4 ms·But someone else can just overwrite it anytime without you realising?by jonplackett 7y agoBut someone else can just overwrite it anytime without you realising?cyborgx7 7y agoCorrect.vcavallo 7y agouse an unguessable string as your key. make it as safe as a password and it might as well be one.Nax__ 7y agoIt depends. Unless the author took preventive measures to prevent this, key lookups tend to be vulnerable to timing attacks, for example.