The massive data breaches that happened in the last few years have proven beyond doubt that the text password authentication method has many flaws.
Security researchers and companies that are working on alternatives to this flawed system have though of many different schemes: picture and graphics-based passwords,
inkblot-based passwords,
pass-thoughts, and so on. All these approaches are looking for a method for users to created passwords that will be unique and easy to remember for the user, but difficult to guess and/or break for attackers.