How to sign a message?!

[harizen]

Thank you very much for your effort to create this guide.

I'm using XAPO only wallet, is their any help available on how to sign a message from this wallet?

Many thanks in advance

I see that you are using online wallet. If you want to have your address sign using an online wallet , you can try Blockchain (as stated in first page) or Coinbase (I recommend this).

[shane]

Thank you very much for your effort to create this guide.

I'm using XAPO only wallet, is their any help available on how to sign a message from this wallet?

Many thanks in advance

xapo not give member to acces publick key
may be you can use coinbase that good online wallet too with 0% fee ( like xapo) aned he give member acces to create sign a message

but im recomended you to use electrum or mycellium ( mobile device)

[shorena]

Brainwallet is now Closed Permanently[1,2] and thus there is currently no way to verify a signed message with having a client or using a service that requires a login. At least to my knowledge. If you know about a site that is able to verify signatures please let me know. For more about why the site is down see these[3] defcon slides or wait for the speech to be available as video. The tl;dr is: brainwallets are bad if done wrong and most do it wrong. My assumption currently is that this is the reason the site is down, which sadly also takes down the features that can be used without risk.

As Im currently not at home it will take some time till more verify guides are available.

[1] https://brainwallet.org/
[2] https://twitter.com/brainwallet/status/629759260004630528
[3] https://rya.nc/cracking_cryptocurrency_brainwallets.pdf

[Muhammed Zakir]

Brainwallet is now Closed Permanently[1,2] and thus there is currently no way to verify a signed message with having a client or using a service that requires a login. At least to my knowledge. If you know about a site that is able to verify signatures please let me know. For more about why the site is down see these[3] defcon slides or wait for the speech to be available as video. The tl;dr is: brainwallets are bad if done wrong and most do it wrong. My assumption currently is that this is the reason the site is down, which sadly also takes down the features that can be used without risk.

As Im currently not at home it will take some time till more verify guides are available.

[1] https://brainwallet.org/
[2] https://twitter.com/brainwallet/status/629759260004630528
[3] https://rya.nc/cracking_cryptocurrency_brainwallets.pdf

http://coinig.com/.

[shorena]

Brainwallet is now Closed Permanently[1,2] and thus there is currently no way to verify a signed message with having a client or using a service that requires a login. At least to my knowledge. If you know about a site that is able to verify signatures please let me know. For more about why the site is down see these[3] defcon slides or wait for the speech to be available as video. The tl;dr is: brainwallets are bad if done wrong and most do it wrong. My assumption currently is that this is the reason the site is down, which sadly also takes down the features that can be used without risk.

As Im currently not at home it will take some time till more verify guides are available.

[1] https://brainwallet.org/
[2] https://twitter.com/brainwallet/status/629759260004630528
[3] https://rya.nc/cracking_cryptocurrency_brainwallets.pdf

http://coinig.com/.

Awesome, will add it ASAP.

[RichBC]

http://coinig.com/. seems to work well, you just need to enter the info in 3 fields rather than in a block with headers.

[trinaldao]

Brainwallet is now Closed Permanently[1,2] and thus there is currently no way to verify a signed message with having a client or using a service that requires a login. At least to my knowledge. If you know about a site that is able to verify signatures please let me know. For more about why the site is down see these[3] defcon slides or wait for the speech to be available as video. The tl;dr is: brainwallets are bad if done wrong and most do it wrong. My assumption currently is that this is the reason the site is down, which sadly also takes down the features that can be used without risk.

As Im currently not at home it will take some time till more verify guides are available.

[1] https://brainwallet.org/
[2] https://twitter.com/brainwallet/status/629759260004630528
[3] https://rya.nc/cracking_cryptocurrency_brainwallets.pdf

http://coinig.com/.

Awesome, will add it ASAP.

I have tried it twice and success

https://bitcointalk.org/index.php?topic=996318.msg12083790#msg12083790
https://bitcointalk.org/index.php?topic=996318.msg12083800#msg12083800

[Muhammed Zakir]

Brainwallet is now Closed Permanently[1,2] and thus there is currently no way to verify a signed message with having a client or using a service that requires a login. At least to my knowledge. If you know about a site that is able to verify signatures please let me know. For more about why the site is down see these[3] defcon slides or wait for the speech to be available as video. The tl;dr is: brainwallets are bad if done wrong and most do it wrong. My assumption currently is that this is the reason the site is down, which sadly also takes down the features that can be used without risk.

As Im currently not at home it will take some time till more verify guides are available.

[1] https://brainwallet.org/
[2] https://twitter.com/brainwallet/status/629759260004630528
[3] https://rya.nc/cracking_cryptocurrency_brainwallets.pdf

http://coinig.com/.

Awesome, will add it ASAP.

Yeah! It uses jackjack's signing/verifying tool - jasvet.

http://coinig.com/. seems to work well, you just need to enter the info in 3 fields rather than in a block with headers.

You can do the same in Brainwallet.org too!

[CrackedLogic]

I vote for this to be stickied here and in the lending section.

[shorena]

I vote for this to be stickied here and in the lending section.

