[ESHOP launched] Trezor: Bitcoin hardware wallet - page 60.

chrisrico

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Quote from: Erdogan on June 04, 2015, 04:15:36 PM

I thought they changed it.

They extended the Chrome app so that you can configure the Trezor without sending any data to Satoshi Labs (or anyone). However, myTREZOR (or the wallet of your choice) still needs to know which addresses have been used in order to determine your balance and history.

Erdogan

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Quote from: molecular on June 04, 2015, 04:08:42 PM

Quote from: Erdogan on June 04, 2015, 03:02:09 PM

I wonder: (With a little thinking the obvious answers come, but please comment if it is wrong).

If the Trezor in its current incarnation does not send the XPUB key(s) to the MyTrezor server,

it does, though (well, not the trezor, but the js wallet):

Quote from: slush on June 01, 2015, 04:16:37 AM

mytrezor.com wallet sends xpub to server to retrieve transaction history.

I thought they changed it.

molecular

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Quote from: Erdogan on June 04, 2015, 03:02:09 PM

I wonder: (With a little thinking the obvious answers come, but please comment if it is wrong).

If the Trezor in its current incarnation does not send the XPUB key(s) to the MyTrezor server,

it does, though (well, not the trezor, but the js wallet):

Quote from: slush on June 01, 2015, 04:16:37 AM

mytrezor.com wallet sends xpub to server to retrieve transaction history.

Erdogan

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I wonder: (With a little thinking the obvious answers come, but please comment if it is wrong).

If the Trezor in its current incarnation does not send the XPUB key(s) to the MyTrezor server, how can it know how many keys are necessary to send? For example, in the change fork in each account, a new address is used (mostly) each time a payment is made. Let's say I have made 150 payments, and the first 149 change addresses are 0. How would the server know it should ask for the 150th?

EDIT: It could check for each address that it has been used and ~~abandoned~~ spent, so the UTXO is not enough, it needs the whole blockchain.

EDIT2: And after the spent addresses, it can ask for a number of unused addresses, just in case the user has skipped some.

EDIT3: And if the server had the XPUB, it would have to compute the addresses on the server side.

molecular

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Quote from: cypherdoc on June 04, 2015, 10:36:23 AM

Quote from: Carlton Banks on June 04, 2015, 05:10:47 AM

Quote from: chrisrico on June 03, 2015, 11:27:11 PM

Quote from: cypherdoc on June 01, 2015, 11:54:25 AM

Quote from: slush on June 01, 2015, 04:16:37 AM

mytrezor.com wallet sends xpub to server to retrieve transaction history. However Chrome extension does the device management without revealing any information to our servers. It is completely standalone application, so it does not even reveal your IP to us.

and just to be clear i understand the terms, xpub means "master public key", correct?

thanks for clarifying.

The master public key for the account, not the entire tree of accounts.

I think the terminology used in BIP 32 was:

xpub means extended public key, and generates all public keys for a single private key (i.e. single Trezor account)
a master public key generates all xpubs for a single seed

[/b][/b]
[/list]

I don't know how closely everyone follows the same terminology, but you'd think it would be pretty faithful seeing as slush and I think also stick talk on the developers mailing list about this wallet related stuff.

that's even more confusing.

i thought the xpub is a single root master public key (derived from a single root master private key) from which all child public keys are derived. this same root master public key (xpub) can parent many different branches of child public keys.

what carlton said was indeed confusing (there's only one address for each private key, for example).

You can derive an xpub for any node in the tree. Can be root node or account level node or even further down.

Carlton Banks

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Quote from: cypherdoc on June 04, 2015, 10:36:23 AM

that's even more confusing.

it's possible I have it wrong, but that's how I understood it. It's all just nomenclature though; I think we have the details correct if not the names.

cypherdoc

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Quote from: Carlton Banks on June 04, 2015, 05:10:47 AM

Quote from: chrisrico on June 03, 2015, 11:27:11 PM

Quote from: cypherdoc on June 01, 2015, 11:54:25 AM

Quote from: slush on June 01, 2015, 04:16:37 AM

mytrezor.com wallet sends xpub to server to retrieve transaction history. However Chrome extension does the device management without revealing any information to our servers. It is completely standalone application, so it does not even reveal your IP to us.

and just to be clear i understand the terms, xpub means "master public key", correct?

thanks for clarifying.

