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1  Alternate cryptocurrencies / Announcements (Altcoins) / Re: Citadel - BlimpHash-B PoW-CPU. CryptoNote-Based. on: November 10, 2019, 02:06:01 PM
Will there be an update of the announcement?
There, many links are out of date.
Are there any development plans?

Thank you for pointing this out, OP will be updated once possible.

Releases will be made without prior notice.
2  Alternate cryptocurrencies / Announcements (Altcoins) / Re: Citadel - BlimpHash-B PoW-CPU. CryptoNote-Based. on: November 10, 2019, 11:42:25 AM
"Empty" release pushed to github.

https://github.com/cntemple/Citadel/releases/tag/Empty

Updated seed-nodes.
Annoying logger messages removed.
3  Alternate cryptocurrencies / Announcements (Altcoins) / Re: Citadel - BlimpHash-B PoW-CPU. CryptoNote-Based. on: November 09, 2019, 03:14:33 PM
managed to start mining. In a daemon, this line is often:
Quote
15:39:38.564664 ERROR An attempt of too deep reorganization: 125471, BLOCK REJECTED
this is normal?
And what are your plans for a coin, a site, new exchanges?

It isn't really an "error" rather just a "log" message, you can just ignore it. Website is down for maintenance though explorer is up on chain.citadelplatform.org.

We also consider Citadel one of the most secure cryptonotes, without flaws on ringct's like several Monero clones or other known issues.

Someone is trying to croak the network and lay blame on u afterwards. This is the principal issue with decentralization: everyone does what they want and everyone could walk away like nothing happened. I would love to impress some control into those who are accustomed to being untamed. I will tame them. True decentralization is years away from now and it will remain this way until masses smarten up.

You are quite right Tarz, we are years away from true decentralization, eg: most exchanges will only take a coin with a bct announcement ( few exceptions may apply), given bitcointalk has restricted number of users/views it's always impossible to get to everyone even though I agree it's a start, however it illustrates on how it only keeps reaching the same kind of audience ( existing crypto watchers).
4  Alternate cryptocurrencies / Announcements (Altcoins) / Re: Citadel - BlimpHash-B PoW-CPU. CryptoNote-Based. on: November 09, 2019, 02:45:59 PM
managed to start mining. In a daemon, this line is often:
Quote
15:39:38.564664 ERROR An attempt of too deep reorganization: 125471, BLOCK REJECTED
this is normal?
And what are your plans for a coin, a site, new exchanges?

It isn't really an "error" rather just a "log" message, you can just ignore it. Website is down for maintenance though explorer is up on chain.citadelplatform.org.

We also consider Citadel one of the most secure cryptonotes, without flaws on ringct's like several Monero clones or other known issues.
5  Alternate cryptocurrencies / Announcements (Altcoins) / Re: Citadel - BlimpHash-B PoW-CPU. CryptoNote-Based. on: November 08, 2019, 11:13:27 PM
How to mine a solo using a gui-wallet?
Or how to mine solo in general, is there an instruction?

Quote
How to start mining?

1. Launch command line (CLI) "citadeld.exe" and "citadelwallet.exe"

2. Wait for Citadel daemon to be synced ("SYNCHRONIZED OK")

3. Open Citadelwallet.exe and input "start_mining x" where x is your number of threads.

4. On daemon ( citadeld.exe) input "show_hr" so you can see your mining hashrate.



Next week will be releasing a miner for ARM architecture.



6  Alternate cryptocurrencies / Announcements (Altcoins) / Re: Citadel - BlimpHash-B PoW-CPU. CryptoNote-Based. on: November 03, 2019, 11:00:26 PM
No work pools - https://miningpoolstats.stream/citadel
Are there compiled binaries for Linux?
and instructions on how to start the pool, which hashing algorithm?
need an example of setting up the pool.

There aren't pre-compiled binaries for Linux as we assume Linux user is sort of experienced user.

Citadel has been solo mined for some time now, algo is BlimpHash-B, no pools as of now.

Website is also down for maintenance.

 51.15.215.178:55008
 51.15.133.208:55008

are some nodes you can use if you run into sync issues. ( which shouldn't happen if compiled from source )

You can also calculate your earnings on http://chain.citadelplatform.org/#pools calculator.

7  Alternate cryptocurrencies / Announcements (Altcoins) / Re: Citadel - A CryptoNote-Based Anonymous Digital Services on: July 03, 2019, 02:42:19 PM


Citadel is changing it's hashing algorithm, introducing BlimpHash-B.

Solo-mining, at least for now.

