We had a pretty good discussion going in another thread but I want to discuss my understanding of one specific scenario and get feedback.  Yes, I will moderate this thread but I promise I will only delete totally off topic post and personal insults.  All actual input is welcome.  Even AnonyMint is welcome.

Here is the exact scenario I want to discuss:

1) A cartel gains 50% of the hashing power
2) The same cartel controls about 50% of all the Bitcoin nodes.  These nodes act just like the standard nodes for the most part but the cartel controls the code and can therefore update them to change the rules as they see fit at any time.
3) The cartel decides that the block reward should remain at 25 BTC per block forever

Now the big day comes when the block reward is to go from 25 BTC to 12.5 BTC.  The cartel updates all of the nodes under their control to continue to accept 25 BTC blocks.

Assume the cartel get the first block of the 12.5 BTC era but, per their plan, they continue with the 25 BTC reward.

All of the Bitcoin nodes and miners under their control accept the block and start to build on it.  Let's call this chain the A chain and the nodes accepting the A chain the A network.

All the other Bitcoin nodes reject the block with the 25 BTC reward per the protocol.

Eventually a 12.5 BTC reward block is produced and accepted by the network and a chain is built from there.  Let's call this the B chain and all the nodes accepting this chain the B network.

Here is what I believe to be true, everyone please correct me if I am wrong anywhere:

1)  From then on every single block built on the A chain will be rejected by the B network.
2)  From then on every single block built on the B chain will be rejected by the A network.
3)  However, every single transaction that is considered valid by both networks will go into blocks in both chains.
4)  The BTC created by the block rewards in the A chain will not be considered valid by the B network and every single transaction touched by these coins will be dropped as invaid by the B network.
5)  The BTC created by the block rewards in the B chain will not be considered valid by the A network and every single transaction touched by these coins will be dropped as invaid by the A network.

The localbitcoins user kagomeluvsu2 tried to scam me and wasted a bunch of my time.  He wanted me to send him a screenshot of our transaction "for security reasons".  Playing along I sent him the screen shot.  Then he had the balls to ask me to "click on the show button" (to show the SMS code to release the BTC) and resend the picture.

His phone numbers are 281-891-3127, 913-200-1331 and 913-210-0571 in case anyone is interested.

I have only seen this discussed in the newbies section so I thought I would open a thread here for a more technical discussion of this issue.

Several people have reported their BTC stolen and sent to https://blockchain.info/address/1HKywxiL4JziqXrzLKhmB6a74ma6kxbSDj

As you can see the address currently contains 55.82152538 stolen coins.

It has been noticed that the coins are all transferred in a few hours after a client improperly signs a transaction by reusing the same random number.  As discussed here:

http://en.wikipedia.org/wiki/Elliptic_Curve_DSA

the reuse of the same k value allows anyone to be able to recover the private key.

It appears that this is what may be happening.

It appears that the bug occurs in both the blockchain.info android wallet and the Andreas Schildbach Android Wallet so I suspect a bug in a crypto library or an implementation detail shared by both applications.

This has been discussed in this thread https://bitcointalk.org/index.php?topic=251743.0 with the more technical posts being these two:

https://bitcointalk.org/index.php?topic=251743.msg2890179#msg2890179
https://bitcointalk.org/index.php?topic=251743.msg2890736#msg2890736

Check out the two transactions posted here (which did lead to a theft of 0.9184236 BTC in this transaction https://blockchain.info/tx/211c135e58dc55bcce4c71dc02eae2dffc5a55387c29e8144bf1cd1e8878e52e)

@Xeno-Genesis

For you the bad transactions were
https://blockchain.info/tx/b6350f4339a59faf09bfc2a4086c2261598f46f257517ce53785145c964799bc
https://blockchain.info/tx/38fbb8a3ff718dd7c8006feb6aa9ed6add1772522781b0db95abb350a859220b

which use the same R-value in the signature.  It is strange that the same random number was generated in two transactions that are four days apart.  This doesn't fit the usual pattern. Which bitcoin client do you use?

