128 bits to realize the MePKC (Memorizable Public-Key Cryptography) using fully memorizable private key upon the current private key management technologies like encrypted private key, split private key, and roaming private key. Cognitive passwords use question and answer cue/response pairs to verify identity. "The password is dead" "The password is dead" is a recurring idea in computer security. The reasons given often include reference to the usability as well as security problems of passwords. It often accompanies arguments that the replacement of passwords by a more secure means of authentication is both necessary and imminent. This claim has been made by numerous people at least since 2004. Alternatives to passwords include biometrics, two-factor authentication or single sign-on, Microsoft's Cardspace, the Higgins project, the Liberty Alliance, NSTIC, the FIDO Alliance and various Identity 2.0 proposals. However, in spite of these predictions and efforts to replace them passwords are still the dominant form of authentication on the web. In "The Persistence of Passwords," Cormac Herley and Paul van Oorschot suggest that every effort should be made to end the "spectacularly incorrect assumption" that passwords are dead. They argue that "no other single technology matches their combination of cost, immediacy and convenience" and that "passwords are themselves the best fit for many of the scenarios in which they are currently used." Following this, Bonneau et al. systematically compared web passwords to 35 competing authentication schemes in terms of their usability, deployability, and security. Their analysis shows that most schemes do better than passwords on security, some schemes do better and some worse with respect to usability, while every scheme does worse than passwords on deployability. The authors conclude with the following observation: "Marginal gains are often not sufficient to reach the activation energy necessary to overcome significant transition costs, which may provide the best explanation of why we are likely to live considerably longer before seeing the funeral procession for passwords arrive at the cemetery." See also Access code (disambiguation) Authentication CAPTCHA Cognitive science Combination lock Diceware Electronic lock Kerberos (protocol) Keyfile Passphrase Password cracking Password fatigue Password length parameter Password manager Password notification e-mail Password policy Password psychology Password strength Password synchronization Password-authenticated key agreement Personal identification number Pre-shared key Rainbow table Random password generator Secure Password Sharing Self-service password reset Shibboleth Usability of web authentication systems References External links Graphical Passwords: A Survey Large list of commonly used passwords Large collection