Quote from: PainKiller1986 on April 05, 2018, 06:57:30 PM

Quote from: Krakatoa87 on April 05, 2018, 04:33:21 PM

Quote from: sud on April 02, 2018, 06:37:05 AM

Electroneum is probably under a 51% attack right now. Someone may be trying to double spend. Avoid making transactions.

https://www.reddit.com/r/Electroneum/comments/88wbkv/electroneum_is_probably_under_a_51_attack_right/

I've read the entire reddit thread and some others on this subject. All I can say is that there's nothing new at all, all this things are happening since mid-january, as a (small) pool owner I've noticed it soon and posted it, but nobody cared...

Quote from: xzentorxz on January 23, 2018, 08:27:37 PM

Quote from: Krakatoa87 on January 23, 2018, 05:41:53 PM

Hello, I have 2 important questions that should concern every ETN miners and users, and I hope I will have answers!

1/ Where the hell are more than half of the network hashrate? If it's in only one place, it should be a big concern for everybody (especially regarding question 2).

2/ How is it possible that some blocks appears to be mined many minutes before other blocks that have a lower high.

For example: block 124870 https://blockexplorer.electroneum.com/block/b8869738a22d0dc1c7ec0dfbf70ba3e2e08fc0fe9b952d98f851549fc1564012 was mined 40 minutes before block 124869 https://blockexplorer.electroneum.com/block/e5cac39f32ac6178addc758af4e0250dec28d674251f1925d7af4f3bbd3fcba5 which should not be possible. In fact, it appears that block 124870 was mined directly after block 124840 https://blockexplorer.electroneum.com/block/b480c6221526c210510b076124bde7463a743b5a2356666db03e48cc68cc91eb
This phenomenon has been occurring several times a day for the past few days.

It's very worrying.

1/ https://etn.nanopool.org/ + https://etn.spacepools.org/ > 50%

2/ A block can only be added at the end of the blockchain, so they are always mined in order, that means the dates are simply wrong. A blockchain has no time consensus, so the dates dont need to be accurate, the only "time consensus" a blockchain has is the heigt. Thats why updates will be released at a block height X and not at a time X. Im not sure how they measure the timestamp on a transaction but i asume the miner just puts his server timestamp in, which dont has to be accurate at all.

I assume you thinking about 51% attacks. With those attacks you can replace the block by mining with more then 50% hashrate, but you keep them secret. So you wouldnt see the increased difficulty anyway ,because the solved blocks would not be released to the global blockchain. After time X you will always have the longer blockchain (because you solved more blocks) wich is accepted by the global blockchain, so you would just suddenly see the end of the blockchain removed and replaced with something else. But even these added blocks will be in chronological order.

So lets say a big company which owns a lot of hashing power makes a deal with nanopool (or they get hacked by the company). You would first see a huge decrease in difficulty, because nanopool would be not releasing their blocks, but they could keep the miners in the dark about it, give them all the money they want, because its gona be reversed anyway. Then they make their scam deals and release the longer blockchain, which would be accepted globaly. Not to easy but since their is a lot of centralization with ETN mining (most of it because of lack of knowlege) it is not impossible. In the beginning of ETN mining one pool even had 97% of the hashing power.

TL;DR The timestamp is not reliable, only the block height is and its impossible to add blocks inbetween

1/ Well most of the time it is barely >50% or <50%

2/Ok that make sense. But what I also find disturbing is, from what I saw, these blocks with a wrong timestamp never have any user's transaction in them...

Small pool? probably is one of the biggest or the big one

I'm talking about my pool: http://electroneum.ovh/ -_-

Quote from: sud on April 05, 2018, 06:32:41 PM

@Krakatoa87 Thanks for this info!

So what why do you think all those empty blocks with wrong timestamp are generated? Also when it happened, I couldn't sync with blockchain because I was getting new top block candidates all the time, now it's over.

I don't know why, that's why I posted here in the first place!
For sure something isn't normal, but it isn't recent, it's been like this for the past few months.