

You can not get the private key from the public key or public address, while to send bitcoins, private key must be accessible for signing a Bitcoin transaction.

Actually it's mathematically possible to derive a private key from a public key
But computationally infeasible today on Scep256k1.
Hence why we haven't seen or heard about any cases of a breach as a result of
Using Pubkey to get private key.

are there possible threats with exposed Bitcoin public keys?

Address reuse tend to affect privacy and now with QC on the horizon poses future threat.

[EL MOHA]

Or have you read something anywhere that says it's not safe to reveal your public keys online?
In general, are there possible threats with exposed Bitcoin public keys?

The reality is you can’t even hide your public key. Once you send a bitcoin out from an address the public key is actually revealed. This is because you’re unlocking the script type and this reveals the public key, you can only conceal when this script type remain lock.

To understand it easily, nodes needs your public key to verify your transaction even if it’s not included along side the signature in the transaction it’s easily derived from the ECDSA signature provided. Public key can even be publicly seeing from the sending addresses on block explorer either in the witness for Segwit addresses or last characters of the ScriptSig of legacy addresses.

So there is no way to actually conceal a public key of an address that has spent coins from the public and that’s why in the face of quantum risk anticipation address not been reuse is the solution for that now

[ABCbits]

Since you have been in this crypto space have you in anyway come across an hack or brach that became successful with a bitcoin wallet using someone's public keys?

I see other members before posting it's only a theory but that is not true, it has been done already and proven by one developer who received Q-Day Prize for his work.
Things are going to get more serious because of AI improvements and we can expect to see this happening more in future.
https://www.thestreet.com/crypto/technology/researcher-uses-quantum-computer-to-crack-key-that-protects-bitcoin

I would start to worry if they crack keys with much higher bits.

Lelli successfully broke a 15-bit encryption key using publicly available quantum hardware.

Lelli’s achievement represents a 512-fold jump in difficulty compared to the previous record set just seven months ago in September 2025, when Steve Tippeconnic cracked a 6-bit key.

It's best not to use taproot addresses and avoid address reuse, as protection from future attacks.

Did i miss something? What actually exposed on Taproot address is "tweaked public key", which is different from public key. I don't think quantum computer can be used to get private key or actual public key only from "tweaked public key".

[suzanne5223]

This could be a stupid question to be honest but I still want to know, because some security issues in this Blockchain space might not be fully available to thee public using internet search so please I need some tolerance here.

Since you have been in this crypto space have you in anyway come across an hack or brach that became successful with a bitcoin wallet using someone's public keys?

With the current computing power, it is impossible since Bitcoin wallet uses Elliptic curve cryptography, and it could take billions of years for hacker to have access to your BTC wallet, that's if there's a chance it may happen.

Or have you read something anywhere that says it's not safe to reveal your public keys online?
In general, are there possible threats with exposed Bitcoin public keys?

Yes, exposed public keys can experience a dust attack, and there's a possible future threat for almost all exposed public keys when it's the era of quantum computers. However, a lot of research and preparation are currently working at the moment to provide a quantum resistant wallet.

[lionheart78]

Since you have been in this crypto space have you in anyway come across an hack or brach that became successful with a bitcoin wallet using someone's public keys?

I see other members before posting it's only a theory but that is not true, it has been done already and proven by one developer who received Q-Day Prize for his work.
Things are going to get more serious because of AI improvements and we can expect to see this happening more in future.
https://www.thestreet.com/crypto/technology/researcher-uses-quantum-computer-to-crack-key-that-protects-bitcoin

It is still in a theoretical stage or assumption stage since the one cracked was only a 15 bit key, while Bitcoin is operating a much higher 256-bit scale. We cannot compare or use this case to say cracking Bitcoin is done already.  I believe saying that "it is done" already is somehow an overstatement

Bitcoin security is still solid until it is cracked, all statements about Bitcoin can be hack/crack by QC are still a theoretical possibility until this theory happens and Bitcoin security is cracked. 

It's best not to use taproot addresses and avoid address reuse, as protection from future attacks.

Good advice, it is better to know how to start protecting our Bitcoins now than feel sorry when the threat happens.