The International Workshop on Secure Internet of Things 2014 (SIoT 2014) will be held in conjunction with the European Symposium on Research in Computer Security (ESORICS 2014) in Wroclaw, Poland, at the Institute of Mathematics and Computer Science Wroclaw University of Technology, on September 10th 2014. SIoT 2014 is a community where interested stakeholders, from academia and industry, can present their original work on providing a secure environment for connecting systems in an Internet-specific structure. The wide spread of mobile and embedded devices, able to connect to a network and share information, requires a careful look at the security risks taken by end users. In this context, the workshop will focus on contributions related to the security of mesh and machine-to-machine networks, secure software stacks running on ubiquitous network nodes, and algorithms used to provide secure end-to-end communication between nodes.