How to use Segwitaddress.ORG ?

[Stedsm]

Friends,
I've seen that being non-user of SegWit, there are no such benefits or advantages that we can accrue.
So, I wish to learn how to switch to SegWit completely?

I became aware of Segwitaddress.org to create an address directly from there, but if I use that address, will I be able to sign messages through that address (as the address is being provided with the private key itself)?

I also used an option that asks for a "WIF Private Key" (I entered my Legacy address, i.e.; 19RidcN96xgXkWi8gDwxcmbjjdjfrxpxvv's privkey) there and got an address that could be used to receive funds. But what I don't get here is, where will I see those funds and where can I use them from?
I mean, if I use the same privkey in any wallet, it will still show 19RidcN96xgXkWi8gDwxcmbjjdjfrxpxvv as my address and not the one I get from segwitaddress.org, what should be done here? As well, should I keep me Legacy address' privkey even if I adopt SegWit completely?

[Carlton Banks]

STOP

DO NOT enter your Bitcoin private keys to any type of website, ever.

There is no need to enter any private key. At best, this site is incompetently designed, at worst, a scam to steal your BTC

STOP

[Stedsm]

STOP

DO NOT enter your Bitcoin private keys to any type of website, ever.

There is no need to enter any private key. At best, this site is incompetently designed, at worst, a scam to steal your BTC

STOP

What if I already did it? Shall I take it as my current address 19RidcN96xgXkWi8gDwxcmbjjdjfrxpxvv's privkey has been compromised? Should I still use that address or change it to another one? As well, if that's not the site I should be using, please take me to something that's trustworthy and could get me a SegWit address. I use GreenAddress and GreenBits apps, they've currently given me with addresses starting with a '3'. Are these addresses just for one time use or can I use them normally just like I use my Legacy address? As I won't be holding private key of such address, is it safe to keep my funds there?

[Xynerise]

What if I already did it? Shall I take it as my current address 19RidcN96xgXkWi8gDwxcmbjjdjfrxpxvv's privkey has been compromised? Should I still use that address or change it to another one?

If you input your private key directly in the site without downloading the webpage and running it in tails then yes, consider that address compromised.

As well, if that's not the site I should be using, please take me to something that's trustworthy and could get me a SegWit address.

Electrum wallet can generate native segwit addresses (Bech32)
If you want for mobile then Samourai wallet can do that also.

 

I use GreenAddress and GreenBits apps, they've currently given me with addresses starting with a '3'.

Addresses that start with 3 are P2SH addresses, Segwit addresses are P2SH-P2WPKH addresses so they start with 3 also.
IIRC Green Address and Green Bits addresses are multisig Segwit addresses.

Are these addresses just for one time use or can I use them normally just like I use my Legacy address? As I won't be holding private key of such address, is it safe to keep my funds there?

You can use ANY bitcoin address as much times as you want as long as you hold the private key.
It is just not recommended because of privacy reasons and the hypothetical future when muh quantum computers will break bitcoin security.

[shulio]

I hope you have withdrown you BTC from your address (19RidcN96xgXkWi8gDwxcmbjjdjfrxpxvv). I checked the address and it has no BTC in it.

[TheQuin]

I hope you have withdrown you BTC from your address (19RidcN96xgXkWi8gDwxcmbjjdjfrxpxvv). I checked the address and it has no BTC in it.

It looks like the last tx out of that address was a couple of days ago to the same destination address as previously used, so I think Stedsm's funds are safe.
From searching around it looks like it is not a phishing site it's an open source paper wallet generator https://github.com/coinables/segwitaddress
But as Carlton Banks said NEVER enter a private key into a website and it would best to assume that key is now compromised.

[Stedsm]

What if I already did it? Shall I take it as my current address 19RidcN96xgXkWi8gDwxcmbjjdjfrxpxvv's privkey has been compromised? Should I still use that address or change it to another one?

If you input your private key directly in the site without downloading the webpage and running it in tails then yes, consider that address compromised.

As well, if that's not the site I should be using, please take me to something that's trustworthy and could get me a SegWit address.

Electrum wallet can generate native segwit addresses (Bech32)
If you want for mobile then Samourai wallet can do that also.

