Bitcoin WikiHacks & losses

Zaif (2018)

Updated 10 October 2026Random article

In plain words

Attackers broke into the Japanese exchange's hot wallets and took 5,966.1 BTC plus BCH and MONA (about ¥7 billion in total).

What happened

Attackers broke into the Japanese exchange's hot wallets and took 5,966.1 BTC plus BCH and MONA (about ¥7 billion in total).

What happened to the coins

Not recovered; the business was transferred to Fisco in Nov 2018.

On the Hacks & losses page

See also

Hardware wallet
A hardware wallet is a small device that keeps your private keys offline and signs transactions inside itself. Even if your computer is infected, the keys never leave the device.
Seed phrase
A seed phrase is a list of 12 or 24 ordinary words that can recreate all the keys of a wallet. Whoever has the words has the bitcoin, so write them on paper or metal and never type them into a website.
Proof of reserves
An exchange's attempt to show it holds the customer coins it owes.
Hot / cold wallet
Hot: keys on an internet-connected device. Cold: keys kept offline.

References

prtimes.jp prtimes.jp
japantimes.co.jp japantimes.co.jp