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  #1  
Alt 04.06.2018, 15:00
Inad - ait Kullanıcı Resmi (Avatar)
 
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Standart #ZenCash blockchain were been hacked

https://twitter.com/btcfrm/status/1003612215537172482

The ZenCash network was the target of a 51% attack on 2 June at approximately 10:43 pm EDT (03 June 02:43 hrs UTC). The ZenCash team immediately executed mitigation procedures to significantly increase the difficulty of future attacks on the network.
Sequence of events:

Received warning of potential attack from one of our pool operators
Immediately initiated investigation and evaluated hash power distribution
In parallel, contacted exchanges to increase confirmation times
Investigation showed that the suspect transaction was a double spend
In progress: Additional forensics and jointly investigating with the affected exchange
A 51% attack or double spend is a major risk for all distributed, public blockchains. All Equihash-based networks are exposed to an influx of new Equihash power and therefore the best short-term mitigation strategy is to recommend that all exchanges increase their minimum required confirmations to at least 100.

WHAT WE KNOW SO FAR
At the time of the attack the Zen network hash rate was 58MSol/s. It is possible that the attacker has a private mining operation large enough to conduct the attack and/or supplement with rental hash power. Net hash rate is derived from the last mined block and therefore live hash rate statistics are not available.

The suspect pool address is znkMXdwwxvPp9jNoSjukAbBHjCShQ8ZaLib. Between blocks 318165 and 318275, the attacker(s) caused multiple reorganizations of the blockchain, reverting 38 blocks in the longest reorganization. In block 318204 and 318234 the attacker(s) performed double-spend attacks.

1st Double Spend – 6,600 ZEN

Orphaned transaction
https://explorer.zensystem.io/tx/574...af621d5b8f4f84
In orphaned block
https://explorer.zensystem.io/block/...9b14e811d243f3
Double-spend transaction
https://explorer.zensystem.io/tx/60b...4c2ea6d2274003
Included in attacker block
https://explorer.zensystem.io/block/...be0420af8397d9

2nd Double Spend – 13,000 ZEN

Orphaned transaction
https://explorer.zensystem.io/tx/1fd...94a56e5ea618cf
In orphaned block
https://explorer.zensystem.io/block/...db1aefa723f62c
Double-spend transaction
https://explorer.zensystem.io/tx/17c...1786b91c8dfa46
Included in attacker block https://explorer.zensystem.io/block/...e55c42df2a3b28

The suspect exchange deposit address is zneDDN3aNebJUnAJ9DoQFys7ZuCKBNRQ115

“IS MY MONEY SAFE?”
Increasing required confirmations to 100 makes another attack highly unlikely, however, if you have any specific concerns about the general security of exchange platforms, please contact the exchange directly. As always, we recommend that users store their funds in wallets that they control such as cold storage with something like a Ledger Nano S or paper wallet.

The Zen team will continue monitoring the network and conducting forensic analysis with the affected exchange. All information gathered will be provided to the appropriate authorities.

ZenCash remains committed to ensuring the security of its customers’ funds and recommends that our users contact exchanges directly with any specific security-related questions. ZenCash also remains committed to providing timely customer service to our community and will provide regular updates on the situation as it develops.

@husta5 what you think ? Buying Zen is safe or not ?
its will go up or not ?

Source; https://blog.zencash.com/zencash-sta...-spend-attack/
husta5, lucian ve Hakkiboy bunu beğendiler.
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Konu Inad tarafından (04.06.2018 Saat 15:25 ) değiştirilmiştir.
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  #2  
Alt 04.06.2018, 16:39
 
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Standart Cevap: #ZenCash blockchain were been hacked

Alıntı:
Inadmissible Nickli Üyeden Alıntı Mesajı göster
https://twitter.com/btcfrm/status/1003612215537172482

The ZenCash network was the target of a 51% attack on 2 June at approximately 10:43 pm EDT (03 June 02:43 hrs UTC). The ZenCash team immediately executed mitigation procedures to significantly increase the difficulty of future attacks on the network.