Samourai wallet? Can I use the same address to get paid more than once? Hope it's not the same as Blockchain.info's addresses, as they change once we use it.

I use GreenAddress and GreenBits apps, they've currently given me with addresses starting with a '3'.

Addresses that start with 3 are P2SH addresses, Segwit addresses are P2SH-P2WPKH addresses so they start with 3 also.
IIRC Green Address and Green Bits addresses are multisig Segwit addresses.

Can I use those addresses? Once again, why won't I be able to sign message through these addresses?

Are these addresses just for one time use or can I use them normally just like I use my Legacy address? As I won't be holding private key of such address, is it safe to keep my funds there?

You can use ANY bitcoin address as much times as you want as long as you hold the private key.
It is just not recommended because of privacy reasons and the hypothetical future when muh quantum computers will break bitcoin security.

I asked that question for SegWit addresses, not the one that's probably compromised, i.e.; 19RidcN96xgXkWi8gDwxcmbjjdjfrxpxvv

I hope you have withdrown you BTC from your address (19RidcN96xgXkWi8gDwxcmbjjdjfrxpxvv). I checked the address and it has no BTC in it.

It looks like the last tx out of that address was a couple of days ago to the same destination address as previously used, so I think Stedsm's funds are safe.
From searching around it looks like it is not a phishing site it's an open source paper wallet generator https://github.com/coinables/segwitaddress
But as Carlton Banks said NEVER enter a private key into a website and it would best to assume that key is now compromised.

Yes, that transaction was done by me only. And I checked the source, which is why I used my private key there when I was online. I believe I should not receive any coins over that address anymore but should keep it to sign messages. Can you answer my queries told in the same comment?

[cellard]

Are these addresses just for one time use or can I use them normally just like I use my Legacy address?

You can reuse segwit addresses an infinite amount of times, just like legacy addresses (im talking about in general, not about this specific website hich im not even going to click) , but please, do not put your private key on that website or on any website ever, ideally never export your private key, your wallet software should never show your private key. To move your founds from one wallet to another, then just send yourself the coins from one address to another.

[Stedsm]

Are these addresses just for one time use or can I use them normally just like I use my Legacy address?

You can reuse segwit addresses an infinite amount of times, just like legacy addresses, but please, do not put your private key on that website or on any website ever, ideally never export your private key, your wallet software should never show your private key. To move your founds from one wallet to another, then just send yourself the coins from one address to another.

Not so sure about the Electrum part as I'm still not getting it, but all I can see is that, addresses are getting changed back to back whenever I get out of some apps (GreenBits and GreenAddress) and get back in. If it will be like this, how will I be able to receive coins multiple times over a single address when there will be a change after each transaction? Why can't we see a private key instead, so that we might just put it in some compatible wallet and start using it?

[cellard]

Electrum wallet can generate native segwit addresses (Bech32)
If you want for mobile then Samourai wallet can do that also.

Not so sure about the Electrum part as I'm still not getting this, but all I can see is that, addresses are getting changed back to back whenever I get out of the app and get back in. If it will be like this, how will I be able to receive coins over a single address only? Why can't we see a private key instead, so that we might just put it in some compatible wallet and start using it?

With electrum you keep the same addresses. Once you start the software, it will ask you if you want a legacy wallet or a segwit address, and then you get a wallet file, and this file will give you access to your coins, much like Bitcoin Core's wallet.dat, and also you will get a seed which can generate the content of this file anywhere you are at without holding the file (so save it somewhere that nobody can see it or better memorize them and destroy it).

[Xynerise]

]

Samourai wallet? Can I use the same address to get paid more than once? Hope it's not the same as Blockchain.info's addresses, as they change once we use it.

You can always reuse addresses infinitely as long as you have the private key.
Wallets generate new addresses so people looking at the blockchain will not be able to track your transactions easily.
No matter how many addresses you use you'll always be able to control the funds if you used the same wallet to create the address.

Can I use those addresses? Once again, why won't I be able to sign message through these addresses?

Yes, you can use them.
You can't sign messages with Green Address or Greenbits because they are multisig addresses, meaning GreenAddress holds one set of private key while you have the other.

