do you feel secure in your banks 8 digit password
alphabet +10numbers
=2821109907456 combinations to brute
lowercase alphabet+uppercase alphabet+ 28 keyboard symbols + numbers
=1677721600000000 combinations to brute
bitcoin 128bit key
=340282366920938000000000000000000000000 combinations to brute
even if say 10 billion people all tried to bruteforce a 128bit key
=34028236692093800000000000000 combinations to brute per person
which if asking everyone to do 1million brute s second
=34028236692093800000000 seconds
=1079028307080600 years
however 10 billion people all trying to brute a 8 digit password of lower+upper+symb+num
=167772 combinations per person
do you now see why 128bit is still better than what banks usually ask for when making a password to have a bank account
In accordance with the facts. Bank passwords are only allowed 8 characters no more and no less, and of course, most use a combination of birth date or first child's name, or some other combination of numbers and letters.
But some people don't worry about that, but with bitcoin private keys that use 128-bit keys, they still hesitate and feel less secure.
Bitcoin keys use RSA and ECDSA technology which is the most secure key chains today because if you want to brute-force it takes tens or even hundreds of years for ordinary computers, but for Quantum Computers it only takes years. and Quantum computers are also not cheap and not sold commercially.
Then, why are some people still intimidated by 128-bit keys and want more? They may be too paranoid that nothing is safe.
No system is safe, but the main security is the users themselves.
It is the user's job how each password is secured properly and not exposed by others.
One of them is by securing the device used. If the user is careless, then it is not the system that is less secure but the user himself does not maximize it.
