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Read the hacker's boast and select ALL the grammatically correct ways the journalist could report it the next day.
(Assume the hacker's abilities and the system's security are still true at the time of reporting.)
Direct speech: "I can bypass the firewall, but it will trigger an alarm."
The correct answers are: The hacker claimed that she could bypass the firewall, but it would trigger an alarm. The hacker claimed that she can bypass the firewall, but it will trigger an alarm.
In reported speech, when the original statement is still true or relevant at the time of reporting, backshifting the tenses and modals (changing can to could and will to would) is optional. Both the backshifted and non-backshifted versions are grammatically correct.
"Could have bypassed" and "would have triggered" are perfect modals that completely change the meaning to an unreal, hypothetical past situation.