In one embodiment, an apparatus comprises: a first logic to receive a user selection of an authentication shape, the authentication shape to be displayed on a display of a system during a user authentication, associate at least one identity characteristic with each of a plurality of sides of the authentication shape, and receive a plurality of user indications each corresponding to a manipulation of the authentication shape to enable one of the plurality of sides of the authentication shape to be a prominent side of the authentication shape on the display; an encoding logic to encode an identification of the authentication shape, the at least one identity characteristic associated with each of the plurality of sides, and the plurality of user indications into an encoded value; a security logic to generate a secure authentication value based on the encoded value; and a secure storage to store the secure authentication value. Other embodiments are described and claimed.