by John G. Cramer Alternate View Column AV-139

An expression is derived for a Cramer-Rao lower bound on the variance of unbiased estimators of complex parameters.

We describe a CCA-secure public-key encryption scheme, in the Cramer-Shoup paradigm, based on the Linear assumption of Boneh, Boyen, and Shacham. Through a comparison to the Kiltz tag-encryption scheme from TCC 2006, our scheme gives evidence that the CramerShoup paradigm yields CCA encryption with shorter ciphertexts than the Canetti-Halevi-Katz paradigm. We present a generalization of the Lin...

This paper deals with on-line Bayesian Cramer-Rao (BCRB) lower bound for complex gains dynamic estimation of time-varying multi-path Rayleigh channels. We propose three novel lower bounds for 4QAM OFDM systems in case of negligible channel variation within one symbol, and assuming both channel delay and Doppler frequency related information. We derive the true BCRB for data-aided (DA) context a...

This paper considers strong-RSA signature schemes built from the scheme of Cramer and Shoup. We present a basic scheme encompassing the main features of the Cramer-Shoup scheme. We analyze its security in both the random oracle model and the standard model. This helps us to spot potential security flaws. As a result, we show that a seemingly secure signature scheme (Int. J. of Security and Netw...