The Undecidability of Form Equivalence for Context-Free and E0L Forms. - Valtteri Niemi (Theor. Comput. Sci., 1984)

Maximal Dense Intervals of Grammar Forms. - Valtteri Niemi (ICALP, 1988)

A New Trapdoor in Knapsacks. - Valtteri Niemi (EUROCRYPT, 1990)

Power languages and density. - Valtteri Niemi (Discret. Appl. Math., 1991)

Density in discrete systems. - Valtteri Niemi (Bull. EATCS, 1991)

Morphic Images of Gauss Codes. - Jarkko Kari; Valtteri Niemi (Developments in Language Theory, 1993)

Density in discrete systems. - Valtteri Niemi (Current Trends in Theoretical Computer Science, 1993)

How to Prevent Buying of Votes in Computer Elections. - Valtteri Niemi; Ari Renvall (ASIACRYPT, 1994)

Cryptographic Protocols and Voting. - Valtteri Niemi; Ari Renvall (Results and Trends in Theoretical Computer Science, 1994)

Colored Gauss and Tangent Codes on the Torus. - Jarkko Kari; Valtteri Niemi (Developments in Language Theory, 1995)

Multiparty Computations with a Deck of Cards. - Valtteri Niemi; Ari Renvall (Developments in Language Theory, 1997)

TWOPRIME: A Fast Stream Ciphering Algorithm. - Cunsheng Ding; Valtteri Niemi; Ari Renvall; Arto Salomaa (FSE, 1997)

Cryptology: Language-Theoretic Aspects. - Valtteri Niemi (Handbook of Formal Languages (2), 1997)

Secure Multiparty Computations Without Computers. - Valtteri Niemi; Ari Renvall (Theor. Comput. Sci., 1998)

Solitaire Zero-knowledge. - Valtteri Niemi; Ari Renvall (Fundam. Informaticae, 1999)

Efficient Voting with No Selling of Votes. - Valtteri Niemi; Ari Renvall (Theor. Comput. Sci., 1999)

Secure Vickrey Auctions without Threshold Trust. - Helger Lipmaa; N. Asokan; Valtteri Niemi (IACR Cryptol. ePrint Arch., 2001)

Man-in-the-Middle in Tunnelled Authentication Protocols. - N. Asokan; Valtteri Niemi; Kaisa Nyberg (IACR Cryptol. ePrint Arch., 2002)

UMTS security. - Valtteri Niemi; Kaisa Nyberg (Wiley, 2003)

Hiding Regular Languages. - Valtteri Niemi (Grammars and Automata for String Processing, 2003)

Cryptography in Wireless Standards: (Invited Paper). - Valtteri Niemi (IMACC, 2003)

Issues with Applying Cryptography in Wireless Systems. - Valtteri Niemi (Theory Is Forever, 2004)

Trends in mobile security standards. - Valtteri Niemi (Inf. Secur. Tech. Rep., 2004)

A User Behavior Based Trust Model for Mobile Applications. - Zheng Yan 002; Valtteri Niemi; Yan Dong; Guoliang Yu (ATC, 2008)

A Methodology towards Usable Trust Management. - Zheng Yan 002; Valtteri Niemi (ATC, 2009)

Exploring Trust of Mobile Applications Based on User Behaviors. - Zheng Yan 002; Yan Dong; Valtteri Niemi; Guoliang Yu (INTRUST, 2009)

Effects of Displaying Trust Information on Mobile Application Usage. - Zheng Yan 002; Conghui Liu; Valtteri Niemi; Guoliang Yu (ATC, 2010)

Editorial for the LTE special section. - Valtteri Niemi (Comput. Commun., 2010)

Reachability in Restricted Walk on Integers. - Philip Ginzboorg; Valtteri Niemi (J. Univers. Comput. Sci., 2010)

Privacy-preserving activity scheduling on mobile devices. - Igor Bilogrevic; Murtuza Jadliwala; Jean-Pierre Hubaux; Imad Aad; Valtteri Niemi (CODASPY, 2011)

Message Fragmentation for Disrupted Links. - Philip Ginzboorg; Valtteri Niemi; Jörg Ott (EW, 2011)

Transforming Privacy Policies to Auditing Specifications. - Debmalya Biswas; Valtteri Niemi (HASE, 2011)

