Google is working on blockchain-related technology to support its cloud business and head off competition from emerging startups that use the heavily-hyped technology to operate online in new ways, according to people familiar with the situation.

Companies use blockchain and other so-called digital ledgers to securely record transactions and process other data over the internet -- a service Google could use, for example, to reassure customers that their information is protected when stored on the giant network of computer servers that power its cloud services.