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Learn how password strength is measured by entropy, which is the minimum number of bits needed to hold the information in a password. Find out how password guessing and cracking work, and how to improve password security with salts and key stretching.
A passphrase is a sequence of words or other text used to control access to a computer system, program or data. Learn how to choose a strong passphrase, how it differs from a password, and how it is used in cryptography.
A rainbow table is a data structure that can recover plaintext passwords from hash values, using a space–time tradeoff. Learn how rainbow tables work, their history, and their advantages and limitations.
Learn why password security is important and what mistakes to avoid when creating or changing passwords. Find out how AOL can help you with password management and identity protection services.
A strong password is your first line of defense against intruders and imposters. Here are some helpful tips on creating a secure password so you can make sure your information remains safe. Create a strong password • Use unique words - Don't use obvious words like "password". • Have 12 or more characters - Longer passwords are more secure.
Learn how to create and change passwords that are strong, unique and secure. AOL offers tools and advice to help you protect your online accounts and data from hackers.
Salt is random data added to a password or passphrase before hashing it, to prevent attacks using precomputed tables or multiple occurrences of the same password. Learn how salt works, its benefits, common mistakes and examples.
This web page shows the most common passwords discovered in various data breaches, including "qazwsx" as the 23rd most common password in 2016. It also provides the sources and rankings of the password lists by NordPass, SplashData and Keeper.