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...you can trade with just data so what happened with my over 250,000 sims I bought its showing I bought it...
Let's first see if blockchain.info will compensate this, as they should, because, as I understand, this is their bug.
Have you seen this?
https://twitter.com/blockchain/status/542106998150799360
"We admit we are at fault. We will be working w/affected users to reimburse those whose funds were misplaced."
I like the private asset exchange,i also proposed it in the main thread some days ago.
It would only need the possibility to issue an asset with a keypass,and the issuer would give the keypass to whoever he wants.It would be great for internal things in enterprises,or private groups,or things like for example a company issuing ticket-restaurants in a certain zone.
It would only need the possibility to issue an asset with a keypass,and the issuer would give the keypass to whoever he wants.It would be great for internal things in enterprises,or private groups,or things like for example a company issuing ticket-restaurants in a certain zone.
My prediction is that we will see many different kinds of marketplaces on top of the Nxt blockchain, with different features and rules. The Nxt network seems to be efficient enough to handle a large number of signalling transactions in addition to the normal spending transactions.
Outstanding. Looking forward to having a play with this.
Could be used to buy/sell crypto currencies by storing the address and private key and releasing them to a buyer? Or do I misunderstand?
Could be used to buy/sell crypto currencies by storing the address and private key and releasing them to a buyer? Or do I misunderstand?
I think so, yes. There is a danger that the seller would spend the coins at the same time as he sells them. But I think I read on the other thread that somebody is working for atomic cross-chain transactions, which would solve this issue, but I don't know a lot about that.
Good to see this discussion continued here, hard to follow in the massive Nxt thread. I still like the idea of magnet links listed in the client, click and the marketplace GUI is loaded into the client. There was a BTT member (Fry) that was interested in developing. Would love to get more brainstorming here, this could be a great thing to have.
I'm creating a command-line version as a proof of concept. I'll probably offer a bounty for a GUI version.
The marketplace creator could act as an administrator, who has the power to ban scammers.
When the marketplace is created, the following message is sent:
market_info/description/seller_fee/buyer_fee
Fees are one-time payments to the administrator to be able to participate in the marketplace. They can also be zero if the administrator so decides.
Administrator sends the following message to ban a user:
ban_account/account_number
Anyone not satistfied with the policies of the administrator can easily create their own marketplace.
When the marketplace is created, the following message is sent:
market_info/description/seller_fee/buyer_fee
Fees are one-time payments to the administrator to be able to participate in the marketplace. They can also be zero if the administrator so decides.
Administrator sends the following message to ban a user:
ban_account/account_number
Anyone not satistfied with the policies of the administrator can easily create their own marketplace.
The message format would need to be defined, so I'll just make something up. This is the private marketplace version, where the market is visible to those who know the marketplace password.
There can be a FileMarket (selling of files with arbitrary content) and MailOrder (seller sends the product in the mail). I'll begin with the FileMarket because it is easier.
Each message contains a prefix, which is the first 4 bytes of the SHA-256 hash of the marketplace password. Message content is encrypted with AES-256 using the marketplace password, except for the accept message, which should be readable only by the buyer.
Seller declares he sells something by sending himself a message:
sell/product name/description/price/keyword1(optional)/keyword2(optional)/keyword3(optional)/image link (optional, image is encrypted with marketplace password)
Setting keywords allows buyers to find products by searching.
Buyer sends the seller a message to buy:
buy/product name
Seller sends the decryption key for the file to the buyer:
accept/product name/download link/key
If for some reason seller can't complete the transaction:
reject/product name
User sends feedback to the seller:
feedback/product name/score/text
Seller feedback and available products be will be visible on the blockchain to those who know the marketplace password.
EDIT:
Seller sends himself a message to provide general information to the buyers:
seller_info/text/allow other sellers (yes/no)
The first seller can prohibit other sellers from joining the marketplace.
There can be a FileMarket (selling of files with arbitrary content) and MailOrder (seller sends the product in the mail). I'll begin with the FileMarket because it is easier.
Each message contains a prefix, which is the first 4 bytes of the SHA-256 hash of the marketplace password. Message content is encrypted with AES-256 using the marketplace password, except for the accept message, which should be readable only by the buyer.
