3 ms·
>fairly long passwords how long are we talking?
by grwgreg 5y ago
>fairly long passwords
how long are we talking?
- foxyv 5y agoI never really did the math before but I whacked something together real quick in Excel. At $0.30/THash BTC we can come up with some cost expectations for password lengths. Here I will use a 74 possible character password using 26 upper and lower case letters, 10 numbers and 12 symbols. Totally random of course. Using (Possible Chars ^ Password Length) as the number of combinations and guessing we will find our answer at about %50 of our guesses. (See! Super rough) With SHA-256 it takes about $21 to crack a 6 character password. $1500 to crack 7 characters. $108,330 to crack 8 characters. $7.8 million to crack 9 characters. $561 million to crack 10 characters. $40 billion to crack 11 characters. $3 trillion to crack 12 characters. $200 trillion to crack 13 characters. Edit Note: BTC is kinda expensive per hash right now. Usually this would all be cheaper. Past 14 characters it could be 1 cent and still outrun the usual US budget for a couple years.