• Facebook is the most vulnerable big technology firm when it comes to facing disruption, Rebeca Hwang, co-founder and managing director of Rivet Ventures, tells CNBC at Davos.
• Hwang also says large technology firms could be challenged by start-ups.
• Phil Chen, managing director at venture firm Presence Capital and decentralized chief officer at HTC, says blockchain technology could take some power away from big tech firms.

Arjun Kharpal
@ArjunKharpal



Marlene Awaad | Bloomberg | Getty Images

Mark Zuckerberg, chief executive officer and founder of Facebook Inc., listens during the Viva Technology conference in Paris, France, on Thursday, May 24, 2018.

Facebook is the most vulnerable large technology company when it comes to facing disruption, a prominent venture capitalist told CNBC on Tuesday, amid ongoing concerns around privacy.

The social media giant had a rough 2018. It kicked off after revelations that the data of 87 million Facebook users had been harvested by a political consultancy that ended up working with President Donald Trump's campaign.

Then came reports about Russian-backed attempts to influence American elections and news that 50 million Facebook accounts were compromised in a cyberattack, in addition to the resignation of Instagram's founders.

Rebeca Hwang, co-founder and managing director of Rivet Ventures, said backlash from users toward social media firms has left Facebook is a tough place.

"I do think Facebook is in a very vulnerable place right now. Both seen from the perspective of the consumer reaction … but also from the perspective of the deal flow that I see and the types of companies that are trying to become the disruptors of a Facebook," Hwang said during a CNBC-hosted panel at the Davos Sanctuary.

"In my opinion, they have to take very strong actions to maintain their position."Facebook was not immediately available for comment when contacted by CNBC.

Part of the discussion on the panel focused on the power of the world's largest technology firms and whether they are too powerful to face disruption. Hwang said that the heightened sensitivity among consumers toward data privacy could provide an opportunity for start-ups.

"I think the ones that have become dominant, especially with younger generations, it's also very challenging having that status. And so I don't necessarily see a future where all of these giants will continue dominating forever.

I think there will be disruptors in some of these areas by new players," Hwang told CNBC.

Blockchain disruption?

Phil Chen, managing director at venture firm Presence Capital and decentralized chief officer at HTC, said blockchain technology could take some power away from big tech firms.

Blockchain is the technology that underpins the cryptocurrency bitcoin. It is a public ledger of transactions in bitcoin that is decentralized, meaning it is not owned by any one person.

 Instead, it is maintained by many participants.Chen argues that companies like Facebook hold data on users in a central database that is owned by the company.

But blockchain technology could decentralize databases, allowing users to own their own data, and taking the power away from large companies."That's the hope, that's the thesis. At the end of the day today, the big corporates, they have big central servers that hold everybody's data.

I think what bitcoin and blockchain really allows … is empowering people to own their own keys," Chen told CNBC.

A key is a unique cryptographic address that allows someone to own their own cryptocurrency. Chen argues that this unique key could also allow users to own their own data.

"Once you start owning your own keys, which is the means in which you own the cryptocurrency, then you start owning your identity, then you start owning your data, and that needs the whole crowd and the people to participate," Chen said.

WATCH: Why Facebook's business model is only now coming under fire