Those humans, in turn, are social creatures who are not above being fooled. "There's no way for us to know".
She said the latest incident highlighted the need for all major social media platforms to check their security measures, particularly in the run up to the United States presidential vote in November.
Sen. Ron Wyden, D-Ore., a prominent figure in internet legislation for more than two decades, warned that the hack could have serious, wide-ranging effects if the intruders were able to get access to direct messages of politicians and other high-profile public figures.
The path to the hack is still somewhat subject to conjecture, but one thing is clear: A Twitter employee was involved, directly or indirectly.
Mass compromises of Twitter accounts via theft of employee credentials or problems with third-party applications that many users employ have occurred before.
Dorsey's assurances did not assuage Washington's concerns about social media companies, whose policies have come under scrutiny by critics on both the left and the right. The platform's short, rapid-fire messages ricochet around the world in seconds in today's public square. At the moment, the accounts seem to have been compromised as a way to perpetuate cryptocurrency fraud. This technique is known in cryptocurrency scams.
United States to hit Huawei employees with visa bans for rights abuses
Trump has also loudly blamed China for COVID-19, news of which was suppressed when cases first emerged in Wuhan late past year . China has hit out at the UK's decision to strip Huawei equipment from its 5G network , urging a "public and painful" revenge.
In yesterday's massive attack on Twitter, some of the maximum-profile accounts on the service, together with President Barack Obama, Joe Biden, Elon Musk, and Monthly bill Gates experienced their accounts hijacked to peddle bitcoin scams.
The hackers are thought to have made more than $100,000 in the space of just 10 minutes.
Twitter soon locked down many accounts, including those of its "verified" users with blue check marks next to their names - a group that include many US politicians as well as businesses, celebrities, journalists and news organizations.
"We detected what we believe to be a coordinated social engineering attack by people who successfully targeted some of our employees with access to internal systems and tools", the company said in a series of tweets.
Broader questions have already been raised about when Twitter, Facebook or other social media platforms should or should not censor content. Facebook was heavily criticised for not removing oppressive posts about Rohingya Muslims in Myanmar, and what the United Nations referred to as a genocide ensued. But security expert Bruce Schneier points out that there is always a human somewhere with a hand on the lever: "Systems need trusted people to operate".
"It's hard to predict and mitigate how people will factor into potential breaches, but this should nonetheless be a learning experience for other platforms and tech companies to encourage them to review and enforce an effective incident response plan moving forward", Kelvin Coleman, executive director at National Cybersecurity Alliance, said in an emailed statement. "I think it would be highly likely that a number of credentials have been stolen by the attackers and we could see more accounts and sensitive information being leaked in the coming weeks", Dan Panesar, director of United Kingdom and Ireland at security information and event management firm Securonix Inc. It could have been.