A Comprehensive Approach to Anomaly Detection in Relational Databases. - Adrian Spalka; Jan Lehnhardt (DBSec, 2005)

Decentralized Generation of Multiple, Uncorrelatable Pseudonyms without Trusted Third Parties. - Jan Lehnhardt; Adrian Spalka (TrustBus, 2011)

Performance-optimized Indexes for Inequality Searches on Encrypted Data in Practice. - Jan Lehnhardt; Tobias Rho; Adrian Spalka; Armin B. Cremers (ICISSP, 2015)

Indexe auf verschlüsselten Daten: Konzepte, Performanz, Sicherheitsaspekte. - Jan Lehnhardt (2019)