Seller declares he sells something by sending himself a message:
sell/product name/description/price/keyword1(optional)/keyword2(optional)/keyword3(optional)/image link (optional, image is encrypted with marketplace password)
Setting keywords allows buyers to find products by searching.
Buyer sends the seller a message to buy:
buy/product name
Seller sends the decryption key for the file to the buyer:
accept/product name/download link/key
If for some reason seller can't complete the transaction:
reject/product name
User sends feedback to the seller:
feedback/product name/score/text
Seller feedback and available products be will be visible on the blockchain to those who know the marketplace password.
EDIT:
Seller sends himself a message to provide general information to the buyers:
seller_info/text/allow other sellers (yes/no)
The first seller can prohibit other sellers from joining the marketplace.
Here are some more thoughts. I'm thinking about private marketplaces on top of the Nxt blockchain. Products are visible only to the users of the marketplace, not to everyone viewing the blockchain.
EDIT: I deleted the previous idea. This is a simplified version. Marketplace name = password.
On the startup screen of the NxtPrivateMarketplace software the user enters the marketplace name, which also acts as a password.
This is less secure than having the program generate the password, but the result of the marketplace name getting found out by outsiders is not as catastrophic as somebody hacking your brainwallet.
EDIT: I deleted the previous idea. This is a simplified version. Marketplace name = password.
On the startup screen of the NxtPrivateMarketplace software the user enters the marketplace name, which also acts as a password.
This is less secure than having the program generate the password, but the result of the marketplace name getting found out by outsiders is not as catastrophic as somebody hacking your brainwallet.
My vision could be called NxtPrivateMarket, as opposed to the Nxt asset exchange, where product names are public, and which has a listing fee.
The private market would be implemented by program, which responds to messages coming to its Nxt address. The buyer sends a message and coins to that address to complete the transaction. The buyer side doesn't necessarily need a specialized program, any Nxt client will do if it can send encrypted messages. (I don't know if the Nxt clients already support that.) Perhaps a more user-friendly buyer-side program would be needed to get users.
If nobody is willing to implement this for a bounty, I can try to do a proof of concept of this myself.
The private market would be implemented by program, which responds to messages coming to its Nxt address. The buyer sends a message and coins to that address to complete the transaction. The buyer side doesn't necessarily need a specialized program, any Nxt client will do if it can send encrypted messages. (I don't know if the Nxt clients already support that.) Perhaps a more user-friendly buyer-side program would be needed to get users.
If nobody is willing to implement this for a bounty, I can try to do a proof of concept of this myself.
Outstanding. Looking forward to having a play with this.
Could be used to buy/sell crypto currencies by storing the address and private key and releasing them to a buyer? Or do I misunderstand?
Could be used to buy/sell crypto currencies by storing the address and private key and releasing them to a buyer? Or do I misunderstand?
I think so, yes. There is a danger that the seller would spend the coins at the same time as he sells them. But I think I read on the other thread that somebody is working for atomic cross-chain transactions, which would solve this issue, but I don't know a lot about that.
Could we have decentralized buying and selling of files (with any content)?
https://bitcointalk.org/index.php?topic=345619.msg5566784#msg5566784
https://bitcointalk.org/index.php?topic=345619.msg5566784#msg5566784
I'm not for trusting third party sites or software to do generation, though others may feel differently. I do welcome different views on the wiki 
Feel free to register (PM joefox, the wiki admin) and edit, or comment in the talk page.
Feel free to register (PM joefox, the wiki admin) and edit, or comment in the talk page.The bitaddress.org page can be also saved and used in offline mode. To my knowledge it is one of the most popular methods of generating Bitcoin paper wallets. If there is something more popular in the Bitcoin world, then I would recommend using the same method also for your NXT password. There is no need to reinvent the wheel here.
I need help with http://wiki.nxtcrypto.org/wiki/How-To:GenerateStrongPassword. I've looked at many sites that describe how to generate strong passwords. I find most unsatisfactory.
The example password "Tammy's#18bdayBIGpartyDroppedshibesweaterinpoolGMasonUsoon:(3yearsislong" on that page is weak.
Generating a NXT password is basically the same problem as creating a Bitcoin private key. bitaddress.org is to my knowledge a fairly trusted site. You can take the private key it generates and use it as your password.
The human brain should not be used to generate a password because it is not a good source of randomness.