An action taken to prevent or combat something harmful or negative, especially in response to an attack or threat.
From counter- (opposite, against) + measure (a way of judging or determining something). Counter comes from Latin contra, while measure comes from Latin mensura meaning 'to measure.'
In cybersecurity, countermeasures are constantly being invented as hackers create new attacks—it's like a never-ending game of strategic chess between good and evil.
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