Mandatory update for clients and services:

https://github.com/cntemple/Citadel/releases/tag/new_POW

Once again, I urge those who didn't update yet to do so.

Join us on https://t.me/citadelplatform and share your benchmarks.
8  Alternate cryptocurrencies / Announcements (Altcoins) / Re: Citadel - BlimpHash-B PoW. CryptoNote-Based. on: July 02, 2019, 01:39:29 PM
network corrupted, transactions canceled

Why so?

Chain is running just fine as always.

Check yourself: http://chain.citadelplatform.org/#
9  Alternate cryptocurrencies / Announcements (Altcoins) / Re: Citadel - BlimpHash-B PoW. CryptoNote-Based. on: June 30, 2019, 02:31:33 PM


We welcome everyone for CPU benchmarks for the new mining algorithm which is already active.

How to start mining?

1. Launch command line (CLI) "citadeld.exe" and "citadelwallet.exe"

2. Wait for Citadel daemon to be synced ("SYNCHRONIZED OK")

3. Open Citadelwallet.exe and input "start_mining x" where x is your number of threads.

4. On daemon ( citadeld.exe) input "show_hr" so you can see your mining hashrate.



10  Alternate cryptocurrencies / Announcements (Altcoins) / Re: Citadel - A CryptoNote-Based Anonymous Digital Services on: June 27, 2019, 07:43:12 AM


Citadel is changing it's hashing algorithm, introducing BlimpHash-B.

Solo-mining, at least for now.

Mandatory update for clients and services:

https://github.com/cntemple/Citadel/releases/tag/new_POW
11  Alternate cryptocurrencies / Announcements (Altcoins) / Re: Citadel - A CryptoNote-Based Anonymous Digital Services on: June 06, 2019, 10:13:18 PM
You can find it here: https://cntemple.github.io/Citadel-Paperwallet/
12  Alternate cryptocurrencies / Announcements (Altcoins) / Re: Citadel - A CryptoNote-Based Anonymous Digital Services on: June 05, 2019, 09:36:40 AM


Some Citadel important features.

Merged mining disability:

"Merged mining is the act of using work done on another blockchain (the Parent) on one or more than one Auxiliary blockchain and to accept it as valid on its own chain, using Auxiliary Proof-of-Work (AuxPoW), which is the relationship between two blockchains for one to trust the other's work as their own."

We do not "allow" it unlike other CryptoNotes, as we believe it may take value from the coin itself.



Zawy LWMA difficulty algorithm:

Difficulty algorithm proposed by Scott Roberts which solves the existing problems of default CryptoNote difficulty algorithm. These problems consist on 2 important points:


1. Renting Nicehash power during a short-period of time "hopping" to get almost all previous day blocks ( 360 in Citadel case).

2. Make it fair for "low power" miners. ( This is also enforced with 4 min block time )



51 % attack protection:

"Typical 51% attack on the cryptocurrency exchanges can be boiled down to the cancelling of the transaction during a switch to the alternative chain. To be able to cause a blockchain reorganization the malicious actor will need to gain control of more than 50% of a network’s hashrate, hence the name.

Put simply, the attacker submits to the network a transaction in which deposits coins to the exchange, while privately mining a blockchain fork in which a double-spending transaction is included instead or a deposit transaction is just absent. After waiting for n confirmations, the exchange credits coins to attacker account. He sells deposited coins and withdraws other currency. If the attacker happened to find more than n blocks at this point, he releases his fork and regains his coins; otherwise, he can try to continue extending his fork with the hope of being able to catch up with the network. If he never manages to do this, the attack fails, the payment to the exchange will go through, and the work done mining will also be wasted, as any new coins would be overwritten by the longest chain. [1]

The exchanges can require the large number of confirmations n, but if an attacker can continue to mine his alternative chain however long, this method will not protect the exchange. Nowadays, when there is available very large amount of hashrate for rent at attacker’s disposal we need better solution than just raise the n.

We propose the solution to disallow cancelling transactions during a switch to the alternative chain by adding the consensus rule stating that “an alternative chain should contain all transactions from the chain it is to replace”.

The protection against 51% attack will then look like this: in the case of a reorganization of the blockchain nodes compare transactions in the alternative chain and in the current main (their) chain and if at least one transaction is missing in their chain they reject the reorganization.

When this happens all missing transactions will be added into the mempool of the nodes proposing the alternative chain so they have chance to include those transactions into the next block then nodes on the main chain will reorganize to theirs chain and the reorganization will take place if their chain is longer. This allows to unite blockchain in the case of accident splits by the longest chain rule when it is not an attack or in the scenario where transaction is just missing from the attacker’s alternative chain.

