This position paper discusses the problem of evaluating a function on an untrusted host, while maintaining the confidentiality of the function. A new non-interactive protocol designed to evaluate a function on an untrusted host is presented. The protocol prevents the disclosure of the function under cryptographic assumptions.

The paper studies the capacity of the OFDM and the OFDMA relay networks. Two relay schemes, amplify-and-forward (AF) relay and decode-and-forward (DF) relay are analyzed and compared for both OFDM and OFDMA relay networks. A relay node selection algorithm is proposed for OFDMA relay network. Numerical results show that under small relay power transmission, AF outperforms DF while the opposite i...