Bitcoin Forum
June 19, 2019, 06:23:58 PM *
News: Latest Bitcoin Core release: 0.18.0 [Torrent] (New!)
 
  Home Help Search Login Register More  
  Show Posts
Pages: « 1 2 3 4 5 6 7 8 [9] 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 »
161  Other / Meta / Re: Alternate crypto is huge on: December 16, 2013, 06:55:14 PM
This is bitcointalk, I don't think any alternative should even be on this forum personally.
This is bitcointalk, I don't think any alternative should even be on this forum personally.
+1
Altcoin developers can make their own talk forums.
+1
+1
162  Other / Meta / Re: New UK board request on: December 16, 2013, 06:52:21 PM
+1
163  Economy / Service Discussion / Re: My Coinbase was just compromised on: December 15, 2013, 04:12:22 PM
Doesn't make sense. How can a 2FA be stolen? It's a randomly generated value and only valid for a matter of seconds.

Unless you select Coinbase's option to not require 2FA again for 30 days from the same computer? If that PC is compromised with a keylogger, then it could be a problem.

Every time I enabled a 2FA I would take a screen shot of the code and keep it.  I believe it was either taken from my email or my desktop.  I only found some malware on my desktop, but then I said fuck it and wiped the whole disk.





Keeping a screenshot of the 2FA code in a place that itself is not protected is almost as dangerous as not having 2FA in the first place.

I suspect that Coinbase may stop allowing instant purchases + instant withdrawals to an external address because of incidents like this.
STOP PANICKING!

OP just screencap'd the 2FA code, which is a stupid idea, and lost it. Caveat emptor.
164  Bitcoin / Bitcoin Discussion / Re: How much btc was cheated off you before? on: December 15, 2013, 11:50:11 AM
Wait until all of TradeFortress' victims find this poll.
heh.
165  Bitcoin / Bitcoin Discussion / Re: 0 confirm instant transactions on: December 15, 2013, 10:59:39 AM
[Cross-posted from https://bitcointalk.org/index.php?topic=369589.msg3970813#msg3970813, I also think MikeyVeez is trolling and knows that zero-confirm transactions are fine for most purchases, and thus the winky face and the random and stupid CIA/Gavin accusation.]

Bitcoin is indeed faster than credit card: here in Vancouver several brick-and-mortar merchants accept bitcoin via BitPay.  It is standard to consider the invoice paid when the network picks up the transaction as valid.  This typically occurs in a fraction of second--faster than a credit card.  

The double-spend problem, to most users and vendors, most of the time, is academic.  Let's consider how you could double-spend against a coffee shop here in Vancouver:

DOUBLE SPEND ATTEMPT #1: (fails)

1-A.  You walk up to the counter and ask for your coffee.  The sales girl generates the BitPay invoice, you scan the QR code, and press "send" on your iPhone.  The BitPay app picks up the transaction on the network in a fraction of a second, and the invoice suddenly says "PAID."  You grab your coffee and leave.

1-B.  But you're sneaky: you quickly run into your car where you've already generated a raw transaction with the same coins you used to pay for your coffee, but in this fraudulent transaction you instead send the coins to an address you control (you used the brainwallet.org "transactions" page) .  You broadcast this transaction using blockchain.info's pushtx service (https://blockchain.info/pushtx).  What you will realize is that by the time you got back to your car, the original transaction has already propagated across the network.  This means that nodes will not relay this new fraudulent transaction and miners will not add it to their memory pool since they know that these coins were already spent.  Double-spend attempt #1 fails.  

DOUBLE SPEND ATTEMPT #2: (fails)

2-A.  Discouraged by your failure, you head back to your evil lair where you continue your plot to get free coffee.

2-B.  You decide that you need to broadcast both transactions at roughly the same time in order to have a better chance of success.  You need to do this *inside* the coffee shop, but all you have access to while inside the store is your blockchain.info app for iPhone.  So, you jail-break your phone and hire an iOS expert to create you a custom double-spend app.  This app by design sends out the transaction to the coffee shop, but also sends out a transaction to an address that you control.

2-C.  So you order your coffee and test out your app.  But the BitPay invoice never says "paid."  When the sales girl checks at blockchain.info, she sees a big red "DOUBLE SPEND DETECTED" warning beside the transaction.

2-D.  You don't get your coffee and leave the store with everyone thinking that you are a thief.  

DOUBLE SPEND ATTEMPT #3: (succeeds once and a while)

3-A.  Back at the lair, you realize that your quest for free coffee is more difficult than you actually thought.  You call up some nefarious miner that controls 30% of the global hash power.  You tell him that when you give him the signal, he should add your fraudulent transaction to his memory pool of unconfirmed transactions.  You pay your iPhone hacker to modify your app to send the evil miner a special signal when you buy your coffee.