Implementation of a Reputation System for Pervasive Social Networking. - Yu Chen 008; Zheng Yan 002; Valtteri Niemi (TrustCom, 2011)

Privacy, Identity and Trust in Context-Aware Mobile Services. - Valtteri Niemi (TrustCom, 2011)

Privacy-triggered communications in pervasive social networks. - Murtuza Jadliwala; Julien Freudiger; Imad Aad; Jean-Pierre Hubaux; Valtteri Niemi (WOWMOM, 2011)

Meetings through the cloud: Privacy-preserving scheduling on mobile devices. - Igor Bilogrevic; Murtuza Jadliwala; Praveen Kumar 003; Sudeep Singh Walia; Jean-Pierre Hubaux; Imad Aad; Valtteri Niemi (J. Syst. Softw., 2011)

Distributed Usage Control. - Debmalya Biswas; Nikolai Nefedov; Valtteri Niemi (ANT/MobiWIS, 2011)

Track Me If You Can: On the Effectiveness of Context-based Identifier Changes in Deployed Mobile Networks. - Laurent Bindschaedler; Murtuza Jadliwala; Igor Bilogrevic; Imad Aad; Philip Ginzboorg; Valtteri Niemi; Jean-Pierre Hubaux (NDSS, 2012)

Big Brother Knows Your Friends: On Privacy of Social Communities in Pervasive Networks. - Igor Bilogrevic; Murtuza Jadliwala; István Lám; Imad Aad; Philip Ginzboorg; Valtteri Niemi; Laurent Bindschaedler; Jean-Pierre Hubaux (Pervasive, 2012)

Distributed and minimal usage control. - Debmalya Biswas; Nikolai Nefedov; Valtteri Niemi (Serv. Oriented Comput. Appl., 2012)

Secure pervasive social networking based on multi-dimensional trust levels. - Zheng Yan 002; Mingjun Wang; Valtteri Niemi; Raimo Kantola (CNS, 2013)

Inferring social ties in pervasive networks: an on-campus comparative study. - Igor Bilogrevic; Kévin Huguenin; Murtuza Jadliwala; Florent Lopez; Jean-Pierre Hubaux; Philip Ginzboorg; Valtteri Niemi (UbiComp (Adjunct Publication), 2013)

A Research Model for Trustworthy Pervasive Social Networking. - Zheng Yan 002; Peng Zhang 004; Valtteri Niemi; Raimo Kantola (TrustCom/ISPA/IUCC, 2013)

Inferring social ties in academic networks using short-range wireless communications. - Igor Bilogrevic; Kévin Huguenin; Murtuza Jadliwala; Florent Lopez; Jean-Pierre Hubaux; Philip Ginzboorg; Valtteri Niemi (WPES, 2013)

Fragmentation algorithms for DTN links. - Philip Ginzboorg; Valtteri Niemi; Jörg Ott (Comput. Commun., 2013)

Privacy of Community Pseudonyms in Wireless Peer-to-Peer Networks. - Julien Freudiger; Murtuza Jadliwala; Jean-Pierre Hubaux; Valtteri Niemi; Philip Ginzboorg (Mob. Networks Appl., 2013)

Exploring the impact of trust information visualization on mobile application usage. - Zheng Yan 002; Conghui Liu; Valtteri Niemi; Guoliang Yu (Pers. Ubiquitous Comput., 2013)

On Reusable Projective Garbling Schemes. - Tommi Meskanen; Valtteri Niemi; Noora Nieminen (CIT, 2014)

Garbling in Reverse Order. - Tommi Meskanen; Valtteri Niemi; Noora Nieminen (TrustCom, 2014)

Message fragmentation for a chain of disrupted links. - Philip Ginzboorg; Valtteri Niemi; Jörg Ott (Comput. Commun., 2014)

Editorial: Special issue on trust in cyber, physical and social computing. - Zheng Yan 002; Guojun Wang 001; Valtteri Niemi; Robert H. Deng (Comput. Secur., 2014)

Demo: Cloud-based Security as a Service for Smart IoT Environments. - Ibbad Hafeez; Aaron Yi Ding; Lauri Suomalainen; Seppo Hätönen; Valtteri Niemi; Sasu Tarkoma (S3@MobiCom, 2015)

Private Membership Test for Bloom Filters. - Tommi Meskanen; Jian Liu; Sara Ramezanian; Valtteri Niemi (TrustCom/BigDataSE/ISPA (1), 2015)

