How many randomly chosen words are needed to resist a Super Computer?
You could make a password from randomly generated words. Remembering whole words is easier than remembering Complete Passwords. . The user can select the number of words to generate. The number of possibilities is 25,000n where n is the number of words. The number of possibilities that can be checked by a Super Computer is: 3,155,760,000,000,000,000,000 possibilities in one year. So we want n so that: 25,000n =3,155,760,000,000,000,000,000 n= log(3,155,760,000,000,000,000,000)/log(25,000), which is: 4.88844866566902 words. 4 words would resist a Super Compute for about an hour. 5 words would resist a super computer for about 3 years. So the answer is 5 or more words chosen from a 25,000 world list. The above assumes the attacker knows the words in the list. If the attacker did not know them, then it would take considerably longer. The default number of words is 4. This compromises the ease of remembering the words (thus keeping the password in your head) with possible attacks. A single
