Commonly used authentication schemes are textual passwords, graphical passwords and biometrics.

3D password is a multifactor authentication scheme.

To be authenticated, we require a 3D virtual environment.

Combines recognition, recall, token, and biometrics based systems.

Users choice to select the type of authentication technique.

KNOWLEDGE BASED Recall basedRecognition based

TOKEN BASEDe.g : smart card

BIOMETRIC BASED

◦ Fingerprint ,palm prints ,hand geometry ,face recognition◦ Intrusiveness upon a user’s personal characteristics.

GRAPHICAL PASSWORDS

◦ Recognition based◦ Recall based

New scheme should combine the existing authentication schemes

Freedom to select the type of authentication technique.

Should provide secrets that are easy to remember, difficult to guess.

3D environment space represented by the co-ordinates

User navigate into the 3D virtual environment using any input device.

The sequence of actions and interactions forms the users 3D password.

Real-life similarity

Object uniqueness and distinction

Three-dimensional virtual environment

System importance

Critical servers.

Nuclear and military facilities.

Airplanes and jet fighters.

ATM, desktop computers and laptops.

3D Password Space Size.

3D Password Distribution Knowledge.

Brute Force Attack

Well-Studied Attack

Shoulder Surfing Attack

Timing Attack

Commonly used authentication schemes are vulnerable to attacks.

3D Password is a multifactor authentication scheme.

Design of 3D virtual environment, selection of objects inside the environment, and the object type reflects the resulted password space.

User’s choice and decision to construct the desired and preferred 3D password