Topic: Can a bitcoin address can be recovered from public key??? (Read 2716 times)

Guys Thanks for your replies....it helped me a lot !!!!!

SO I AM LOCKING THIS TOPIC....

THANK YOU AGAIN!!!! 

Bitcoin address is Base58 encoded a hash of public key. So if you have a public key you can calculate bitcoin address ;-)
But you will not be able spend bitcoins - you will need a private key  

I see what you meant there made an error, but the info-graphic still is handy.
It took me a while there to get the question misread it your right the private key comes first the bitcoin address comes last not that the bitcoin address is deduced backwards to find the master public key then the private key.

Was thinking of a strange configuration where the master public key reveals a private key through a hash in a deterministic wallet exploit.
https://bitcoinmagazine.com/articles/deterministic-wallets-advantages-flaw-1385450276
https://en.bitcoin.it/wiki/BIP_0032

Posting the proper one:





In that case, I am confused (!) Following the Process it is Private -> Public -> Address
EDIT: Read it as no its the other way around nvm your fine.

How to create Bitcoin Address
https://en.bitcoin.it/wiki/Technical_background_of_version_1_Bitcoin_addresses

0 - Having a private ECDSA key

   18E14A7B6A307F426A94F8114701E7C8E774E7F9A47E2C2035DB29A206321725

1 - Take the corresponding public key generated with it (65 bytes, 1 byte 0x04, 32 bytes corresponding to X coordinate, 32 bytes corresponding to Y coordinate)

   0450863AD64A87AE8A2FE83C1AF1A8403CB53F53E486D8511DAD8A04887E5B23522CD470243453A 299FA9E77237716103ABC11A1DF38855ED6F2EE187E9C582BA6

2 - Perform SHA-256 hashing on the public key

   600FFE422B4E00731A59557A5CCA46CC183944191006324A447BDB2D98D4B408

3 - Perform RIPEMD-160 hashing on the result of SHA-256

   010966776006953D5567439E5E39F86A0D273BEE

4 - Add version byte in front of RIPEMD-160 hash (0x00 for Main Network)

   00010966776006953D5567439E5E39F86A0D273BEE

(note that below steps are the Base58Check encoding, which has multiple library options available implementing it)
5 - Perform SHA-256 hash on the extended RIPEMD-160 result

   445C7A8007A93D8733188288BB320A8FE2DEBD2AE1B47F0F50BC10BAE845C094

6 - Perform SHA-256 hash on the result of the previous SHA-256 hash

   D61967F63C7DD183914A4AE452C9F6AD5D462CE3D277798075B107615C1A8A30

7 - Take the first 4 bytes of the second SHA-256 hash. This is the address checksum

   D61967F6

8 - Add the 4 checksum bytes from stage 7 at the end of extended RIPEMD-160 hash from stage 4. This is the 25-byte binary Bitcoin Address.

   00010966776006953D5567439E5E39F86A0D273BEED61967F6

9 - Convert the result from a byte string into a base58 string using Base58Check encoding. This is the most commonly used Bitcoin Address format

   16UwLL9Risc3QfPqBUvKofHmBQ7wMtjvM

http://security.stackexchange.com/questions/54136/possible-to-derive-private-key-from-public-key-given-enough-computing-power

It explains how a TX is created and confirmed, it does not explain how addresses are created.


Your answer is wrong, same as 90% of others here that have no idea what they are talking about. The address is the hash the of public key. Of course anyone can hash the public key in the correct way and get the address. Thus the address can be "recovered" from the public key.

What you are possibly refering to is the private key. The chain goes one way like this:

private key -> public key -> address

not (!) the other way around

address -\> public key -\> private key

but thats not the question asked by OP.

It's in the picture did you read each part of the process ?
And the infographic shows the process it merited posting.

Op's question was
Can a bitcoin address can be recovered from public key... If not so how is it related to bitcoin address???

The answer is NO
However you can try  if your looking for an atom in the sun or run a defective client.
(you cannot compute the public key without the private key).  A problem is that if one private key is leaked the others can easily be computed, but there is no general way to avoid it. )

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Since that does not happen in most use cases the simple answer is NO

just hope that quantum computer would be revealed to the public first, otherwise they can break ecdsa easily, and determinate public key from address

for the op this can be useful https://en.bitcoin.it/wiki/Technical_background_of_version_1_Bitcoin_addresses


this is a public key, with a quantum computer you can easily determinate it form an address

and sha256 is impossible to crack for now, even satoshi said that there is a possibility in the future that something unknown could break it

like quantum computer could pose a serious threat, surely not something which i call impossible

Not unless quantum computers (even just a few) have taken off. Until then, no.

