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The Australian Cyber Security Centre (ACSC) is aware of a significant data breach affecting 773 million email addresses and usernames.

Alert status

Titled 'Collection #1', the data breach was made public by Australian cyber security expert Troy Hunt, who identified that a large number of credential lists had been distributed on a known hacking forum.

The list included combinations of usernames, hashed and plaintext passwords.

This data breach may involve credentials for multiple users of businesses websites/services.