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Denial of service (DOS) attacks are a serious threat to network security. These attacks are often sourced from virtual machines in the cloud, rather than from the attacker's own machine, to achieve anonymity and higher network bandwidth. Past research focused on analyzing traffic on the destination (victim's) side with predefined thresholds. These approaches have significant disadvantages. They are...
In this paper we present our vision for Security on Demand in cloud computing: a system where cloud providers can offer customized security for customers' code and data throughout the term of contract. Security on demand enables security-focussed competitive service differentiation and pricing, based on a threat model that matches the customer's security requirements for the virtual machine he is...
Hardware-software security architectures can significantly improve the security provided to computer users. However, we are lacking a security verification methodology that can provide design-time verification of the security properties provided by such architectures. While verification of an entire hardware-software security architecture is very difficult today, this paper proposes a methodology...
Cloud computing, enabled by virtualization technologies, is becoming a mainstream computing model. Many companies are starting to utilize the infrastructure-as-a-service (IaaS) cloud computing model, leasing guest virtual machines (VMs) from the infrastructure providers for economic reasons: to reduce their operating costs and to increase the flexibility of their own infrastructures. Yet, many companies...
We present Bastion, a new hardware-software architecture for protecting security-critical software modules in an untrusted software stack. Our architecture is composed of enhanced microprocessor hardware and enhanced hypervisor software. Each trusted software module is provided with a secure, fine-grained memory compartment and its own secure persistent storage area. Bastion is the first architecture...
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