The document discusses privacy-enhanced web search using a technique called MKSE in KNN. It proposes a framework called PP-PWS that uses vector quantization to segment and quantize datasets in order to generalize user profiles for each query while preserving privacy and security. This aims to improve over existing profile-based personalized search systems that do not support runtime profiling, have static security policies, and are vulnerable to successive and background attackers. The proposed approach is evaluated based on metrics like precision, recall, distortion and computational delay. It argues that PP-PWS enhances search quality while better protecting user privacy and security against different types of attacks.