Password Best Practices – How to choose good passwords:
A good password is:
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private: it is used and known by one person only;
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secret: it does not appear in clear text in any file or program or on a piece of paper pinned to the monitor;
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easily remembered: so there is no need to write it down;
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must be at least 8 characters long;
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a mixture of at least 3 of the following: upper case letters, lower case letters, digits and symbols;
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not listed in a dictionary of any major language;
