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Author Topic: Blockchain.info - Bitcoin Block explorer & Currency Statistics  (Read 319136 times)
Stephen Gornick
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April 21, 2013, 07:51:59 AM
 #2301

I'm wondering why Blockchain.info is having trouble with this transaction:

 - https://blockchain.info/tx/d3887aa543417c6934e7831407d017ec15b4b288a23cdd2977505a6ea1aff739

When I enabled "Advanced" I click on the (Spent), which is the URL:
 - https://blockchain.info/tx-index/66120873

but am given the response:  "Transaction not found"

But here is that transaction:
 - https://blockchain.info/tx/440a659b8298dcc0ac336e1c245472f6bcc48a90d978a746241c74b4368ae92e

So is this just an indexing error somewhere?

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whiskers75
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April 21, 2013, 10:04:56 AM
 #2302

Put a warning up about enabling 2 factor auth - I lost 1.2 BTC due to a "It would take a desktop PC about 175 years to crack your password" password. (http://howsecureismypassword.net)

whiskers75.co.uk - you'll find me more active on IRC than I am here.
Timbo925
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April 21, 2013, 12:02:03 PM
 #2303

Put a warning up about enabling 2 factor auth - I lost 1.2 BTC due to a "It would take a desktop PC about 175 years to crack your password" password. (http://howsecureismypassword.net)


Dont test your password at these kind of sites. Just plain stupid to enter it somewhere online to test the strengt ...

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April 21, 2013, 12:24:58 PM
 #2304

Put a warning up about enabling 2 factor auth - I lost 1.2 BTC due to a "It would take a desktop PC about 175 years to crack your password" password. (http://howsecureismypassword.net)


Dont test your password at these kind of sites. Just plain stupid to enter it somewhere online to test the strengt ...
The website uses only Javascript.
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April 21, 2013, 12:26:10 PM
 #2305

Please Blockchain.info redirect HTTP to HTTPS always like Bitcointalk and MtGox do.
Also in the wallet login page warn users to check the green bar in the url.
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April 21, 2013, 05:51:51 PM
 #2306

Thanks for the reset piuk!!!!!!

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April 21, 2013, 11:45:19 PM
 #2307

Put a warning up about enabling 2 factor auth - I lost 1.2 BTC due to a "It would take a desktop PC about 175 years to crack your password" password. (http://howsecureismypassword.net)


Dont test your password at these kind of sites. Just plain stupid to enter it somewhere online to test the strengt ...
I would trust https://www.grc.com/haystack.htm

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John (John K.)
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April 23, 2013, 02:31:19 PM
 #2308

PS: The site's having problems again:

Code:
Got error 157 'Unknown error code' from NDBCLUSTER

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April 23, 2013, 02:35:55 PM
 #2309

Yup, latest transaction shown is now 15 mins old. Can't login to my wallet.
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April 23, 2013, 02:59:39 PM
 #2310

Any problems with the site please check twitter as https://twitter.com/blockchain as a first port of call.

John (John K.)
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April 23, 2013, 03:03:56 PM
 #2311

Any problems with the site please check twitter as https://twitter.com/blockchain as a first port of call.
Okay, thanks.

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April 23, 2013, 03:37:21 PM
 #2312

Piuk, can you comment on the Amazon S3 backup regime for deleted private keys - i.e. if I were to upload a private key and then later on delete it - are old copies of the encrypted wallet file still stored on S3 - and if so, for how long?

Regards,

Will

piuk - I wondered if you had a moment to answer my question about the S3 backups...?

Will

hazek
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April 24, 2013, 09:36:11 AM
 #2313

I was just suggested to pay a 0.005 fee by the blockchain app. The app is really great however I really miss the option to enter a specific fee. The choice right now seems to be to either not pay anything or to pay what the app suggests..

