Is encryption really uncrackable?

You can even now modify your blockchain, but your modifications will be basically pointless unless you own the significant part of the network. This is the 51% attack.

No, we just need a crypto designed for cracking other crypto with all its calculative power.

One crypto to rule em all

Yes, it's mathematically proven, unless P=NP

>be store of value
>ever-present threat that SHA2 could be cracked
>it happens
>price dumps to 0.01, a bunch of internet-accessible services get hacked
>centralized services adapt to new crypto within a week or less
>1 year later, a proposal is passed among miners still maintaining the network at a loss after heavy manipulation and 51% attacks to change the algorithm
>price begins to increase again
>will never reach the same adjusted height again because of what happened

Crypto cracks have always been theoretical some years in advance of practical breaks. MD5 took ten years, Sha1 took the same. To my knowledge there's been no zero days such as you describe

>be government
>spend billions on quantum circuits just for this purpose
>top secret

>Spend billions
>to steal treefiddy
>top secret
>reveal it by stealing
>you
>not hard of thinking

>mathematically proven
>can try literally all combinations in finite time
That's not how mathematical proofs work, but ok

>test it on private networks obviously
>obtain private keys and create a database for later asset seizure all in one Executive Order 6102 move
>start mining transactions magnitudes faster than current speed
>seize everyone's asset using very high fee transactions
>you get most of the fees and corner the asset even more
>bitcoin is dead

No. In the not too distant future cryptocurrency will have to be made quantum-secure. As current iterations can potentially be cracked quantum computing methods given the fact that quantum computing poses a significant threat to SHA256.

You're completely right, but the real threat is that a flaw in a popular implementation of an otherwise theoretically solid algorithm is found, which could ve leveraged to trick miners into signing bad transactions onto the chain.

Attacking the mathematical model of cryptography is very difficult. Attacking code is way easier because code is difficult to formally prove.

No.

See enigma, th Krauts could never imagine the fishnchip eaters defeated their encryption.

Noone knew until 70 years later.

If anyone knows elliptic curve and aha hacking, they aint tellin you.

Nothing is truly uncrackable, the issue is how much time and resources are the authorities willing to spend to cracking something to nail an individual or group.

In theory something that may take up to 5 trillion years to crack could be cracked on the first guess.

¯\_(ツ)_/¯

SHA-256, RIPEMD-160, AND Elliptical Curve encryption would need to be cracked in order for bitcoin to be compromised. Unless the entire field of cryptography is rendered useless overnight, this is such an unlikely scenario. If you store your coins in an address without any transactions, your ECC public key is never revealed to the network, so even if there is an ECC vulnerability bitcoin can still be stored safely in these addresses. If there is a SHA256, or RIPEMD vulnerability, your addresses are still very secure.

Even if you could reverse engineer the function for generating a bitcoin address (minus some details):
SHA256(SHA256(RIPEMD160(SHA256(ECC_PUBKEY))))

You would still only have the ECC public key. So if anyone can figure out a way to reverse engineer all of that, then god damn I'll suck their fucking dick.

I have a strange question about encryption.

Have you ever play the maze game where you start from the outside and need a pencil line from the start to the center of the maze?

Notice all of those mazes start from the outside in. Why? Because starting from the center is easier.

Is encryption like this?

that's why they're scared of quantum computing. You could just skip the reverse engineering completely and just quantum-luck into the solutiion

Finite but not polynomial time. It would take millions or billions of years

Then do it. You can rent quantum cloud computers now.

Not familiar with quantum-luck. Explain.

That's not entirely true. The Germans knew enigma wasn't fully secure, but they didn't think it could be decrypted quickly enough to be useful. They were somewhat right, a pure crack of enigma would have been far too computationally expensive for the time, but the security of the protocol was severely reduced by operational flaws like key reuse and key table leaks from spies. The Germans were just too sloppy with their cryptographic rigour.

> algo is uncrackable
> its implementation isnt

Just waiting on 2k qubits.

Why does it seem like everyone gets their knowledge of quantum physics from What the Bleep do we know or something? Quantum physics isn't just some magical thing that solves all randomness in the universe of something,

I think people just like talking in memes and buzz words. Remember how graphene is also supposed to change everything.

Its not magical, but cutting out 2/3 of the keyspace from the get-go is definitely something. A few exponential gains in qubit circuits and it will solve in a reasonable amount of time.