davidgdg



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Hero MemberActivity: 537Merit: 500 Re: Blockchain.info - Bitcoin Block explorer & Currency Statistics October 15, 2013, 12:37:36 PM #2723 The mining profit and electricity consumption stats are said to be based on electricity consumption of 600 w/gigahash. This is out of date by factor of at least 100 . Can you update? (Block Erupters are about 7.5 w/ghs and some of the newer ASICS are under a watt). Otherwise the false impression is being given that the network is hugely inefficient in terms of electricity consumption, which is unfortunate.

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VTC



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MemberActivity: 83Merit: 14 Re: Blockchain.info - Bitcoin Block explorer & Currency Statistics October 17, 2013, 06:23:38 PM #2728 Quote from: VTC on October 15, 2013, 08:33:59 AM Not 100% sure, but with the new chrome app, the inactivity timeout loggout doesn't seem to work.



I have it set to default 10 minutes and it never logs me off, whereas before I had to relogin all the time.



Yeah it definitely doesn't log off after inactivity.

Also, after typing in the secondary password to make a transaction, it will never prompt again till next session.

Because of these two factors, a user's chrome app wallet left minimized and computer left unattended, all coins can be subject to theft.



IMO, the secondary password should function like a PIN, and needs to be entered for each transaction. The secondary password should only expose the private keys to the system just for signing the transaction. Yeah it definitely doesn't log off after inactivity.Also, after typing in the secondary password to make a transaction, it will never prompt again till next session.Because of these two factors, a user's chrome app wallet left minimized and computer left unattended, all coins can be subject to theft.IMO, the secondary password should function like a PIN, and needs to be entered for each transaction. The secondary password should only expose the private keys to the system just for signing the transaction.

ThePiachu



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Sr. MemberActivity: 443Merit: 262 Re: Blockchain.info - Bitcoin Block explorer & Currency Statistics October 18, 2013, 10:02:12 PM #2730



As far as I was able to check, the blockchain wallet uses uncompressed public keys by default. Since it is very popular, a lot of people are using uncompressed keys. If you were to switch over to compressed public keys, each transaction sent from the wallets using those keys would be smaller, meaning the future blocks could accommodate more transactions. Just a way to be forward thinking and "greener" .



More info on compressed public key - Feature suggestion - using compressed public keys by defaultAs far as I was able to check, the blockchain wallet uses uncompressed public keys by default. Since it is very popular, a lot of people are using uncompressed keys. If you were to switch over to compressed public keys, each transaction sent from the wallets using those keys would be smaller, meaning the future blocks could accommodate more transactions. Just a way to be forward thinking and "greener"More info on compressed public key - http://bitcoin.stackexchange.com/questions/3059/what-is-a-compressed-bitcoin-key

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Hero MemberActivity: 833Merit: 1000"How do you eat an elephant? One bit at a time..." Re: Blockchain.info - Bitcoin Block explorer & Currency Statistics October 18, 2013, 10:15:49 PM #2732 Quote from: ThePiachu on October 18, 2013, 10:02:12 PM



As far as I was able to check, the blockchain wallet uses uncompressed public keys by default. Since it is very popular, a lot of people are using uncompressed keys. If you were to switch over to compressed public keys, each transaction sent from the wallets using those keys would be smaller, meaning the future blocks could accommodate more transactions. Just a way to be forward thinking and "greener" .



More info on compressed public key -

Feature suggestion - using compressed public keys by defaultAs far as I was able to check, the blockchain wallet uses uncompressed public keys by default. Since it is very popular, a lot of people are using uncompressed keys. If you were to switch over to compressed public keys, each transaction sent from the wallets using those keys would be smaller, meaning the future blocks could accommodate more transactions. Just a way to be forward thinking and "greener"More info on compressed public key - http://bitcoin.stackexchange.com/questions/3059/what-is-a-compressed-bitcoin-key

You could even get fancy and give us the option to pick our exchange (for price) and give the option to enter a % premium or % discount. You could even get fancy and give us the option to pick our exchange (for price) and give the option to enter a % premium or % discount.

ratty



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Sr. MemberActivity: 261Merit: 250 Re: Blockchain.info - Bitcoin Block explorer & Currency Statistics October 19, 2013, 01:04:47 AM #2734 I totally agree they should do compressed keys, but for those of you that want to use them now, you can import private keys made from other clients, so you can make a compressed key with another client then import it into blockchain.info. And no I'm not saying they shouldn't add the ability to create them, but you can technically do it now with some hassle.