And even if quantum computers take off soon, there are mathematically proven ways to protect data even from them...but not the current form of BTC keys (or SSL, TLS, PGP, etc.). Still, that's a long way off by most estimates. And they would go after much, much bigger targets than a BTC wallet.

So, no.

As a couple people have mentioned, a poorly-chosen private key can be recovered. This includes some brain wallets and bugs in private key generation. Anybody claiming to be able to recover any private key is lying or he would have done so with any number of multi-million dollar addresses readily available in the blockchain.

Even a botnet would not be powerful enough to crack private keys.

Skipping the physics and doing back-of-the-envelope math ...

There are 2¹⁶⁰ addresses. Just to count up to 2¹⁵⁹ (half the possible keys) would consume at least 4.8x10²⁵ joules. The energy consumption of the entire world is 5.6x10¹⁰ joules.

TL;DR Using all the electricity generated by the entire world, it would take 10¹⁵ (1,000,000,000,000,000) years to just to count through half the possible keys.

Are you guys done bashing? You cannot recover an address from another Bitcoin address. The whole process need to go back to the privkey, hence the comment of me and other users.

"That" is what was asked "Can you recover address from address" in broken English and that is the proper answer.

Did you even look at the picture you posted? OP is talking about the public key.

As long as someone does not have a weak R value cough blockchain tinkering with code.
If I recall correctly there was an exploit that was patched similar to that in the area of address reuse
https://en.bitcoin.it/wiki/Address_reuse
https://bitcointalksearch.org/topic/reused-r-values-again-581411

Simple Answer: NO

Just lock the thread. You will only get more answers from people that do not even bother reading your question properly.


and I thought we have been over this.


Has nothing to do with bitcoin.


Private key -> pubkey -> address


That only works for HD wallets and

mnemonic -> master private key -> private key -> pubkey -> address


Thats service specific and has nothing to do with the inner workings of bitcoin.

Your question is misleading. Normally the public key is the address. And for full access, to spend the funds, you need the private key.

Now, you forgot about "vanity generator" which in theory can give you the private key of a bitcoin address you want (or at least based on a pattern).
But you will not live long enough for that to come out from vanity gen.

As somebody said, only Chuck Norris can help, since he already counted to infinite and back, twice

and talking about evil-kennevel guy, i think it was his own address and he made it seem like other account.

IF NOT I CHALLENGE HIM TO CRACK MY ADDY.

Guys the things are now messing up here...

i asked only the question that CAN A BITCOIN ADDRESS CAN BE RECOVERED FROM PUBLIC KEY??

and i got the answer - "NO"

reason:-https://www.comodo.com/resources/small-business/digital-certificates2.php

there is only two-three points that can recover your address:-
1) private key
2) mnemonic
3) email address and phone no. that was linked to the address(if you had made via blockchain)

Talking about chances:

Finding the same bitcoin address (with private key) = 1 in 2^160

Compare to: [BAD THINGS]
1. Being killed by a vending machine. (1 in 112 million)
2. Being killed in a terrorist attack on an airline. (1 in 25 million)
3. Dying from a bee, hornet or wasp sting. (1 in 6.1 million)
4. Dying from being left-handed and using a right-handed product incorrectly. (1 in 4.4 million)
5. Dying in a plane crash. (1 in 1 million)
6. Being killed by flesh-eating bacteria. (1 in 1 million)
7. Getting Struck by Lightning. (1 in 1 million)
8. Drowning (1 in 2,000,000)
9. Drowning specifically in a bathtub. (1 in 840,000)
10. Dying in an on-the-job accident. (1 in 48,000)
11. Being murdered…just in general. (1 in 18,000)

Compare to: [GOOD THINGS]
1. Having identical quadruplets. (1 in 15 million)
2. Becoming US president. (1 in 10 million)
3. Becoming a Movie Star. (1 in 1,505,000)
4. Becoming an astronaut. (1 in 12,100,000)
5. Getting a royal flush in a first hand of poker. (1 in 649,740)
6. Winning an Olympic gold medal. (1 in 662,000)
7. Becoming a pro athlete. (1 in 22,000)
8. Winning an academy award. (1 in 11,500)
8. Finding out your child is a genius. (1 to 250)
9. Dating a millionaire. (1 to 215)

HOWEVER, the chance of finding the same bitcoin address (with private key) is still higher than the chance that YOU exist:



So, there is still a chance!!!

Only Chuck Norris can, and I tell you, he just need to blink once to find the private key!
But returning on the natural world: Only if you can win 3 max prize lotteries in a row you can find it.

Only he can.

Nope, brainwallet is known not only for their possible lapse in human mind but also the insecure algorithm used to generate them. There was recently a hacking tool that was revealed and it could potentially cause people to lose money.