If your password is only four or five characters (regardless of whether they are just numbers or a combination of numbers, letters and symbols), there's a very high chance that it will be hacked instantly.
The company said the investigation was still underway, but most affected users should have access to their Twitter accounts now.
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"Today law enforcement has access to more data than ever before in history, so Americans do not have to choose between weakening encryption and solving investigations," Apple said.
"Two-factor authentication is more than needed," a security researcher told Newsweek. "People have to understand that they will not have any privacy with this kind of product."
Netflix recently announced that they intend to limit password sharing, as it costs the streaming platform an estimated $135 million each month.
Hackers could infiltrate a home's Wi-Fi and steal information from computers, researchers claim, but not everyone is convinced it's an issue.
A database of 1.4 billion user passwords compiled from 252 data breaches is suspected to be the largest ever.
Malicious iPhone apps can steal users's personal information through fake login pop-ups.
The brain prefers short, predictable sequences—exactly the opposite of a good password.
Details of up to 412 million people have been exposed following hack of "sex hookup" site Adult Friend Finder.
Telephone and online banking customers will be able to use their accounts using only their voice.
Twitter suspends accounts in response to user account details appearing on the dark web.