Extended Model of Side-Information in Garbling. - Tommi Meskanen; Valtteri Niemi; Noora Nieminen (TrustCom/BigDataSE/ISPA (1), 2015)

How to Use Garbling for Privacy Preserving Electronic Surveillance Services. - Tommi Meskanen; Valtteri Niemi; Noora Nieminen (J. Cyber Secur. Mobil., 2015)

Privacy of the long-term identities in cellular networks. - Philip Ginzboorg; Valtteri Niemi (MobiMedia, 2016)

Practical Attacks Against Privacy and Availability in 4G/LTE Mobile Communication Systems. - Altaf Shaik; Jean-Pierre Seifert; Ravishankar Borgaonkar; N. Asokan; Valtteri Niemi (NDSS, 2016)

Two Schemes of Privacy-Preserving Trust Evaluation. - Zheng Yan 002; Wenxiu Ding; Valtteri Niemi; Athanasios V. Vasilakos (Future Gener. Comput. Syst., 2016)

Key technologies for 5G, the next generation of mobile networks and services. - Zheng Yan 002; Valtteri Niemi; Laurence T. Yang (Int. J. Commun. Syst., 2016)

AES and SNOW 3G are Feasible Choices for a 5G Phone from Energy Perspective. - Mohsin Khan; Valtteri Niemi (5GWN, 2017)

On De-synchronization of User Pseudonyms in Mobile Networks. - Mohsin Khan; Kimmo Järvinen 001; Philip Ginzboorg; Valtteri Niemi (ICISS, 2017)

Concealing IMSI in 5G Network Using Identity Based Encryption. - Mohsin Khan; Valtteri Niemi (NSS, 2017)

Mind Your Right to Know: On De-anonymization Auditability in V2X Communications. - Tommi Meskanen; Masoud Naderpour; Valtteri Niemi (NSS, 2017)

Private Membership Test Protocol with Low Communication Complexity. - Sara Ramezanian; Tommi Meskanen; Masoud Naderpour; Valtteri Niemi (NSS, 2017)

Evaluating the performance and privacy of a token-based collaborative recommender. - Ville Ollikainen; Valtteri Niemi (WI, 2017)

Privacy Enhanced Fast Mutual Authentication in 5G Network Using Identity Based Encryption. - Mohsin Khan; Valtteri Niemi (J. ICT Stand., 2017)

Auditable De-anonymization in V2X Communication. - Masoud Naderpour; Tommi Meskanen; Andrew Paverd; Valtteri Niemi (J. ICT Stand., 2017)

UAKA-D2D: Universal Authentication and Key Agreement Protocol in D2D Communications. - Mingjun Wang; Zheng Yan 002; Valtteri Niemi (Mob. Networks Appl., 2017)

Privacy Preserving Shortest Path Queries on Directed Graph. - Sara Ramezanian; Tommi Meskanen; Valtteri Niemi (FRUCT, 2018)

Privacy Preserving Queries on Directed Graph. - Sara Ramezanian; Tommi Meskanen; Valtteri Niemi (NTMS, 2018)

Defeating the Downgrade Attack on Identity Privacy in 5G. - Mohsin Khan; Philip Ginzboorg; Kimmo Järvinen 001; Valtteri Niemi (SSR, 2018)

Estimating Message Transmission Time Over Heterogeneous Disrupted Links. - Philip Ginzboorg; Valtteri Niemi; Jörg Ott (SPAWC, 2018)

IEEE Access Special Section Editorial: Trust Management in Pervasive Social Networking (TruPSN). - Zheng Yan 002; Honggang Wang 001; Laurence T. Yang; Valtteri Niemi (IEEE Access, 2018)

AKMA Support in Multi SIM User Equipment. - Gizem Akman; Valtteri Niemi; Philip Ginzboorg (FRUCT, 2019)

Privacy Preserving Cyberbullying Prevention with AI Methods in 5G Networks. - Sara Ramezanian; Valtteri Niemi (FRUCT, 2019)

Privacy preserving 2-party queries on bipartite graphs with private set intersection. - Sara Ramezanian; Tommi Meskanen; Valtteri Niemi (SAC, 2019)

Privacy Preserving AKMA in 5G. - Mohsin Khan; Philip Ginzboorg; Valtteri Niemi (SSR, 2019)

