Teemupekka Virtanen

Learn More
Java 2 Micro Edition (J2ME) is a runtime environment for resource-constrained environments. There are already millions of J2ME enabled mobile devices that support the first version of the Mobile Information Device Profile (MIDP) in J2ME. Many security threats exist in MIDP 1.0 environment since the specification addresses only a limited number of security(More)
AIMS To investigate the production of antioxidant activity during fermentation with commonly used dairy starter cultures. Moreover, to study the development of antioxidant activity during fermentation, and the connection to proteolysis and bacterial growth. METHODS AND RESULTS Antioxidant activity was measured by analysing the radical scavenging activity(More)
Medical research requires information. Now this information is collected from various sources and the quality of information is often poor because of different coding and collection methods. In Finland we are now building the national archive to store all the patient information from both public and private service providers. We have started to design a(More)
Predictable initialization vectors in IPsec ESP encryption, allowed by the IPsec specifications and used by most implementations, compromise IPsec confidentiality. By using an adaptive chosen plaintext attack, an attacker can break low entropy plaintext blocks using brute force, and confirm guesses of the contents of arbitrary plaintext blocks. We analyze(More)
Security specifications of IT products and systems are inherently complex and may subject products to semantic threats due to misunderstanding of key aspects of security objectives by developers, customers and end users. A study is conducted on expressing the security specifications by specially interpreted UML use case diagrams to avoid misunderstanding by(More)