3-B.  You go to the coffee shop and buy your coffee.  Your new app sends the signal to the evil miner that you're in cahoots with.  The miner adds your fraudulent transaction, while the real transaction propagates across the network.

3-C.  Since the evil miner controls 30% of the global hash power, your coffee is free 30% of the time.  

3-D.  Finally, you succeed!  You also decide it is a lot less work to just pay for your coffee normally...
That is the best read up I ever heard. Mind if I use it for a page on doublespends?
166  Bitcoin / Bitcoin Discussion / Re: Uh-oh. bitcoin.it (more or less official bitcoin wiki) domain name lost? on: December 15, 2013, 10:53:31 AM
It wasn't resolving earlier. Annoying, I've had to refer to google cached pages while coding my ticker, kittenco.in Tongue

Edit: Looks like it's coming back! http://en.bitcoin.it
Code:
Domain:             bitcoin.it
Status:             ok / autoRenewPeriod
Created:            2010-12-01 10:15:11
Last Update:        2013-12-15 09:52:09
Expire Date:        2013-12-01
167  Other / Meta / Re: Proposal: Highly ignored uses should have their posts less visible, with opacity on: December 15, 2013, 10:13:14 AM
This is a good idea, maybe an option in preferences? Tongue
168  Other / Meta / Re: BitcoinTalk++ script - v0.2.64 on: December 15, 2013, 07:45:09 AM
Thanks, I just checked, it's indeed an ABP "feature"

Can I remove notes by the way? If not, you could change the title of "Add Note" to "Remove Note" and change its function Tongue
Yes you can remove a note: replace it by an empty one

0.2.69 should finally solve all Chrome problems

Edit: added a "View posts" icon
Cool! Cheesy
169  Other / Meta / Re: AlternateTrust on: December 14, 2013, 07:32:10 PM
Aren't you supposed to post reasons?
DiamondCardz trusts me already Tongue
170  Other / Meta / Re: BitcoinTalk++ script - v0.2.64 on: December 14, 2013, 07:29:32 PM
Same here guys, I don't know what happens
Looking into it right now


Should be ok now

Same here, also:
Code:
The page at https://bitcointalk.org/index.php?topic=264337.new;topicseen#new displayed insecure content from http://btpp.jampa.eu/info.png.
It's not a problem, it just mean that BT++ load an image that is not https
I know, so buy a SSL cert Tongue
171  Other / Meta / Re: AVATAR won't load on: December 14, 2013, 06:25:22 AM
You should pm whiskers75 and ask him.

Grin And if he doesn't reply within ten minutes, resend the message.
*coughs*

AVATARS ARE DISABLED!

Thank you.
172  Other / Meta / Re: BitcoinTalk++ script - v0.2.64 on: December 13, 2013, 03:44:38 PM


Suddenly everything vanished. Even though bt++ script is loaded, only mtgox ticker & chat box showing.
Even deleted & installed script again.
windows, chrome, tampermonkey 0.2.64

Same here, also:
Code:
The page at https://bitcointalk.org/index.php?topic=264337.new;topicseen#new displayed insecure content from http://btpp.jampa.eu/info.png.
173  Other / Meta / Re: BitcoinTalk++ script - v0.2.63 on: December 12, 2013, 07:20:08 PM
My internet is so slow my chat isn't even loading...
I got to check that later

Still no luck with the add note?
Same here. What ISP do you use, out of interest?
174  Other / Meta / Re: Small question on: December 11, 2013, 06:41:17 PM
+1
Code something into your BT++ script to block users' trust ratings.
175  Economy / Service Announcements / [Interest gauge] Bitcointalk Signature Creator on: December 11, 2013, 06:25:04 PM
Would you like to see a tool to create signatures like this:


It would be totally browser-based, and not require any downloading/etc.

Thoughts?
176  Other / Meta / Small question on: December 11, 2013, 06:16:13 PM
How is just_me not permanently obliterated from this forum yet, along with his -777777777777777777.7777777777777777777 trust ratings? -.-
177  Other / Meta / Re: AlternateTrust on: December 11, 2013, 06:07:34 PM
Add me to AltTrust! Tongue
178  Other / Meta / Re: BitcoinTalk++ script - v0.2.61 on: December 11, 2013, 05:23:39 PM
If you don't like the Domain indicator, there's a setting for that Grin
You and your settings.

Do it the MANLY way with CSS!
179  Other / Meta / Re: My posts are not going through! on: December 11, 2013, 05:22:13 PM
Forum fact of life
(that needs to be added to the newbie readmes)

You will have to wait 6 minutes in between logging in, posting, searching, and other stuff.

DEAL WITH IT.
180  Other / Meta / Re: Problems with tor and the forum on: December 11, 2013, 05:20:07 PM
Come on theymos, do it!
and theymos won't respond because he's very unresponsive as of late
Pages: « 1 2 3 4 5 6 7 8 [9] 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 »
Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!