Diceware is used to generate cryptographically strong passphrases. It is based on the principle that truly random selection of words from a wordlist, can result in easily memorable passwords that are also extremely resistant to attack. Traditional Diceware uses rolls of physical dice, this application uses a strong random number generator in place of the dice. Passwords that are six words or longer are thought to be safe for very high security applications.
There are words in your password, which is ~ bits of entropy (~12.92 bits/word and ~5.16/symbol).
That many words equates to an effective keyspace of ~ possible keys ((7776^words)/2 which is 50% of the total key space since on average a key will be found in that reduced keyspace). Conservatively assuming an adversary can guess passwords at the rate of a trillion () keys/second, as Edward Snowden claims, an exhaustive brute-force search on half the total keyspace might take:
~ seconds
~ minutes
~ hours
~ days
~ years
~ x avg. lifespan
~ millenia
~ x age Universe
Click on one of the numbered passphrase generator buttons above. Click again to generate a totally new passphrase.
The + Word or + Symbol buttons will enhance the strength of the existing passphrase.
For extra security you can manually roll physical dice (two or five die rolls for each symbol or word respectively) and enter the results to add a word to your passphrase.
Each word or symbol displayed is shown with the index number that was used to look it up in the diceware word list.
You can copy the generated passphrase from the copyable string on the page. You should store it somewhere safe and secure. You might want to write it down and refer to the written version until you can remember it.
Close your browser window once you're done so others can't discover your passphrase.