Karl Ackerman

Device presence validation

Defeating real-time trojan login attack with delayed interaction with fraudster

Near field communication based authentication

Localized risk analytics for user authentication

Managing predictions in data security systems

Knowledge based authentication using recent user internet activity

Processorless token for producing a one-time password

Brokering multiple authentications through a single proxy

Authentication using privacy protected personally identifiable information

Data recovery service with automated identification and response to compromised user credentials