This Thursday, the billion-dollar company Google filed a patent application for a blockchain platform that will be used for authentication and securing account data.

Google has been actively pursuing blockchain to complement its cloud service, and aside from technological developments in this area, Google also acquired and invested heavily in start-ups involved with blockchain.

The company, which initially began as a search engine, is preparing to employ blockchain to record signatures and validate the information stored in their database and know when and if it was modified. For this, the company will be developing a “tamper-evident” log.

“Like many new technologies, we have individuals in various teams exploring potential uses of blockchain but it’s way too early for us to speculate about any possible uses or plans,” said a Google spokesperson to Bloomberg.

The filing also reveals that Google will develop two blockchains. One blockchain will consist of “first signatures” which will be recorded on the ledger, and the second blockchain will retain the data which was first validated by the signature.

“The method includes adding a new block to the target blockchain by linking the new block to both the existing block and the block of the second blockchain that is identified by generating a signature for the new block that is based on the first signature and the second signature, and associating the signature with the new block. The target blockchain and the second blockchain may be part of a block lattice,” read the filing.

Last week, Google made the announcement that it was banning all cryptocurrency-related advertisements on its platform, since they are often linked to fraudulent schemes.

But in spite of this decision, the company still has faith in the potential of the technology behind cryptocurrencies seeing as Google’s advertising leader, Ridhar Ramaswamy, stated on Wednesday that the company was still working on how to incorporate blockchain technology into their current systems.