According to foreign media reports, the digital cryptocurrency platform poly network suffered a major hacker attack this month, and hackers stole digital cryptocurrency assets worth more than $600 million. Strangely, the hacker then returned almost all the stolen digital assets, but more than $200 million of them were locked in an account that required the hacker to provide a password. Now, the hacker finally provided access to poly network, that is, the hacker returned the last part of the stolen digital assets p> < p > < / P > < p > the hacker attack on poly network this month is the largest digital asset theft in the history of digital cryptocurrency. In this theft, the hacker took advantage of a vulnerability in the poly network platform code to steal digital tokens worth more than $600 million, and these digital assets were transferred to the hacker's own account p> < p > strangely, not a single poly network hacker ran away. Instead, they engaged in dialogue with the target institutions of the victims and promised to return all these stolen assets. Sure enough, hackers returned almost all of these assets last week, except for tether's $33 million TEDA coins linked to the US dollar. The reason why this part of TEDA coins has not been returned is that the issuer has frozen this part of assets p> < p > however, more than $200 million of these assets are locked in an account that requires passwords from both poly network and hackers to access and open. In the past few days, hackers have refused to provide their passwords, claiming that they will provide them only when "everyone is ready" p> < p > poly network asked the hacker to return the remaining assets, and the platform promised to reward the unidentified hacker $500000 to help identify defects in the platform system. In addition, poly network even promised to provide the hacker with the position of "chief security adviser" of its platform p> < p > now, the hacker has finally given poly network access to the last part of the stolen assets. A blog post released by poly network on Monday local time said that Mr. White hat provided the necessary password to enable the company to retrieve this part of the stolen assets. Poly network called the hacker Mr. White Hart p> < p > "so far, all user assets transferred during this event have been fully recovered." Poly network said, "we are returning all asset control to users as soon as possible." p> < p > this is one of the strangest stories in the field of digital cryptocurrency recently. The theft is considered to be the largest digital asset theft in the history of the field. In 2018, coincheck, Japan's digital cryptocurrency exchange, was stolen $534.8 million of digital assets due to hacker attacks. In 2014, Mt. GOx, the digital cryptocurrency exchange in Tokyo, was robbed of bitcoin assets worth $450 million p> < p > last week, liquid, a Japanese digital cryptocurrency trading platform, said that it was attacked by a network and hackers stole digital token assets allegedly worth US $97 million p> < p > different from the previous theft, the attacker maintained an open dialogue with the victim in this theft on the poly network platform, and the victim finally recovered the stolen assets. Security experts said that attackers are likely to realize that these stolen assets are difficult to be laundered and cashed because all transactions are recorded on the blockchain p> < p > "my behavior may be considered strange. This is my personal effort to contribute to the security of the poly network project." The hacker who claimed to be carrying out the attack said, "consensus is expressed in a painful and vague way, but it works. However, some people even suspect that the whole story is a public relations gimmick. " p> < p > poly network said that its team confirmed that the password provided by the hacker was "true" p> < p > "so far, poly network has regained control of US $610 million (excluding the frozen US $33 million TEDA dollars). Once again, we would like to thank Mr. White Hart for his commitment, as well as the community, partners and multiple security agencies for their help. "( Tianmen Mountain) < / P > < p >