The master public key for the account, not the entire tree of accounts.

I think the terminology used in BIP 32 was:

xpub means extended public key, and generates all public keys for a single private key (i.e. single Trezor account)
a master public key generates all xpubs for a single seed

[/b][/b]
[/list]

I don't know how closely everyone follows the same terminology, but you'd think it would be pretty faithful seeing as slush and I think also stick talk on the developers mailing list about this wallet related stuff.

that's even more confusing.

i thought the xpub is a single root master public key (derived from a single root master private key) from which all child public keys are derived. this same root master public key (xpub) can parent many different branches of child public keys.

cypherdoc

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Quote from: chrisrico on June 03, 2015, 11:27:11 PM

Quote from: cypherdoc on June 01, 2015, 11:54:25 AM

Quote from: slush on June 01, 2015, 04:16:37 AM

mytrezor.com wallet sends xpub to server to retrieve transaction history. However Chrome extension does the device management without revealing any information to our servers. It is completely standalone application, so it does not even reveal your IP to us.

and just to be clear i understand the terms, xpub means "master public key", correct?

thanks for clarifying.

The master public key for the account, not the entire tree of accounts.

but it does reveal used addresses.

Carlton Banks

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Activity: 3430

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Quote from: chrisrico on June 03, 2015, 11:27:11 PM

Quote from: cypherdoc on June 01, 2015, 11:54:25 AM

Quote from: slush on June 01, 2015, 04:16:37 AM

mytrezor.com wallet sends xpub to server to retrieve transaction history. However Chrome extension does the device management without revealing any information to our servers. It is completely standalone application, so it does not even reveal your IP to us.

and just to be clear i understand the terms, xpub means "master public key", correct?

thanks for clarifying.

The master public key for the account, not the entire tree of accounts.

I think the terminology used in BIP 32 was:

xpub means extended public key, and generates all public keys for a single private key (i.e. single Trezor account)
a master public key generates all xpubs for a single seed

I don't know how closely everyone follows the same terminology, but you'd think it would be pretty faithful seeing as slush and I think also stick talk on the developers mailing list about this wallet related stuff.

Muhammed Zakir

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I prefer Zakir over Muhammed when mentioning me!

Quote from: dsattler on June 04, 2015, 01:38:36 AM

Quote from: dsattler on June 02, 2015, 07:46:30 AM

I need some help with my trezor!

I have two accounts (with two passwords) on my trezor, one is working OK and shows all transactions. The other one shows the total BTC amount, but doesn't show the list of transactions.
I'm using mytrezor.com in chrome or IE (doesn't matter), OS is Windows 7 64-Bit. My trezor has the newest firmware.

I've looked in the log and found this:

Quote

Please help!

Anybody?

Try using Electrum.

dsattler

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Quote from: dsattler on June 02, 2015, 07:46:30 AM

I need some help with my trezor!

I have two accounts (with two passwords) on my trezor, one is working OK and shows all transactions. The other one shows the total BTC amount, but doesn't show the list of transactions.
I'm using mytrezor.com in chrome or IE (doesn't matter), OS is Windows 7 64-Bit. My trezor has the newest firmware.

I've looked in the log and found this:

Quote

Please help!

Anybody?

chrisrico

hero member

Activity: 496

Merit: 500

Quote from: cypherdoc on June 01, 2015, 11:54:25 AM

Quote from: slush on June 01, 2015, 04:16:37 AM

mytrezor.com wallet sends xpub to server to retrieve transaction history. However Chrome extension does the device management without revealing any information to our servers. It is completely standalone application, so it does not even reveal your IP to us.

and just to be clear i understand the terms, xpub means "master public key", correct?

thanks for clarifying.

The master public key for the account, not the entire tree of accounts.

arorts

sr. member

Activity: 408

Merit: 250

Quote from: ?? on ??

Quote from: arorts on May 27, 2015, 01:33:30 PM

My main issue is that the Trezor plugin for electrum fails to let me configure the "settings" button. I get this error when pressing that button in the Electrum wallet...

Code:

....in settings_dialog
layout.addWidget(QLabel(" %s" % self.wallet.get_client().get_device_id()),1,1)....

