Passphrase length and security. Am I reading this right?

[Anthony Papillion]

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So in the course of another discussion on this group, I was told that I
might not actually need my 160+ random character passphrase for good
security. A few URL's were included, including this one
(https://secure.wikimedia.org/wikipedia/en/wiki/Password_strength) on
password strength.

If I'm reading the article correctly, I would really only need a 13 to
16 random character password to achieve the 100+ year protection against
brute force attacks. Is that right? Am I really wasting THAT much effort
or am I reading this wrong?

Thanks,
Anthony
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