In the case of contradicting transactions the nodes will endup in permanent chain split and will require manual intervention as both chains will reject each other because each will lack transaction from the other. In this situation the attacker will permanently lock himself in his alternative reality.

With this rule being effective if there is no contradicting transactions the blockchain can split and rejoin up to the length where the first transaction spending newly mined coins occurs, in other words, the reorganization length can be reduced to the mined money unlock window parameter’s value since miners can protect their chain just by spending mined coins as soon as they unlock. Therefore, to allow larger reorganizations this parameter should be set at reasonable value.

It can not be that simple though. Let’s consider the possible complications. The simple attack on network to cause chain spit can be conducted, let’s call it ‘split attack’: an attacker sends the same coins to himself via different nodes and if two nodes include contradicting transactions into different blocks they will go astray each in own chain. To mitigate such attack the comparison of transactions can be triggered not immediately when the reorganization occurs but if an alternative chain is longer than usual reorganization which is rarely more than 2 blocks i.e. after the ‘grace period’.

The introducing of grace period opens the way to bypass the comparison by ‘zakurai attack’ aka ‘lift to cancel’ attack: 51% capable miner can wait for n confirmations then do reorganization by reincluding transaction he wants to cancel into the last block then do small reorganization within the grace period in which transactions are not compared. It is possible to find out which transaction of contradicting ones was in the more premiere block but an attacker can include it into the earlier block in privately mined alt. chain than in the public chain i.e. it will first mine transaction in his hidden chain then send doublespending transaction to the exchange in the main chain in hope that we will take naive approach and select the block that appeared earlier. Therefore the ‘grace period’ method or selecting the chain where spending occurred first is futile. We know that an attacker spends coins in the public blockchain simultaneously mining a private alternative chain which he will try to impose instead of the public one. Therefore we should not give up public chain no matter what.

Trailing checkpoint system formed by the quorum of public and decentralized nodes can address the ‘split attack’ on public chain. It can not be, however, simple majority of nodes, because an attacker could run the large number of nodes under his control to fake votes in favor of his alternative chain. A quorum of masternodes is therefore required for selecting the ‘right’ chain. To run the masternode a collateral deposit is necessary which greatly reduces the possibility of attack because an attacker will have not only to gain 51% of network hashrate but also to make significant economical investment in collateral deposits in order to get control over the majority of masternodes.

This approach is pioneered in Karbo cryptocurrency, where it already helped to successfully withstand a 51% attack making it more secure and reliable not only without massive constant hashrate, but in the hostile hashrate environment, as it is still on original CryptoNight algorithm mineable by ASICs with lots of hashrate available for rent on Nicehash that was presumably used by the attacker during the failed attack."

Reference - https://medium.com/@karbo.org/prevent-transaction-cancellation-in-51-attack-79ba03d191f0

Citadel also uses this "protection".
13  Alternate cryptocurrencies / Announcements (Altcoins) / Re: Citadel - A CryptoNote-Based Anonymous Digital Services on: April 26, 2019, 07:11:50 AM
A simple schematic on how Citadel functions in a simple way.
14  Alternate cryptocurrencies / Announcements (Altcoins) / Re: ✅* Citadel - A CryptoNote-Based Anonymous Digital Services & E-Commerce Platform on: October 29, 2018, 08:52:15 PM
[MANDATORY WALLET UPDATE]  Soft fork for enhanced Citadel network security is scheduled to come into effect at block height 235,000, which is projected to occur around November 3-4th. Please, make sure to upgrade your wallets  before then at: https://github.com/cntemple/Citadel/releases/latest
15  Alternate cryptocurrencies / Announcements (Altcoins) / Re: ✅* Citadel - A CryptoNote-Based Anonymous Digital Services & E-Commerce Platform on: October 28, 2018, 08:06:40 PM
Join us at Discord to vote on Masternode collateral requirement: https://discord.gg/RZ9XdFw

Voting will close on 30th of October 3:00 PM UTC.
16  Alternate cryptocurrencies / Announcements (Altcoins) / Re: ✅* Citadel - A CryptoNote-Based Anonymous Digital Services & E-Commerce Platform on: September 05, 2018, 06:08:08 PM


Roadmap has been updated!

Ever since of the release of first roadmap, citadel project has completed following roadmap features- CTL-PAY, Gemstone Variant, Paper Wallet and Decentralized File Transfer and Hosting! Also, added new roadmap items CryoSyS and Open Alias.
17  Alternate cryptocurrencies / Announcements (Altcoins) / Citadel - BlimpHash-B PoW-CPU. CryptoNote-Based. on: May 31, 2018, 09:11:09 PM










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