Bitcoin Classic Targeted by DDoS Attacks

F2Pool, a Chinese mining pool also referred to as Discus Fish, which holds the largest share of the Bitcoin network’s hashrate at 26%, has been experiencing a series of extreme DDoS attacks. Behind the DDoS attack. The attacks began to target the F2Pool Bitcoin mining pool almost immediately after the F2Pool team announced their decision to “test” Bitcoin Classic by launching a subpool in which miners can mine Bitcoin Classic blocks. Peter Todd and other Bitcoin experts requested the hackers and the individuals behind the series of DDoS attacks to terminate them immediately, as they are....

A number of privacy-oriented email service providers have been targeted by distributed denial-of-service (DDoS) extortionists demanding payment in bitcoin. Hushmail, ProtonMail and Runbox, among other services, were targeted by an entity calling itself the Armada Collective. The group was the subject of a warning from earlier this fall by the Swiss Governmental Computer Emergency Response Team, a national agency dedicated to cybersecurity issues. Blog posts from the email providers indicate that the attacks took place between 3rd and 6th November. In the case of ProtonMail, the service....

AntPool, BW.com, NiceHash, CKPool and GHash.io are among a number of bitcoin mining pools and operations that have been hit by distributed denial-of-service (DDOS) attacks in recent days. The incidents appear to have begun in the first week of March. For example, on 11th March, AntPool owner Bitmain sent an email to customers disclosing the DDOS attacks and advising external pool users to set up failsafe pools in the event of an outage. According to many of the companies affected by the incidents, those behind the attacks demanded payment in bitcoin in return for stopping the attacks.....

Cryptsy, a Belize-based cryptocurrency and bitcoin derivatives exchange has been suffering from a series of extreme denial of service (DDoS) attacks, that have effectively disabled the site and bitcoin wallets since November 22. "Due to a server failure all wallets are paused. Will have them back online as quickly as possible. Website offline due to denial of service attack. We are working to mitigate," announced the Cryptsy team. Over the past few weeks, prominent bitcoin exchanges and payment processing platform including Kraken and OKCoin have been targeted with DDoS attacks of similar....

Encrypted email service provider ProtonMail recently and grudgingly gave in to a ransom demand of 15 bitcoin (approx $6000) to attackers who targeted the service with destructive Distributed Denial of Service (DDoS) attacks. ProtonMail, an encrypted email service set up by CERN scientists in Geneva and researchers at MIT, has revealed crippling DDoS attacks to be the cause of a recent outage suffered by the crypto e-mail service provider. Two groups are believed to be behind the attacks, one of which began the cyber-strikes and put forth the ransom demand. The website remains down at the....