....
....

“IS MY MONEY SAFE?”
Increasing required confirmations to 100 makes another attack highly unlikely, however, if you have any specific concerns about the general security of exchange platforms, please contact the exchange directly. As always, we recommend that users store their funds in wallets that they control such as cold storage with something like a Ledger Nano S or paper wallet.

The Zen team will continue monitoring the network and conducting forensic analysis with the affected exchange. All information gathered will be provided to the appropriate authorities.

ZenCash remains committed to ensuring the security of its customers’ funds and recommends that our users contact exchanges directly with any specific security-related questions. ZenCash also remains committed to providing timely customer service to our community and will provide regular updates on the situation as it develops.

@husta5 what you think ? Buying Zen is safe or not ?
its will go up or not ?

Source; https://blog.zencash.com/zencash-sta...-spend-attack/
Well it's not something i can currently comment about. I got to see the results of the measures taken by ZenCash team. Before that, anything would be a speculation. In possible %51 attacks you need to provide more than the double of the GHS mining power hashrate at the related network.
About a week back; ZenCash network had 59 MH Equihash mining hashrate in total. So you needed almost 62,5 MH to make the %51 attack. And that costs only 7180$ to make the attack on the mining pool; for getting all the block rewards for an hour , with the Msol rental for an hour from NiceHash.
In time different coin networks' pools get attacked and mining those coins becomes much much worthy and the value of those coins rise.

About the double spending issue of the attackers in the coin network; this does not effect the coin traders so much, incooperation with the exchanges network finds out the attacking wallet addresses and solves the problem.
For now value of ZEN being %5,5 lower on ZEN/BTC might be a good buying price. It's up to you to decide.
For P2P transfers i do not advise to use ZEN for a week until the dust settles down. Cause the exchanges will keep the confirmations high and P2P transfers will be like hell of a waiting.

Konu husta5 tarafından (04.06.2018 Saat 16:50 ) değiştirilmiştir.
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  #3  
Alt 04.06.2018, 17:49
Inad - ait Kullanıcı Resmi (Avatar)
 
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Standart Cevap: #ZenCash blockchain were been hacked

Alıntı:
husta5 Nickli Üyeden Alıntı Mesajı göster
Well it's not something i can currently comment about. I got to see the results of the measures taken by ZenCash team. Before that, anything would be a speculation. In possible %51 attacks you need to provide more than the double of the GHS mining power hashrate at the related network.
About a week back; ZenCash network had 59 MH Equihash mining hashrate in total. So you needed almost 62,5 MH to make the %51 attack. And that costs only 7180$ to make the attack on the mining pool; for getting all the block rewards for an hour , with the Msol rental for an hour from NiceHash.
In time different coin networks' pools get attacked and mining those coins becomes much much worthy and the value of those coins rise.

About the double spending issue of the attackers in the coin network; this does not effect the coin traders so much, incooperation with the exchanges network finds out the attacking wallet addresses and solves the problem.
For now value of ZEN being %5,5 lower on ZEN/BTC might be a good buying price. It's up to you to decide.
For P2P transfers i do not advise to use ZEN for a week until the dust settles down. Cause the exchanges will keep the confirmations high and P2P transfers will be like hell of a waiting.
Thank you, for your comment.I already bought some Zen/BTC.I think the price is good for buying.I will sell off short-term.And Zen is an end-to-end encryption system with zero technology knowledge where communications, data, or values can be sent and stored securely. This is an integration of the technological revolution that creates an end system where innovation can be accelerated by a combination of three traditionally performed separately:

1) transaction
2) communication, and
3) competitive governance.

This is done in a security and an anonymous way, using
a worldwide distribution of block chains and computer infrastructure.
The system is integrated with the best forms of technology in which a
transparency for unlicensed innovations that can develop with
user desires.
husta5 bunu beğendi.
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