Zhao Wang

Modeling interactive sensor-behavior with smartphones for implicit and active user authentication

2017

While the public enjoy the convenience aroused by the proliferation of the smartphones, they also face the risk of exposing their sensitive and secure information to attackers. Extant smartphone authentication methods (e.g., PIN and fingerprint) …

Hand-Interactive Behavior Analysis for User Authentication Systems with Wrist-Worn Devices

2018

The growing trend of using wearable devices for context-aware computing and pervasive sensing systems has raised its potentials for quick and reliable authentication techniques. We collect users' writing actions with their wrist-worn devices and discover …

AliCG: Fine-grained and Evolvable Conceptual Graph Construction for Semantic Search at Alibaba

2021

Conceptual graphs, which is a particular type of Knowledge Graphs, play an essential role in semantic search. Prior conceptual graph construction approaches typically extract high-frequent, coarse-grained, and time-invariant concepts from formal texts such as Wikipedia. …