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Mobile communication systems now constitute an essential part of life throughout the world. Fourth generation “Long Term Evolution” (LTE) mobile communication networks are being deployed. The LTE… (More)
- Helger Lipmaa, N. Asokan, Valtteri Niemi
- Financial Cryptography
- 2001
We argue that threshold trust is not an option in most of the real-life electronic auctions.After that we propose two new cryptographic Vickrey auction schemes that involve, apart from the bidders… (More)
- N. Asokan, Valtteri Niemi, Kaisa Nyberg
- Security Protocols Workshop
- 2002
Deploying a new security protocol is expensive. This encourages system designers to look for ways of re-using existing infrastructure. When security protocols and components are re-used, it is… (More)
- Valtteri Niemi, Ari Renvall
- Theor. Comput. Sci.
- 1998
Many simple calculations can be done easier without computers than by using them. We show that the same holds for secure multiparty computations if the function to be computed is simple enough. Our… (More)
- Valtteri Niemi, Ari Renvall
- ASIACRYPT
- 1994
- Igor Bilogrevic, Murtuza Jadliwala, +4 authors Valtteri Niemi
- Journal of Systems and Software
- 2011
Mobile devices are increasingly being used to store and manage users’ personal information, as well as to access popular third-party context-based services. Very often, these applications need to… (More)
- Igor Bilogrevic, Kévin Huguenin, +4 authors Valtteri Niemi
- WPES
- 2013
WiFi base stations are increasingly deployed in both public spaces and private companies, and the increase in their density poses a significant threat to the privacy of connected users. Prior studies… (More)
- Imad Aad, Valtteri Niemi
- 2010
Nokia Research Center (NRC) in Lausanne, Switzerland has launched a rich data collection campaign during fall 2009, the purpose of which is to study user socio-geographical behavior, mobility… (More)
- Debmalya Biswas, Valtteri Niemi
- 2011 IEEE 13th International Symposium on High…
- 2011
With more and more personal data being collected and stored by service providers, there is an increasing need to ensure that their usage is compliant with privacy regulations. We consider the… (More)