AttributeError: 'QtGuiTrezorClient' object has no attribute 'bad'

It also fails to be detected on occasions even after plugging the Trezor in/out a few times and/or restarting the computer. I'd say it randomly detects the presence of Trezor

Electrum 2.1.1 or above (2.2) Trezor setting button works correctly on Linux and OSX - it provides you the serial number of the Trezor and allows you to change the nickname of the device. I have not tried the Windows version. If the issue persists, report it on the Electrum subforum https://bitcointalk.org/index.php?board=98.0.

Regarding the random detection, it is a known issue caused by a poor quality USB cable (like the one shipping with the Trezor). Try a different cable.

The issue I'm describing happens precisely with Linux. Will check in the referred thread. Thank you.

dsattler

legendary

Activity: 924

Merit: 1000

I need some help with my trezor!

I have two accounts (with two passwords) on my trezor, one is working OK and shows all transactions. The other one shows the total BTC amount, but doesn't show the list of transactions.
I'm using mytrezor.com in chrome or IE (doesn't matter), OS is Windows 7 64-Bit. My trezor has the newest firmware.

I've looked in the log and found this:

Quote

Please help!

Muhammed Zakir

hero member

Activity: 560

Merit: 509

I prefer Zakir over Muhammed when mentioning me!

Quote from: cypherdoc on June 01, 2015, 11:54:25 AM

Quote from: slush on June 01, 2015, 04:16:37 AM

mytrezor.com wallet sends xpub to server to retrieve transaction history. However Chrome extension does the device management without revealing any information to our servers. It is completely standalone application, so it does not even reveal your IP to us.

and just to be clear i understand the terms, xpub means "master public key", correct?

thanks for clarifying.

Yes.

running

newbie

Activity: 40

Merit: 0

Quote from: cypherdoc on May 29, 2015, 05:33:43 PM

is there a way to initialize a Trezor seed w/o revealing the master pubkey to mytrezor.com? is that what python trezor is for? can it be done through Mycelium?

As you said, you can do it via python-trezor, which is low-level, but not very user-friendly

or, you can now use the chrome app, as many people noticed without us officially presenting it

cypherdoc

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Quote from: slush on June 01, 2015, 04:16:37 AM

mytrezor.com wallet sends xpub to server to retrieve transaction history. However Chrome extension does the device management without revealing any information to our servers. It is completely standalone application, so it does not even reveal your IP to us.

and just to be clear i understand the terms, xpub means "master public key", correct?

thanks for clarifying.

slush

legendary

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mytrezor.com wallet sends xpub to server to retrieve transaction history. However Chrome extension does the device management without revealing any information to our servers. It is completely standalone application, so it does not even reveal your IP to us.

molecular

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Quote from: cypherdoc on May 31, 2015, 04:14:24 PM

Quote from: molecular on May 31, 2015, 02:48:06 PM

Quote from: cypherdoc on May 31, 2015, 12:15:17 PM

Quote from: molecular on May 30, 2015, 01:37:35 AM

Quote from: cypherdoc on May 29, 2015, 05:33:43 PM

is there a way to initialize a Trezor seed w/o revealing the master pubkey to mytrezor.com? is that what python trezor is for? can it be done through Mycelium?

I'm not sure the master pubkey is revealed to mytrezor.com at all. I vaguely remember slush or stick saying it wasn't the case. Does anybody know for sure or can point to the relevant part in the client code?

it does capture it in advanced settings, or somewhere like that.

if "it" is the client side javascript code, the I have no problem with that. Question is: is it sent to the mytrezor.com server?

so everything i see on my browser screen isn't necessarily transmitted to myTrezor.com? i thought it would have to be b/c that master pubkey is definitely in one their setting windows.

No, it isn't. Think of your browsers javascript engine and html document view as providing a runtime for an application.

An example where this is easy to see are browser-based paperwallet generators: you can see the private key "on the page", but it's not sent to the server.

molecular

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Quote from: ?? on ??

I think they definitly need to have the master pub key for the website to display balances
(Or maybe only the created pub key ?)

Why? It's entirely possible to have the client generate the addresses and send them to the server instead of the xpub key. It might look like 'wasting bandwidth', but it's really 'preserving future privacy'

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