It was denied[1] in the past. The unofficial rules now have a link here, maybe you can contact someone that made a sticky in the lending section to add a link as well. Too many stickies are not good, a reference should be enough.

[1] https://bitcointalk.org/index.php?topic=1113040.0

[shorena]

Brainwallet is now Closed Permanently[1,2] and thus there is currently no way to verify a signed message with having a client or using a service that requires a login. At least to my knowledge. If you know about a site that is able to verify signatures please let me know. For more about why the site is down see these[3] defcon slides or wait for the speech to be available as video. The tl;dr is: brainwallets are bad if done wrong and most do it wrong. My assumption currently is that this is the reason the site is down, which sadly also takes down the features that can be used without risk.

As Im currently not at home it will take some time till more verify guides are available.

[1] https://brainwallet.org/
[2] https://twitter.com/brainwallet/status/629759260004630528
[3] https://rya.nc/cracking_cryptocurrency_brainwallets.pdf

http://coinig.com/.

Awesome, will add it ASAP.

Yeah! It uses jackjack's signing/verifying tool - jasvet.

http://coinig.com/. seems to work well, you just need to enter the info in 3 fields rather than in a block with headers.

You can do the same in Brainwallet.org too!

Do you know how to contact the devs? Its jackjack's lib, but there seems to be something wrong. This is what happened when I tried to make the picture just now.



Edit:

Contacted chainquery as they have thread here: https://bitcointalk.org/index.php?topic=1115048.msg12097893#msg12097893

[lolnapp]

just want to check can greenbits sign a message?
if yes, how

[Muhammed Zakir]

Brainwallet is now Closed Permanently[1,2] and thus there is currently no way to verify a signed message with having a client or using a service that requires a login. At least to my knowledge. If you know about a site that is able to verify signatures please let me know. For more about why the site is down see these[3] defcon slides or wait for the speech to be available as video. The tl;dr is: brainwallets are bad if done wrong and most do it wrong. My assumption currently is that this is the reason the site is down, which sadly also takes down the features that can be used without risk.

As Im currently not at home it will take some time till more verify guides are available.

[1] https://brainwallet.org/
[2] https://twitter.com/brainwallet/status/629759260004630528
[3] https://rya.nc/cracking_cryptocurrency_brainwallets.pdf

http://coinig.com/.

Awesome, will add it ASAP.

Yeah! It uses jackjack's signing/verifying tool - jasvet.

http://coinig.com/. seems to work well, you just need to enter the info in 3 fields rather than in a block with headers.

You can do the same in Brainwallet.org too!

Do you know how to contact the devs? Its jackjack's lib, but there seems to be something wrong. This is what happened when I tried to make the picture just now.

[ img]https://i.imgur.com/wpWnwV8.png[/img]

Edit:

Contacted chainquery as they have thread here: https://bitcointalk.org/index.php?topic=1115048.msg12097893#msg12097893

I have contacted jackjack and also I am looking for the developer of coinig.

just want to check can greenbits sign a message?
if yes, how

You can't.

[lolnapp]

just want to check can greenbits sign a message?
if yes, how

You can't.
[/quote]

so...is it better to change an wallet with sign message funtion?
as I may want to sell the account in the future.

[shorena]

-snip-
I have contacted jackjack and also I am looking for the developer of coinig.

Thanks.

just want to check can greenbits sign a message?
if yes, how

You can't.

Correct, this is true for all multi sig addresses or services that use multi sig. The problem is that there is no standard how a signature would be done with more than one key[1].

-snip-
so...is it better to change an wallet with sign message funtion?
as I may want to sell the account in the future.

You dont have to use the same wallet for signing as you use for spending. You can create a wallet just for signing messages.

[1] https://www.reddit.com/r/Bitcoin/comments/2k3t9c/can_i_sign_a_message_using_greenaddress/clhmbq2

[Muhammed Zakir]

-snip-
I have contacted jackjack and also I am looking for the developer of coinig.

Thanks.

 -snip-

It seems like the developer has gone awol^[1] and the website will expire next month. So its better to wait till we get another website.

[1] http://bitcoin.stackexchange.com/users/7195/gregorvolkmann

[shorena]

-snip-
I have contacted jackjack and also I am looking for the developer of coinig.

Thanks.

 -snip-

It seems like the developer has gone awol^[1] and the website will expire next month. So its better to wait till we get another website.

[1] http://bitcoin.stackexchange.com/users/7195/gregorvolkmann

windpath the dev behind Chainquery is very responsive though[1]. Im very positive they will get it fixed soon. The site might be a bit overwhelming, but I planed to add the major clients anyway. This will be a good motivation to do so.

Edit: Its fixed now, I added a link and will make the pictures soon.

[1] https://bitcointalk.org/index.php?topic=1115048.msg12098376#msg12098376

[yummyransom]

Nice tutorial. It will helps a lot especially for those newbie out there.

[shorena]

Nice tutorial. It will helps a lot especially for those newbie out there.

thanks.

Have added pictures for chain query[1,2] now.


[1] https://bitcointalk.org/index.php?topic=990345.msg10775516#post_chainquery
[2] http://chainquery.com/bitcoin-api/verifymessage

[prodigy8]

The tutorial is awesome, more and more people need to see this, it's well explained.