The stealing transaction occured less then five hours after the transaction that reused the R-value.

I got my activation code.  Now to choose a side.  Any other playes in the Boulder area?  Which side are you on?


Anyone have an Ingress activation code for me?

I would be playing in the Boulder area.

Have not chosen a side yet.  Convince me to join your side?

The address is the hash of the public key.

The public key can be compressed or uncompressed.

The hash of the compressed form would be different than the hash of the uncompressed form.

So, can you have two addresses for the same public key or is the address defined/specified as the hash of only one of the forms of the public key?

Will accept BTC for payment, see here:  http://phoenix.craigslist.org/evl/for/3691935847.html

Want to sell BTC for cash, face to face in the Denver/Boulder area if anyone is interested.

BurtW

I would actually prefer BTC for this car:

http://boulder.craigslist.org/cto/3715417959.html

I am in Boulder, Colorado.

Currently only

.

[You cannot already have an account.]

This promotion is to attract new players to SealsWithClubs.eu

SealsWithClubs.eu is an online poker site that uses Bitcoins

New SealsWithClubs.eu players opening new accounts only.  You cannot already have an account.  You must be new to the site.

Also, your bitcointalk.org account must have been registered before March 10th.  This is to prevent people from just registering new bitcointalk.org accounts just to get more free chips.

You will get 50 free poker chips to try out the site - enough to get you started.

If you are interested and meet the requirments send me a PM and I will send you a code to be used when you open your account.

Do not open an account until you get the code from me.

BurtW

[You cannot already have an account at SealsWithClubs.]

This promotion is to attract new players to SealsWithClubs.eu, an online poker site that uses Bitcoins

New SealsWithClubs.eu players opening new accounts only.  You cannot already have an account at SealsWithClubs.

You will get 50 free poker chips to try out the site - enough to get you started.

If you are interested and meet the requirments send me a PM or post here and I will send you a code to be used when you open your account.

Do not open an account until you get the code from me.

BurtW

Here is what happened:

1) I generated a keypair using vanitygen.  The public address is:  1RRAVeh1FpUCoyUZh44DzxQaeh3XZKwwc
2) I imported the private key into my Blockchain.info wallet
3) It showed up in my addresses list as expected
4) At this point there was a brief pop up, something about saving the wallet (not sure of exact text)
5) I sent a small payment to the address in order to "claim" it and the firstbits 1rrave (transaction).
6) I then tried to make a payment from the address to prove to myself everything was working
7) The Blockchain.info wallet reported back that it did not send the BTC back because it was trying to add a 0.0005 miner fee
Eight) At this point I went and did something else for a while and the wallet automatically logged me out
9) Later I came back and opened my wallet and sent another 0.0005 BTC to the address so I could send from it (transaction)
10) It suddenly dawned on me that I had not received my expected automatic back up of my wallet in my email - I was expecting it due to the private key import
11) I went to spend the BTC and the key pair no longer shows up in my wallet.  It is gone.
12) I had closed the vanitygen session so I no longer have the private key
13) I requested a backup of the wallet by email and got it, but I never got the backup due to the import

It appears that there was a glitch somewhere.  The imported key did show up in my wallet and was available until it automatically logged me off.  But somehow there was an error and it did not get saved.  The next time I logged in the key was no longer in my wallet.  It has not and I expect will not reappear.

Unless someone can think of something these 0.00051234 BTC are gone for good.

I was just lucky I did not send more to the address.  You can bet you ass I will keep a copy of the private key at least until I see the wallet backup in my email from now on!

Be careful out there.

I found this very interesting.  Paper, disposable USB drives:

http://www.gizmag.com/intellipaper-paper-based-usb-drives/25494/

Maybe these could be used for physical Bitcoin paper bills?

[I do not accept deposits.]

I have lent BTC for many purposes from mining equipment to personal loans.