I asked that question for SegWit addresses, not the one that's probably compromised, i.e.; 19RidcN96xgXkWi8gDwxcmbjjdjfrxpxvv

You can reuse any address (segwit or legacy ) as much as you like as long as you have the private key.

Yes, that transaction was done by me only. And I checked the source, which is why I used my private key there when I was online. I believe I should not receive any coins over that address anymore but should keep it to sign messages. Can you answer my queries told in the same comment?

In bitcoin it's best to be paranoid about security so don't use that address anymore and consider it compromised.
If it's really compromised then whoever holds the private key can sign messages also.

[Anti-Cen]

STOP
DO NOT enter your Bitcoin private keys to any type of website, ever.
STOP

You can say that again because Segwit is not implemented for Bitcoin and has been dropped but
it is confusing because I hear about Segwit wallets and I am not talking about Segwit2x here that uses B2X

Segwit proposal would had lead to bigger block sizes but they tried to redefine how they count bytes
to hide this for some reason which i really don't like
See https://www.youtube.com/watch?v=DzBAG2Jp4bg

[achow101]

You can say that again because Segwit is not implemented for Bitcoin and has been dropped but
it is confusing because I hear about Segwit wallets and I am not talking about Segwit2x here that uses B2X

This is strictly untrue. Segwit as specified by BIPs 141, 143, and 144 is activated on Bitcoin. The original segwit2x proposal is not and is dead. Segwit is absolutely implemented for Bitcoin and was not dropped.

[Anti-Cen]

This is strictly untrue. Segwit as specified by BIPs 141, 143, and 144 is activated on Bitcoin. The original segwit2x proposal is not and is dead. Segwit is absolutely implemented for Bitcoin and was not dropped.

Thank you for making that clear and I stand corrected

Getting complicated since someone forked Segwit something and uses it for B2X

Not got a weeks to read and digest "BIPs 141, 143, and 144 " but do you have a Youtube link for this please
because the one I watched told a different story completely but is from 2016
https://www.youtube.com/watch?v=DzBAG2Jp4bg

Basically he says the block gets spread over blk.dat and a "Block Extension" file using Segwit but i would like
to get my facts right about this and understand why it's not just a case of changes on the nodes but also
code in the wallet.

Maybe better you answer this question here https://bitcointalk.org/index.php?topic=2679337.new#new
or open a new thread and PM me the link where we can go into detail because I am sure others would like to understand this too

[Stedsm]

With electrum you keep the same addresses. Once you start the software, it will ask you if you want a legacy wallet or a segwit address, and then you get a wallet file, and this file will give you access to your coins, much like Bitcoin Core's wallet.dat, and also you will get a seed which can generate the content of this file anywhere you are at without holding the file (so save it somewhere that nobody can see it or better memorize them and destroy it).

Will electrum allow me to send coins to multiple addresses in a single transaction with a SegWit address, just like I do with my Legacy address?

In bitcoin it's best to be paranoid about security so don't use that address anymore and consider it compromised.
If it's really compromised then whoever holds the private key can sign messages also.

I won't be using that address anymore, but to make everyone aware of the same, what should be done? Making a thread in Meta and signing a message with that address saying that its private key was used on a website and I believe it's now compromised, so don't send any coins there if someone asks anything by signing a message from that address. Will it do?

[Xynerise]

Will electrum allow me to send coins to multiple addresses in a single transaction with a SegWit address, just like I do with my Legacy address?
Yes, you can do the same things with segwit that you can with legacy addresses, the only difference is that segwit transactions have lower fees.


I won't be using that address anymore, but to make everyone aware of the same, what should be done? Making a thread in Meta and signing a message with that address saying that its private key was used on a website and I believe it's now compromised, so don't send any coins there if someone asks anything by signing a message from that address. Will it do?

Yea, that will do IF the people going to send you coins check the meta section in the first place.
You can alternatively keep the private key of the address in case it's not actually compromised and  you eventually receive any payments there.
But DO NOT give it out as a receiving address any more.

[TheQuin]

Yes, that transaction was done by me only. And I checked the source, which is why I used my private key there when I was online. I believe I should not receive any coins over that address anymore but should keep it to sign messages.

