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81  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Nxt :: descendant of Bitcoin on: October 26, 2013, 09:34:29 PM
Try again later, please.  That is the way distributed systems work, you have to wait for changes to propogate on the network.
82  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Nxt :: descendant of Bitcoin on: October 26, 2013, 08:36:43 PM
Follow me on Twitter @BCNext.
83  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Nxt :: descendant of Bitcoin on: October 26, 2013, 06:22:36 PM
You can't.  If you own less than 50% of the stake your chain will have smaller cumulative difficulty and will be ignored by other peers.  Even worse, due to lesser number of generating accounts you will face long delays more often.  One such delay can make you to wait for a hour ruining progress of 60 prior blocks.
84  Alternate cryptocurrencies / Altcoin Discussion / Re: What challenges would a pure Proof-of-stake coin face? on: October 26, 2013, 06:14:21 PM
You are welcome to join Nxt project.  In 2 months I will reveal the source code, until that you can contribute with ideas.

Colored coin amounts will be in the range from 1 to 1 billion units.  Each account will be able to issue up to 16777216 different "colors".
85  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Nxt :: descendant of Bitcoin on: October 26, 2013, 05:23:02 AM
Nxt has such features as

# Instant transactions ("0-confirmation transactions")
# Anonymity of IP address send transactions & mining blocks (with Tor or the cloud client)
# P2P exchange BTC (with colored coins)
# Faster difficulty changes (adjusted each block)
# Name doesn't contain "coin", "cash", "kash", "money", "dollar",  nor "bit" (at least now, Nxt is a codename)

VISA scale volume can be achieved with 32 Mbps connection.

I can not give an answer regarding Zerocoin/CoinJoin now, I am not very familiar with these concepts.
86  Alternate cryptocurrencies / Altcoin Discussion / Re: [Nxt] Decentralized App Store on: October 25, 2013, 08:46:58 PM
Messages will compete against transactions to be included into blocks.  It doesn't matter what bloats the blockchain -- messages or transactions.

We must understand that real world sets some restrictions and we can't bypass them.  The blockchain is a scarce resource we just have to find equilibrium between volume of data and fees.  That is what Economics for.
87  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Nxt :: descendant of Bitcoin on: October 25, 2013, 06:20:37 PM
Block generation is determined by previous blocks.  If you are doomed to generate next block in 3 hours you can prepare a block instantly, but you have to wait for 3 hours before you can reveal it (otherwise it will be ignored by the network).  You can build millions blockchains in parallel to find the best one for an attack, but at some point you will need someone else to generate a block (or wait again).  Nxt uses a novel PoS algorithm, not the one PPC, NVC and other altcoins do.  Nxt doesn't have their flaws.
88  Alternate cryptocurrencies / Altcoin Discussion / Re: [Nxt] Decentralized App Store on: October 25, 2013, 04:25:09 PM
Why to split data among different chains?  Keep it simple.

Reputation system will help to fight scammers.  It will not remove them completely but still...
89  Alternate cryptocurrencies / Altcoin Discussion / Re: What challenges would a pure Proof-of-stake coin face? on: October 25, 2013, 03:49:04 PM
Guys, I would like to hear your opinion about such PoS algorithm -- https://bitcointalk.org/index.php?topic=303898.msg3361014#msg3361014
90  Alternate cryptocurrencies / Altcoin Discussion / Re: [Nxt] Decentralized App Store on: October 25, 2013, 02:52:09 PM
1]  Each year the blockchain will be shrunk (automatically)
2]  A cloud version of the client should resolve this issue for users with low-end hardware
3]  Messages won't be included into the blockchain for free, you still have to pay a transaction fee, so you can't misuse this feature
91  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Nxt :: descendant of Bitcoin on: October 25, 2013, 02:45:17 PM
... including the security challenges of any PoS system.

That thread discusses a coin with completely different PoS algorithm.  The only argument that could be applied to Nxt is the Gavin's one.  But it's very doubtful that it is correct, it still requires a proof.  I could argue that a PoS coin is safer than a PoW one because PoW requires to waste electricity when PoS requires to waste time, which is a more scarce resource.
92  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Nxt :: descendant of Bitcoin on: October 25, 2013, 02:40:00 PM
Unlock an account using any digit as the secret phrase ("1" works good).
93  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Nxt :: descendant of Bitcoin on: October 25, 2013, 07:02:50 AM
Could anyone point me to a fast Ed25519 implementation in Java?  The current version uses a reference implementation and spends more than a whole second to verify a single signature.  This creates a lot of problems with transaction processing.  I could use C++ but this would lead to necessity to split the client into Linux and Windows branches.
94  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Nxt :: descendant of Bitcoin on: October 25, 2013, 06:32:10 AM
Yes, they do.  But if someone owns a little stake they can choose not to bother.
95  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Nxt :: descendant of Bitcoin on: October 24, 2013, 10:33:22 PM
I would like to get your feedback on Decentralized App Store (https://bitcointalk.org/index.php?topic=317607.0)
96  Alternate cryptocurrencies / Altcoin Discussion / [Nxt] Decentralized App Store on: October 24, 2013, 10:32:15 PM
This thread is dedicated to discussion of Nxt (https://bitcointalk.org/index.php?topic=303898.0) and its features.

Nxt has different features that make decentralized services real.  One of these features -- Messaging -- can be used to sell/buy digital goods represented by plain text.  Particularly to sell applications for computers/phones.

The workflow looks quite simple
1]  A developer sends a message describing a product (it's stored on the blockchain).
2]  A user sends a payment to the developer's account.
3]  The developer sends an encrypted message with a link or a code (stored on the blockchain as well).
4]  The user decrypts the message and uses the code to unlock premium in the application.

Key points
1]  Developer publishes their account on their webpage to prove they are the legitimate owner (or uses Reputation System of Nxt)
2]  All actions are public and can be audited (the encrypted message can be audited if one of the parties reveals the key)
3]  Only transaction fees are charged, 100% profit goes to the developer
4]  Noone can shut the store down nor they can DDoS it

Nxt client will have widgets that scan the blockchain and visualize digital goods.  I'd like to hear how this should look and what features should be implemented in the client software.
97  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Nxt :: descendant of Bitcoin on: October 24, 2013, 09:42:29 PM
You don't need to mine Nxt.  It's 100% proof-of-stake coin.
98  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Nxt :: descendant of Bitcoin on: October 24, 2013, 08:59:52 PM
UPDATE

Implemented bootstrapping and longest chain selection.
Max number of transactions per block is limited to 10 (to test transaction selection algorithm).
Added a bar with advanced features buttons (to show future features to those who don't read this forum).

http://88.198.210.245:7875/

http://5.135.165.137:7875/ should join later
99  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Nxt :: descendant of Bitcoin on: October 24, 2013, 07:22:18 PM
Good point.  I think after the launch I will create a Google Cloud version of the client to remove such obstacle as necessity to run software locally or care about hosting.
100  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [ANN] Nxt :: descendant of Bitcoin on: October 24, 2013, 02:17:03 PM
I am faced with the dilemma

1]  Implement Ed25519 signature in JavaScript  =>  Users do not need to install a client, they will open a browser and connect to someone's else client available on the Internet  =>  Number of peers will be small
2]  Leave Ed25519 signature on back-end side  =>  Users need to install a client  =>  Number of peers will be much greater

Any suggestions?
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