In general you must meet the following conditions to get a loan from me:

1. More than 300 posts
2. Been registered for more than 2 months
3. Provide your email, IP address & any other id requested
4. over 18
5. Active in forum
6. At least 2 or 3 feedback/trades on forum

PM me or post here if interested.

I do not accept deposits.  All BTC for loans or investments come from my own personal BTC.

Code:

Paid Loans (previous good customers)

Date      Who                Loan  Due Date  Repaid    Notes
--------  ---------------  ------  --------  --------  --------
01/02/12  gigavps           50.00  02/01/12  01/16/12  early
01/17/12  rexcoin           10.00  02/01/12  01/17/12  early
01/18/12  rexcoin            8.00  01/20/12  01/18/12  early
01/26/12  mcorlett           3.00  02/03/12  01/27/12  early
01/28/12  jjzm               5.00  02/01/12  01/31/12  early
01/30/12  eviltt            10.00  02/04/12  02/06/12  on time
01/31/12  cablepair         17.00  02/10/12  02/06/12  early
02/11/12  cablepair         13.00  02/16/12  02/13/12  early
02/07/12  bitjet            45.00  02/14/12  02/14/12  on time
02/09/12  jackrabiit         7.00  02/19/12  02/18/12  early
02/05/12  hobo66            40.00  03/06/12  03/05/12  early
02/11/12  bitlane           25.00  03/11/12  03/06/12  early
02/27/12  reg                6.00  03/12/12  03/07/12  early
02/23/12  cablepair        120.00  03/24/12  03/13/12  early
02/15/12  INAU              40.00  03/15/12  03/15/12  on time
03/04/12  crosby            10.00  03/16/12  03/16/12  on time
02/11/12  kohta             33.00  03/19/12  03/17/12  early
03/08/12  jackrabiit        10.00  03/24/12  03/21/12  early
03/19/12  cablepair         80.00  04/03/12  03/26/12  early
03/25/12  bcjunkie           9.00  03/26/12  03/26/12  on time
03/28/12  jjzm               1.00  04/02/12  04/03/12  on time
03/08/12  goat              40.00  04/07/12  04/05/12  early
02/07/12  thiago            50.00  04/07/12  04/07/12  on time
03/19/12  gomeler           50.00  04/20/12  04/09/12  early
03/06/12  hobo66            40.00  05/05/12  04/17/12  early
03/30/12  bitlane           90.00  04/29/12  04/21/12  early
03/05/12  eveofwar         100.00  05/04/12  04/21/12  early
04/07/12  bitjet            51.50  04/27/12  04/25/12  early
03/29/12  cablepair        200.00  05/04/12  05/04/12  on time
05/02/12  JRO              100.00  05/16/12  05/16/12  on time
05/07/12  fabrizziop        40.00  06/21/12  06/04/12  early
05/07/12  tgmarks          100.00  06/06/12  06/06/12  on time
05/10/12  pyramining        55.00  06/10/12  06/10/12  early
04/09/12  crosby            75.00  05/24/12  06/15/12  on time
06/04/12  Turbor            30.00  07/04/12  06/19/12  early
06/27/12  BrightAnarchist  200.00  07/04/12  07/02/12  early
06/04/12  cablepair        300.00  07/04/12  07/04/12  on time
06/19/12  Turbor            35.00  07/19/12  07/07/12  early
06/07/12  tgmarks          100.00  07/07/12  07/07/12  on time
06/14/12  bravetheheat       1.00  07/10/12  07/10/12  on time
