On January 2, LukeDashjr, the core developer of Bitcoin, tweeted an article about PGP key leakage, which resulted in the theft of more than 200 bitcoins, about 3.5 million dollars. Zhao Changpeng, CEO of currency security, subsequently responded on Twitter that there are risks in self trust, and the currency security team has monitored and provided assistance as much as possible. The currency chain of the smart contract platform was attacked by hackers, who stole 2 million currencies within 2 hours.

BNBChain was attacked by hackers with a total amount of 700 million dollars, including 570 million dollars of BNB. According to Zhao Changpeng, founder of monetary security, this shocked the entire industry. The main reason for the "attack" is a vulnerability in the cross link "Token Hub".

The hackers obtained 2 million pieces from the two system contracts (2:26) and 4:43) of the "Token Hub" of BNBChain. BNB。 In addition, 900000 BNBs were loaned the agreed Venus mortgage loan on BNBChain, with a loan of 62.5 million BUSD5 million USD and 35 million USD DC. In addition, according to the social media account CIAOfficer, according to independent analysts, there are currently 1.04 million hacker attacks. BNB is worth US $389 million venusBNB and US $28 million BUSD, totaling US $718 million. This number is the largest chain attack in history.

BNBChain tweeted that due to abnormal activity, it is currently under maintenance, and all activities are suspended for a period of time. Before BNB further updates, the deposit and withdrawal of the chain. "After identifying potential vulnerabilities, we suspended BNBChain. Now all systems are under control, and we are investigating potential vulnerabilities. We know that the common understanding helps to freeze any transfer.".

Another BNBChain tweet shows that the funds withdrawn are about 70 million to 80 million dollars, and 7 million dollars have been frozen. It is reported that the hacker attack resulted in 2 million pieces. About $718 million of BNB's assets were stolen.

Later, Zhao Changpeng, CEO of Yuan'an, said on the social platform that the current loss was estimated to be 100 million dollars (about 710 million yuan). Monetary security has suspended the recharge and withdrawal of investors. "At present, this problem has been controlled, and the customer's funds are safe. We apologize for the inconvenience to investors, and will provide further system updates in the future." In the morning of the theft, Zhao Changpeng wrote that the cross chain bridge of the currency security chain was attacked, leading to the theft of the currency security. The currency security requires all verifiers to suspend use, and the problem is now under control. At the same time, he also said that a vulnerability in the "TokenHub" of BNBChain cross chain bridge led to an additional vulnerability BNB, and all verifiers were required to temporarily temporarily BNBChain. Now, this problem has been controlled, and the funds are safe, so further updates will be provided accordingly.

It is understood that the currency security chain was launched in September 2020 to provide an alternative intelligent contract platform for the increasingly expensive Ethereum main network. It is an independent blockchain, which adopts the consensus mechanism of proof of equity. It is also compatible with Ethereum Virtual Machines. Coincidentally, in August 2019, it was revealed that the currency security incident was threatened by hackers and 30 Bitcoins were blackmailed; In July 2019, the monetary security account assets disappeared; In May 2019, currency security was attacked by hackers and 7000 bitcoins were transferred; In July 2018, tens of thousands of bitcoins were stolen.

The whole digital currency exchange industry has some security problems, among which the most serious case is the largest digital currency exchange in 2014. MtGox stole 850000 Bitcoins and finally declared bankruptcy. Since then, there have been 4-5 major exchange thefts every year. The loss of the hacker incident exceeded that of the last hacker incident.

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The loss of the hacker incident exceeded that of the last hacker incident. Ronin Network is worth 620 million US dollars, which is the highest amount of black gold so far. The hacker in this case used it as early as October 6. The ChangeNOW service transfers the initial attack funds (more than 100 BNBs) to the BSC in the chain. The hacker then registers 1006 by calling the system RelayerHub contract 0x, and then registers the system. CrossChain contract 0x2000 attacks.