My personality type: INTJ - please forgive my weaknesses (Not naturally in tune with others feelings; may be insensitive at times, tend to respond to conflict with logic and reason, tend to believe I'm always right)

If however you enjoyed my post: 15j781DjuJeVsZgYbDVt2NZsGrWKRWFHpp
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April 24, 2013, 12:03:26 PM
 #2314

Changes to Alias Resolving

When a wallet is accessed using an alias if the browser does not already have the wallet identifier saved or have an authorised login session email authorisation will now be required.



If the browser is perviously recognised by blockchain no authorisation is required. Wallets can still be accessed directly by identifier, which provides 128 bits of entropy and should always be kept secret.

For example if you visit my personal wallet: https://blockchain.info/wallet/piuk if will appear as if no wallet exists however I will receive an authorisation email.

A number of users have reported their wallet being compromised to me, the exact cause is unknown (I suspect malware) however in pretty much all cases the user has set a wallet alias which is the same as their bitcointalk username (and used on other sites). This is common practice, however it much more secure if the wallet identifier and alias are kept secret. The above changes are meant to address this problem.

I will respond to the above posts shortly, apologies for the delay.

ghostshirt
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April 24, 2013, 12:31:22 PM
 #2315

Hello,

How does Blockchain.info calculate a transaction fee? I've made a 2420-byte transaction and paid 0.0015 BTC, I thought 0.0005 is the norm for Bitcoin network (for now).

ErebusBat
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April 24, 2013, 12:31:50 PM
 #2316

A number of users have reported their wallet being compromised to me, the exact cause is unknown (I suspect malware) however in pretty much all cases the user has set a wallet alias which is the same as their bitcointalk username (and used on other sites). This is common practice, however it much more secure if the wallet identifier and alias are kept secret. The above changes are meant to address this problem.

I will respond to the above posts shortly, apologies for the delay.
I love this.  I will let you know if I start to get a ton of emails from unknown browsers.

HOWEVER if this is indeed malware targeted at BCI it would be a very trivial task to either just steal the wallet identifier/blob from the browser (we already know they have the password).  So we may not see a decline in these reports if this is the cause (however this is still a great feature!).  PLEASE ENABLE TWO FACTOR AUTHENTICATION PEOPLE!

Ben:  Has anyone ever reported a theft from BCI while 2FA was enabled on their account?

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ErebusBat
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April 24, 2013, 12:32:31 PM
 #2317

Hello,

How does Blockchain.info calculate a transaction fee? I've made a 2420-byte transaction and paid 0.0015 BTC, I thought 0.0005 is the norm for Bitcoin network (for now).
It depends on how big (BTC wise) and how old the inputs are.

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April 24, 2013, 01:07:00 PM
 #2318


Ben:  Has anyone ever reported a theft from BCI while 2FA was enabled on their account?

Today: http://www.reddit.com/r/Bitcoin/comments/1czrua/just_lost_160_btc_from_address_managed_with/
Gaff
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April 24, 2013, 01:12:43 PM
 #2319

Changes to Alias Resolving

When a wallet is accessed using an alias if the browser does not already have the wallet identifier saved or have an authorised login session email authorisation will now be required.



If the browser is perviously recognised by blockchain no authorisation is required. Wallet can still be accessed directly by identifier, which provides 128 bits of entropy and should always be kept secret.

For example if you visit my personal wallet: https://blockchain.info/wallet/piuk if will appear as if no wallet exists however I will receive an authorisation email.

A number of users have reported their wallet being compromised to me, the exact cause is unknown (I suspect malware) however in pretty much all cases the user has set a wallet alias which is the same as their bitcointalk username (and used on other sites). This is common practice, however it much more secure if the wallet identifier and alias are kept secret. The above changes are meant to address this problem.

I will respond to the above posts shortly, apologies for the delay.


I like this change - but blockchain.info assumes my email is secure. I don't think this is a great assumption.

Question: Shouldn't 2-factor authentication be sufficient here? If I have the right identifier and I pass the 2-factor check *then* you can send me the encrypted wallet?
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April 24, 2013, 01:21:19 PM
 #2320

Changes to Alias Resolving

...Also given the recent scandal with Instawallet URLs being searchable via Google - can you send a one-time-alias URL rather than the real identifier?
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