06/12/12  ciuciu GIGA      100.00  07/10/12  07/10/12  stock
06/12/12  ciuciu YABMC      25.00  07/10/12  07/10/12  stock
06/25/12  mc_lovin          50.00  08/24/12  07/10/12  early
07/13/12  roulette         100.00  08/07/12  07/15/12  game
06/23/12  Philj            250.00  09/21/12  07/17/12  early
05/22/12  hobo66            60.00  07/19/12  07/20/12  slow
05/31/12  Mr Teal           75.00  07/30/12  07/30/12  on time
06/05/12  jackrabiit        12.00  07/24/12  08/01/12  slow
01/18/12  Ultima Fund       10.00  08/01/12  08/01/12  bad
07/13/12  mc_lovin          60.00  09/11/12  08/01/12  early
07/14/12  Turbor           200.00  08/13/12  08/02/12  early
07/10/12  tgmarks          100.00  08/10/12  08/10/12  on time
08/17/12  lester           200.00  08/18/12  08/18/12  on time
08/26/12  Scott J            2.00  08/26/12  08/26/12  on time
09/03/12  Thunderbit         2.00  09/04/12  09/04/12  on time
09/04/12  Hunger Coins      15.00  09/04/12  09/04/12  on time
08/20/12  jackrabiit         5.00  09/02/12  09/02/12  on time
09/02/12  jackrabiit         3.00  09/09/12  09/09/12  on time
09/13/12  Tittiez            5.00  09/20/12  09/14/12  early
10/01/12  theboss           50.00  10/31/12  10/02/12  early
10/02/12  theboss           40.00  10/03/12  10/03/12  on time
09/22/12  RandomQ            5.00  10/22/12  10/10/12  early
10/10/12  theboss           30.00  11/09/12  10/11/12  early
09/15/12  AndrewBUD         50.00  10/20/12  10/16/12  early
10/18/12  TradeFortress      1.00  10/23/12  10/19/12  early
10/23/12  jackrabiit         5.00  11/07/12  11/01/12  early
10/21/12  Immuzikation     200.00  11/16/12  11/16/12  early
11/10/12  Tittiez            1.05  11/24/12  11/21/12  early
11/06/12  AndrewBUD         17.00  12/06/12  11/24/12  early
11/20/12  jackrabiit         4.00  12/20/12  11/28/12  early
10/30/12  mc_lovin          17.00  11/29/12  11/29/12  on time
11/15/12  Niann              2.00  12/15/12  12/07/12  early
12/20/12  Niann              3.00  01/19/13  01/07/13  early
01/17/13  TangibleCrypt    200.00  01/18/13  01/18/13  on time
11/22/12  Tittiez           10.00  02/22/13  01/21/13  early
01/24/13  Projects          30.00  01/27/13  01/25/13  early
01/26/13  Projects          25.00  01/29/13  01/27/13  early
01/23/13  xx78213            0.01  01/30/13  01/28/13  early
01/24/13  hardup             0.50  02/03/13  02/03/13  on time
02/03/13  Projects          25.00  02/06/13  02/07/13  on time
01/17/13  mc_lovin          50.00  01/31/13  02/09/13  slow
02/10/13  Projects          30.00  02/13/13  02/11/13  on time
01/21/13  Niann              2.00  02/20/13  02/12/13  early
02/12/13  Projects          50.00  02/26/13  02/16/13  early
02/24/13  jackrabiit         1.00  03/04/13  03/04/13  on time
02/19/13  Projects          50.00  03/12/13  03/10/13  early
03/03/13  thepwnorbpwnd      3.00  04/02/13  03/11/13  early
03/20/13  bomboclat77        0.50  03/27/13  03/21/13  early
03/25/13  Jenger             0.50  03/29/13  03/28/13  early