Privacy-Protecting Algorithms for Digraph Shortest Path Queries. - Sara Ramezanian; Tommi Meskanen; Valtteri Niemi (Int. J. Embed. Real Time Commun. Syst., 2019)

Privacy-Preserving Peer Discovery for Group Management in p2p Networks. - Tommi Meskanen; Valtteri Niemi; Jarkko Kuusijäarvi (FRUCT, 2020)

Private membership test protocol with low communication complexity. - Sara Ramezanian; Tommi Meskanen; Masoud Naderpour; Ville Junnila; Valtteri Niemi (Digit. Commun. Networks, 2020)

AI-Based Cyberbullying Prevention in 5G Networks. - Sara Ramezanian; Tommi Meskanen; Valtteri Niemi (Int. J. Embed. Real Time Commun. Syst., 2020)

Multi-party Private Set Operations with an External Decider. - Sara Ramezanian; Tommi Meskanen; Valtteri Niemi (DBSec, 2021)

Parental Control with Edge Computing and 5G Networks. - Sara Ramezanian; Tommi Meskanen; Valtteri Niemi (FRUCT, 2021)

Privacy-Preserving Access for Multi-Access Edge Computing (MEC) Applications. - Gizem Akman; Philip Ginzboorg; Valtteri Niemi (ICCSA (8), 2021)

AKMA: Delegated Authentication System of 5G. - Mohsin Khan; Philip Ginzboorg; Valtteri Niemi (IEEE Commun. Stand. Mag., 2021)

Privacy-Aware Contact Sharing for Groups in P2P Networks. - Tommi Meskanen; Jarkko Kuusijärvi; Valtteri Niemi (Int. J. Embed. Real Time Commun. Syst., 2021)

FPGA Implementations of 256-Bit SNOW Stream Ciphers for Postquantum Mobile Security. - Milad Bahadori; Kimmo Järvinen 001; Valtteri Niemi (IEEE Trans. Very Large Scale Integr. Syst., 2021)

Lightweight Privacy-Preserving Ride-Sharing Protocols for Autonomous Cars. - Sara Ramezanian; Gizem Akman; Mohamed Taoufiq Damir; Valtteri Niemi (CSCS, 2022)

Privacy-friendly Discovery of Common Friends in P2P Networks. - Tommi Meskanen; Jarkko Kuusijärvi; Sara Ramezanian; Valtteri Niemi (FRUCT, 2022)

Message from Dependability in Sensor, Cloud and Big Data System and Applications 2022 General Chairs. - Limin Xiao; Nobuyoshi Asai; Valtteri Niemi (HPCC/DSS/SmartCity/DependSys, 2022)

AKMA for Secure Multi-access Edge Computing Mobility in 5G. - Gizem Akman; Philip Ginzboorg; Valtteri Niemi (ICCSA (Workshops 4), 2022)

Location Privacy, 5G AKA, and Enhancements. - Mohamed Taoufiq Damir; Valtteri Niemi (NordSec, 2022)

A Beyond-5G Authentication and Key Agreement Protocol. - Mohamed Taoufiq Damir; Tommi Meskanen; Sara Ramezanian; Valtteri Niemi (NSS, 2022)

On Post-Quantum Identification in 5G. - Mohamed Taoufiq Damir; Valtteri Niemi (WISEC, 2022)

On Post-Quantum Perfect Forward Secrecy in 6G. - Mohamed Taoufiq Damir; Tommi Meskanen; Sara Ramezanian; Valtteri Niemi (CoRR, 2022)

Privacy-Aware Access Protocols for MEC Applications in 5G. - Gizem Akman; Philip Ginzboorg; Valtteri Niemi (Network, 2022)

Privacy-Enhanced AKMA for Multi-Access Edge Computing Mobility. - Gizem Akman; Philip Ginzboorg; Mohamed Taoufiq Damir; Valtteri Niemi (Comput., 2023)

Cybersecurity Education in Universities: A Comprehensive Guide to Curriculum Development. - Sara Ramezanian; Valtteri Niemi (IEEE Access, 2024)

Authentication of fragments with short tags. - Philip Ginzboorg; Valtteri Niemi; Jörg Ott (Theor. Comput. Sci., 2024)

Special Issue Editorial: Trustworthy and Intelligent 6G Mobile Networks. - Zheng Yan 002; Tieyan Li; Valtteri Niemi; Elisa Bertino (IEEE Netw., 2025)