HI guys
I am seeing too many horror posts regarding BTC being stolen so I am going to protect my coins by a passphrase.
Would 6 names of family members would be secure enough? Because I prefer my passphrase to be memorized.
I realize that 6 names of family members isn't as secure as completely random words but not having to write anything down or store anything has many security benefits too.
My keys are safely stored offline already.
It was safer before you asked.
Now that you've told the entire world that you plan to use "6 names of family members", an attacker can just take the time to learn who all of your family are and then use that information to take your bitcoins.
Would 6 random names be safe enough as passhprase against brute force attacks if my private key is known?
NO.
A password is useless once your private key is known. A password is to keep someone from gaining access to your private keys.
If you do not have exclusive access to your private keys, then you do not exclusively control your bitcoins.