The best passwords are those that are both easy to remember and hard to crack using a dictionary attack. The best way to create passwords that fulfil both criteria is to use two small unrelated words or phonemes, ideally with upper and lower case characters, a special character, and/or a number. Shouldn’t be used: common names, DOB, spouse, phone numbers, words found in dictionaries or system defaults. Source: ROTHKE, Ben, CISSP CBK Review presentation on domain 1.