Just based upon the price (too good) I assume this is a phishing site - beware.

http://btkoin.com/

Code:

Domain Name.......... btkoin.com
 Creation Date........ 2012-08-18
 Registration Date.... 2012-08-18
 Expiry Date.......... 2013-08-18
 Tracking Number...... 1739484791_DOMAIN_COM-VRSN
 Organisation Name.... Gy Ddf
 Organisation Address. xing ling gang jie 98 hao
 Organisation Address. 
Organisation Address. 
Organisation Address. feng xing shi
 Organisation Address. 562548
 Organisation Address. AL
 Organisation Address. UNITED STATES

Admin Name........... Gy Ddf
 Admin Address........ xing ling gang jie 98 hao
 Admin Address........ 
Admin Address........ 
Admin Address. feng xing shi
 Admin Address........ 562548
 Admin Address........ AL
 Admin Address........ UNITED STATES
 Admin Email.......... btkoincom@yahoo.com
 Admin Phone.......... +1.052685478569
 Admin Fax............ 

Tech Name............ YahooDomains TechContact
 Tech Address......... 701 First Ave.
 Tech Address......... 
Tech Address......... 
Tech Address......... Sunnyvale
 Tech Address......... 94089
 Tech Address......... CA
 Tech Address......... UNITED STATES
 Tech Email........... domain.tech@yahoo-inc.com
 Tech Phone........... +1.4089162124
 Tech Fax............. 
Name Server.......... f1g1ns1.dnspod.net
 Name Server.......... f1g1ns2.dnspod.net

 Registrar: MELBOURNE IT, LTD. D/B/A INTERNET NAMES WORLDWIDE
 Whois Server: whois.melbourneit.com
 Creation Date: 17-AUG-2012
 Updated Date: 17-AUG-2012
Expiration Date: 17-AUG-2013

 Nameserver: F1G1NS1.DNSPOD.NET
 Nameserver: F1G1NS2.DNSPOD.NET

 Registry Status: ok

[you owe me the BTC!]

Here are the rules.  I will pass 100 BTC on to someone I trust.  They will pass it on to someone they trust.  If the person you pass it on to runs with the BTC then you owe me the BTC!  If you get the BTC and you cannot think of anyone you would trust with it then just give it back to me.

My address is 1BurtWEejbnKeBRsvcydJvsNztB1bXV5iQ

Simple?  Who want the 100 BTC first?

Remember.  If you pass it on to someone you must totally trust them because if they "lose it in a hack" you personally owe the money back to me.

EDIT:  Two new rules!

You must either pass it on or give it back within 24 hours of getting it.

I want it back after 100 handoffs at most.

The path so far:

Code:

Username  Bitcoin Address                     Transaction                                                       Date and Time
--------  ----------------------------------  ----------------------------------------------------------------  -------------------
BurtW     13eFc6L2tARem3eLXzvtGBH4HHiBXEFmns  cd1f5d9d01bc4f946a01ce8cca9c26c6a6cf563a2ade4cc9594569b35fdf3d88  2012-07-14 03:38:55
Garr255   1Garr2555P4oiAaLQqXkcdAKGg4SMt3RZS  1d6796f01bf309ef1ce667503d898836fb2b47ed01611af8e1ce605dfc0ad1f1  2012-07-14 05:06:48
imsaguy   1AauSNjhWNycxZN26JYUHMUkYLrkkXGocA  b097ba24b97f16f583c957e29f990efbb15704d32befa8d682a8a41e5c9c9afd  2012-07-14 17:08:43
Otoh      1G5apmPvo2iTtmkNWAHTCET7Y842Ufijs8  215cd951efe7e63823ef341e7156f0f92af650597d7c06c6a66af3d25a8b6508  2012-07-15 00:13:33
payb.tc   17dR4ac33UvNQPbSsckL6yGZRGmnaeGt68  91a36e5fc09f4e458dbc796969738424081cbc182f53f45008099c70ab4b6442  2012-07-15 05:11:59
payb.tc   1FmC6gUV1tkT7HHmQzo3NwtgZs3WGSz4Rd  
payb.tc   Multiple inputs, see transaction    59bd92d3fddae0939fd43ce040ab2a9b8129be22a2521b59d8bb1a5be5a1c0e4  2012-07-15 12:27:54
BurtW     1BurtWEejbnKeBRsvcydJvsNztB1bXV5iQ

.

I suggest everyone go visit klamm.us and slam them with bogus orders because they are spamming this forum.

.

.