zakiakhmad writes: "Hi! I am trying to do research on several authentication methods, such as: Token, PKI(Public Key Infrastructure), Biometrics, RFID (Radio Frequency Identification) etc. I need to know the correlation between the authentication method with the maturity level for each authentication method. To be precise, I need to know the state of each authentication method: How do the market response? Any data will be very helpful. Thank you for your attention. Zaki Akhmad"