Office business systems ask me to change my password every three months. with a blackmail of

"if not, your accounts will be deleted"

Correctly, the systems say just "your password will be expired soon", however this is the same story.

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On the other hand, this annoying and tired operation to change password, is likely to be more effective.

After my Twitter account was hijacked, I cleaned up my act of "any password will come to light".

As a matter of fact, with current computer performance, It is true that "a password of about one phrase can be torn by force".

However, because that 'forceful' takes time, so the strategy of changing passwords every three months is reasonable price at the cost of "annoying and tired operation".

(To be continued)