That's good news. I always keep the private keys to all my old addresses for that reason. As was already pointed out if a key is compromised then potentially someone else could also sign a message but it is an unlikely way to hijack a bitcointalk account.

Can you answer my queries told in the same comment?

I'm not sure exactly which queries you mean. If it is about signing messages using Segwit addresses then the answer is not to use P2SH-P2WPKH addresses (the ones that start with 3) but to use bech32 native Segwit addresses starting bc1.
I've been using this on Electrum since mid-November. With Electrum it is easy to use multiple wallets so I've kept my legacy address wallet so I can still receive payments from sites that don't yet support withdrawals to bech32 addresses. Hopefully, after Core 0.16.0 is released then everyone will start to introduce support and I can retire the legacy wallet.

[Stedsm]

Yes, that transaction was done by me only. And I checked the source, which is why I used my private key there when I was online. I believe I should not receive any coins over that address anymore but should keep it to sign messages.

That's good news. I always keep the private keys to all my old addresses for that reason. As was already pointed out if a key is compromised then potentially someone else could also sign a message but it is an unlikely way to hijack a bitcointalk account.

I'll be opening a thread in Meta and telling people about the situation, so as to stop a "possible hack" of my account.

Can you answer my queries told in the same comment?

I'm not sure exactly which queries you mean. If it is about signing messages using Segwit addresses then the answer is not to use P2SH-P2WPKH addresses (the ones that start with 3) but to use bech32 native Segwit addresses starting bc1.
I've been using this on Electrum since mid-November. With Electrum it is easy to use multiple wallets so I've kept my legacy address wallet so I can still receive payments from sites that don't yet support withdrawals to bech32 addresses. Hopefully, after Core 0.16.0 is released then everyone will start to introduce support and I can retire the legacy wallet.

Thanks to you and everyone who helped me out, I've finally downloaded Electrum wallet, saved my key and generated SegWit addresses as well.
Don't know how will I be able to sign messages from these bech32 addresses, though. But I am all fine now and hope that it will be beneficial for me as well as the senders/receivers from/to whom I get/send Bitcoins. Will sign a message and post a thread in Meta in a few moments.

[TheQuin]

Don't know how will I be able to sign messages from these bech32 addresses, though.

In Electrum go to the Addresses tab select the address with right click Sign/verify Message put your message in and click sign, it will ask for your password and then give you the signature.

Here's one I just did:

Message: Test signed message from TheQuin

Address: bc1q94c5auxrxzhgk5uyuee0e2nu2xwf5wz8r67sj5

Signature: IJ5AyA/s7laKapHX1Ml1XPn37QpiER/5ahQvDbYefd4FLF4Owi48Jvr23VeAG/2JZ3Yt/mHndSJjvAy9WFq1uxI=

The only drawback is that only people with a wallet that is capable of using Bech32 addresses can verify it. So you should be able to verify that on your Electrum but not on the websites that do verifications. It is not possible to verify the Segwit addresses starting with 3 at all because of the way they are encapsulated in a multisig address.

[Stedsm]

In Electrum go to the Addresses tab select the address with right click Sign/verify Message put your message in and click sign, it will ask for your password and then give you the signature.

Here's one I just did:

Message: Test signed message from TheQuin

Address: bc1q94c5auxrxzhgk5uyuee0e2nu2xwf5wz8r67sj5

Signature: IJ5AyA/s7laKapHX1Ml1XPn37QpiER/5ahQvDbYefd4FLF4Owi48Jvr23VeAG/2JZ3Yt/mHndSJjvAy9WFq1uxI=

The only drawback is that only people with a wallet that is capable of using Bech32 addresses can verify it. So you should be able to verify that on your Electrum but not on the websites that do verifications. It is not possible to verify the Segwit addresses starting with 3 at all because of the way they are encapsulated in a multisig address.

A thumbs up to you, the message has been successfully verified.
I saw one more thing that I can't check bech32 addresses over blockchain.info's explorer?! It says "Unrecognized search pattern."
Can you guide me more on that? I mean, any explorers that support bech32 addresses to show balance and transactions?
Things are getting easier for me with SegWit, I hope that less fee and quick confirms will be back in my life.