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Thursday, Sep 18, 2025

Three random words better than more complex passwords – GCHQ

Three random words better than more complex passwords – GCHQ

The advice comes amid rising cyber crime amid the pandemic.

It is far better to concoct passwords made up of three random words than use more complex variations involving streams of letters, numbers and symbols, Government experts have said.

The National Cyber Security Centre (NCSC), part of Government Communications Headquarters (GCHQ), highlighted its “three random words” recommendation in a new blog post.

It said a key reason for using the system is it creates passwords that are easy to remember yet strong enough to keep online accounts secure from cyber criminals, owing to their unusual combination of letters.

By contrast, more complex passwords can be ineffective because they can be more guessable for criminals and the software they build to detect them, the advice says.

"Traditional password advice telling us to remember multiple complex passwords is simply daft"


The agency says cyber criminals target predictable means supposed to make passwords more complex – like substituting the letter o with a zero, or the number one with an exclamation mark.

Criminals allow for such patterns in their hacking software, which negates any desired added security from such passwords.

“Counter-intuitively, the enforcement of these complexity requirements results in the creation of more predictable passwords,” the agency said.

By contrast, passwords constructed from three random words tended to be longer and harder to predict, and used letter combinations which were more difficult for hacking algorithms to detect.

The blog post concedes the three random words approach was not 100% safe since people might use predictable word combinations, but said a major advantage of the system was its usability “because security that’s not usable doesn’t work”.

Cyber crime has risen dramatically during the pandemic


The guidance comes as cyber crime has soared during the pandemic, with online fraud rising 70% in the last year, according to data from the Office for National Statistics.

“Traditional password advice telling us to remember multiple complex passwords is simply daft,” NCSC technical director Dr Ian Levy says on the centre’s website.

“There are several good reasons why we decided on the three random words approach – not least because they create passwords which are both strong and easier to remember.

“By following this advice, people will be much less vulnerable to cyber criminals and I’d encourage people to think about the passwords they use on their important accounts, and consider a password manager.”

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