Safety planning in the construction industry is generally done separately from the project execution planning. This separation creates difficulties for safety engineers to analyze what, when, why and where safety measures are needed for preventing accidents. Lack of information and integration of available data (safety plan, project schedule, 2D project drawings) during the planning stage often...

With the advent and the rising popularity of networks, Internet, intranets and distributed systems, security is becoming one of the major concerns in IT research. An increasing number of approaches have been proposed to ensure the safety and security of programs. Among those approaches, certified code seems to be the most promising. Unfortunately, as of today, most of the research on certified ...

......Low-level systems software— such as operating systems, virtual machines, language runtimes, embedded software, and performance-critical applications—is commonly written in unsafe languages, notably C and C++. These low-level languages remain prevalent because they provide high performance, direct access to the underlying hardware, and explicit control over memory management. Moreover, bec...

We instantiate an Isabelle/HOL framework for proof carrying code to Jinja bytecode, a downsized variant of Java bytecode featuring objects, inheritance, method calls and exceptions. Bytecode annotated in a first order expression language can be certified not to produce arithmetic overflows. For this purpose we use a generic verification condition generator, which we have proven correct and rela...

We check statically whether it is safe for untrusted foreign machine code to be loaded into a trusted host system. (Here " safety " means that the program abides by a memory-access policy that is supplied on the host side.) Our technique works on ordinary machine code, and mechanically synthesizes (and verifies) a safety proof. Our earlier work along these lines was based on a C-like type syste...