Mohammad S. Kiaei

Learn More
Grain and Trivium are two hardware oriented synchronous stream ciphers proposed as the simplest candidates to the ECRYPT Stream Cipher Project , both dealing with 80-bit secret keys. In this paper we apply the linear sequential circuit approximation method to evaluate the strength of these stream ciphers against distinguishing attack. In this approximation(More)
—The increased propagation delay of future long-reach passive optical networks (LR-PONs) may lead to a significantly increased idle time and delay if optical network units (ONUs) use conventional report-grant mechanisms. Sophisticated and efficient bandwidth allocation mechanisms are required to cope with the imposed propagation delay in LR-PONs. In this(More)
Dual-failures are considered as the main contributors to service unavailability in p-cycle based mesh networks that are designed to withstand single failures. Methods such as post-failure reconfiguration and pre-failure provisioning of additional protection capacity have been considered to add another level of protection against dual-failures. In this(More)
—Designing low latency polling schemes is one of the most important parts for passive optical networks (PONs), particularly for long-reach PONs (LR-PON) which suffer from long propagation delays. Sophisticated and efficient bandwidth allocation mechanisms are required to cope with the imposed transmission delay in LR-PONs. In this work, we evaluate three(More)
Survivability is a key issue in the design of optical mesh networks. Various survivability schemes have been introduced among which p-cycle has been attracting quite a lot of attention because of its fast and efficient protection capability. The concept of p-cycle was later generalized to pre-cross-connected trails or p-trails, by noting to the fact that(More)
—Dynamic bandwidth allocation and grant scheduling are among the major issues in the design of passive optical networks. In this paper, we investigate the problem of optimal scheduling and bandwidth allocation in next generation 10G-EPON coexisting with 1G WDM-PONs. We first propose a network architecture for providing this coexistence. Then, we derive an(More)