The Hong Kong Stock Exchange has resumed its work a week after unknown hackers took hold of its digital keys and stole 119,756 BTC.

From today, customers can make deposits, withdraw funds and trade all currency pairs that were traded on the exchange before the hack. Bitfinex no longer supports deposit addresses created before the shutdown and warns traders not to use them anymore.

“We have added additional platform and infrastructure security checks; regenerated all encrypted services, including wallets, security tokens and passwords; moved funds to multisig cold storage; re-evaluated all third-party integrations; performed a comprehensive system audit in order to identify vulnerabilities; and, rebuilt our entire platform on new infrastructure,” specified Zane Tackett, a public speaker for Bitfinex.

Following the announce of Bitfinex reopening, he promised that those who provide helpful information about the fate of stolen bitcoins will be rewarded.

“[Five percent] of recovery and for information leading to recovery (but no bounty if no recovery); if multiple persons lead to recovery, share pro rata.”

If all the stolen bitcoins are found, the informant will receive 6,000 of BTC, which will amount to more than $ 3.5 million at the current exchange rate.

Redditors doubt that it is possible to locate the hacker in the first place unless they are handed out or surrender themselves because to return the bitcoins investigators need much more than just a name.

The so-called BFX tokens issued to record each customer’s discrete losses are traded on the exchange along with fiat and cryptocurrencies.

“Tokens will be distributed without release or waiver. The BFX tokens will remain outstanding until redeemed in full by Bitfinex or possibly exchanged—upon the creditor’s request and Bitfinex’s acceptance—for shares of iFinex Inc,” explained Zane Tackett three days before.

The tokens cost $0.10 at the start of the day and have grown to $0.40, to much surprise of some market players.

“Bitfinex has been handling things well after the hack, but I'm amazed ppl are going back to trading before we know root cause of the hack,” an entrepreneur Samson Mow wrote on his Twitter.

To be able to log in after the recovery, the exchange users must reset their passwords. Those Bitfinex clients who used two-factor password-free authentication will need to register anew. All previous API keys have been annulled too.

The loss from the cyberattack that took place on 2 August was evenly distributed among all Bitfinex users. The generalised loss percentage was estimated at 36.067%.

Lyudmila Brus