Like all the big banks, ANZ Banking Group is experimenting and investing in blockchain technologies, but don't expect it to adopt a public ledger any time soon.

The recent hack of the Decentralised Autonomous Organisation (DAO), a cryptocurrency experiment built on the Ethereum blockchain network that raised more than $US150 million worth of cryptocurrency, served as further proof for the bank that public blockchains were still too risky for adoption, and would likely remain so for the forseeable future.