Analyzing Password Characteristics and Strength
Passwords play an increasingly vital role in the modern, Internet-connected world. Particularly with the rise of massive online attacks that specifically target weaknesses in password setting, the study of password characteristics becomes crucial. In this paper we analyse a sample of 880,000 passwords that were released from past hacked databases. Frequency and the type of repeating characters in the passwords were studied, and their entropies were calculated. Based on these results, we conclude with suggestions for choosing stronger passwords.
Index Terms - Password security, strength metrics, password policies, privacy, password entropy, brute force, cyberattacks