You can tell if a key is compressed if it starts with an L or a K. Uncompressed keys start with a 5.



piuk



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Hero MemberActivity: 910Merit: 1001 Re: Blockchain.info - Bitcoin Block explorer & Currency Statistics October 19, 2013, 11:53:52 AM

Last edit: October 19, 2013, 07:38:13 PM by piuk #2737 Sharedcoin trustless mixing now available for testing



Sharedcoin uses a technique known as coinjoin to provide coin mixing without needing to trust any third party with your funds. The service still relies on a centralised server but that server only co-ordinates transactions without any funds passing through it. The main advantages are significantly less risk for both the user and operator and no requirement to keep any logs.



Anyone interested in testing can login using the following link:



https://blockchain.info/wallet/login?enable_sharedcoin=true



Please test with small amounts only (0.5 BTC max). 0.1 BTC is the minimum send amount. If you experience any errors please record the output from the



The current client stages are:



- The client will submit its "offer", which is the inputs it wants mixing and the desired outputs.

- The server waits a certain amount of time for other clients to submit their offers.

- The server combines everyone's offers and creates a "proposal".

- The clients check they are happy with the proposal and signs their inputs.

- The server submits the final transaction.



The entire process takes about 40 seconds.



Features currently supported:



- Variable number of inputs and outputs per client

- Variable input and output values.

- Randomised fees.

- Ability to draw upon reserve funds when no other participants are available for mixing.

- Taint analysis determines the appropriate inputs to mix.



Features planned:



- Multiple iterations using temporary addresses never saved inside wallets.

- Better randomisation of change outputs and splitting of outputs between multiple iterations.

- Better progress indication.

- Documented Client APIs and SDK.



Example sharedcoin transaction:

https://blockchain.info/tx/72316782bf48d0cd232b888a7b9ea03f88ba79fac28273cd2aa1804683235412?show_adv=true



The amount currently available in the reserve pool is low, this will be gradually increased over time but during the testing phase if anyone manages to manipulate the client to withdraw excess funds from the pool they can keep that amount.



Client source available at:

Server status can be viewed while testing at: Sharedcoin uses a technique known as coinjoin to provide coin mixing without needing to trust any third party with your funds. The service still relies on a centralised server but that server only co-ordinates transactions without any funds passing through it. The main advantages are significantly less risk for both the user and operator and no requirement to keep any logs.Anyone interested in testing can login using the following link:Please test with small amounts only (0.5 BTC max). 0.1 BTC is the minimum send amount. If you experience any errors please record the output from the javascript console The current client stages are:- The client will submit its "offer", which is the inputs it wants mixing and the desired outputs.- The server waits a certain amount of time for other clients to submit their offers.- The server combines everyone's offers and creates a "proposal".- The clients check they are happy with the proposal and signs their inputs.- The server submits the final transaction.The entire process takes about 40 seconds.Features currently supported:- Variable number of inputs and outputs per client- Variable input and output values.- Randomised fees.- Ability to draw upon reserve funds when no other participants are available for mixing.- Taint analysis determines the appropriate inputs to mix.Features planned:- Multiple iterations using temporary addresses never saved inside wallets.- Better randomisation of change outputs and splitting of outputs between multiple iterations.- Better progress indication.- Documented Client APIs and SDK.Example sharedcoin transaction:The amount currently available in the reserve pool is low, this will be gradually increased over time but during the testing phase if anyone manages to manipulate the client to withdraw excess funds from the pool they can keep that amount.Client source available at: https://github.com/blockchain/My-Wallet/blob/master/sharedcoin.js Server status can be viewed while testing at: https://api.sharedcoin.com/ Try a My Wallet Demo Account