Topic: [OFFICIAL] [SAFEX] Safe Exchange Coin [website www.safex.io] (Read 191610 times)

Hi xmaca, are you the scammer Marija Blesic? part of the team of scammers from SAFEX?

Can you explain why you invite your friend who is a a known scammer from Onecoin to give speech at Safex office in Belgrade? It is true that your friend has an arrest warrant issued in Bulgaria for his involvement of the promotion of Onecoin in that country?

Can tell us what happened to the official twitter account of the scam SAFEX and the scammer Daniel Dabek and the scammer Emilia Wojciechowicz? seems like Twitter suspend those accounts because they are scammers. There is no official communication for over two weeks, is Daniel hiding or planning an exit scam? When the Safex official twitter account will be reactivated?

What happened to the marketplace that was supposed to launch on December 10th 2020?
Why didn't launch?
https://archive.is/H7yw0

Have a nice day Marija.

Guys, don't forget to read latest blog posts on safex.org:

https://safex.org/blog/

Has it been delisted from Bittrex and Cryptopia? I am very behind information and news because it is starting to get busy at the moment. So I'm not updating.

Is this coin still alive? Ever since it got delisted from bittrex and cryptopia ... it went mute ...

Issue with mining attack?

Timestamp Attack: 
Block: 64786 timestamp: 1543718265, difficulty: 2092409798, nethash: 17.44MH
Block: 64787 timestamp: 1543718267, difficulty: 2095121665, nethash: 17.46MH
Block: 64796 timestamp: 1543718291, difficulty: 2189638825, nethash: 18.25MH

  This is a small sample from the timestamp attack.  The attacker was manipulating the block timestamps to be 2-3 seconds apart.  As you can see the difficulty was high and nethash was at 17-18MH/s during the attack.  The point of this attack was to cause difficulty to rise way higher than it should have.  With the timestamps being 3 seconds apart the daemon thinks there is about 700MH/s mining.  This caused difficulty to spike and scared off all the people mining as it was costing way more in power to mine the coin than you would receive in rewards.

  This attack gave the attacker a few days to execute their real attack which was to print 14k blocks worth of rewards.  They then spent the next 2 days roughly mining the coin while not connected to the rest of the daemons.  During this time they changed the coins settings to make it so blocks were only 1 second apart.  They then mined on their own chain printing about 14k blocks using roughly 3-4KH/s of hashrate for most of the blocks. 

height: 78000, timestamp: 1544059736, difficulty: 377488
height: 78001, timestamp: 1544059738, difficulty: 377069
height: 78010, timestamp: 1544059745, difficulty: 373247

  That is 10 blocks mined 9 seconds apart with a nethash of 3.1KH/s.  After mining all these blocks they reconnected to the network and caused a huge reorganization.  To make it so their chain was the main chain they had to make sure total difficulty of their chain was larger than the current main chain.  Since they had stalled the blockchain the miners mostly abandoned the coin leaving roughly 200KH/s on the chain.  So lets say to be safe they rented 300KH/s for 2 days.  At roughly .09BTC/MH/day nicehash price this part of the attack only cost them about 0.05BTC which is about $210.  The timestamp attack went on for a few hours and most likely cost about the same.  So it cost them 0.1BTC to attack the coin and mine 840,00 safex.  Assuming they sell for at least 1000 sats each which is less than the price they are currently selling for the attacker will end up making about 8BTC off of this attack. 
  If Safex continues to use a 720 block difficulty window and stay on the same algorithm as Monero these attacks will likely continue.  Even if they don’t there will still be the cyclical mining where people use nicehash when difficulty is low to mine the easy blocks then stop when difficulty rises and lets the regular miners be stuck mining the higher difficulty blocks.  Then when nethash drops again the nicehashers will come back.

Timestamp Attack: 
Block: 64786 timestamp: 1543718265, difficulty: 2092409798, nethash: 17.44MH
Block: 64787 timestamp: 1543718267, difficulty: 2095121665, nethash: 17.46MH
Block: 64796 timestamp: 1543718291, difficulty: 2189638825, nethash: 18.25MH

  This is a small sample from the timestamp attack.  The attacker was manipulating the block timestamps to be 2-3 seconds apart.  As you can see the difficulty was high and nethash was at 17-18MH/s during the attack.  The point of this attack was to cause difficulty to rise way higher than it should have.  With the timestamps being 3 seconds apart the daemon thinks there is about 700MH/s mining.  This caused difficulty to spike and scared off all the people mining as it was costing way more in power to mine the coin than you would receive in rewards.

  This attack gave the attacker a few days to execute their real attack which was to print 14k blocks worth of rewards.  They then spent the next 2 days roughly mining the coin while not connected to the rest of the daemons.  During this time they changed the coins settings to make it so blocks were only 1 second apart.  They then mined on their own chain printing about 14k blocks using roughly 3-4KH/s of hashrate for most of the blocks. 

height: 78000, timestamp: 1544059736, difficulty: 377488
height: 78001, timestamp: 1544059738, difficulty: 377069
height: 78010, timestamp: 1544059745, difficulty: 373247

  That is 10 blocks mined 9 seconds apart with a nethash of 3.1KH/s.  After mining all these blocks they reconnected to the network and caused a huge reorganization.  To make it so their chain was the main chain they had to make sure total difficulty of their chain was larger than the current main chain.  Since they had stalled the blockchain the miners mostly abandoned the coin leaving roughly 200KH/s on the chain.  So lets say to be safe they rented 300KH/s for 2 days.  At roughly .09BTC/MH/day nicehash price this part of the attack only cost them about 0.05BTC which is about $210.  The timestamp attack went on for a few hours and most likely cost about the same.  So it cost them 0.1BTC to attack the coin and mine 840,00 safex.  Assuming they sell for at least 1000 sats each which is less than the price they are currently selling for the attacker will end up making about 8BTC off of this attack. 
  If Safex continues to use a 720 block difficulty window and stay on the same algorithm as Monero these attacks will likely continue.  Even if they don’t there will still be the cyclical mining where people use nicehash when difficulty is low to mine the easy blocks then stop when difficulty rises and lets the regular miners be stuck mining the higher difficulty blocks.  Then when nethash drops again the nicehashers will come back.