More secrecy on cryptography research

More Secrecy...More Knowledge Disclosure? On Disclosure Outside of Patents

It is an important concern that innovators by waiving their patent rights might obstruct the disclosure of knowledge and therefore retard progress. This paper explores this concern by using a simple model of two innovators who must decide sequentially whether to protect an innovation with limited patent rights. Two features are crucial to the disclosure decision. First: the second inventor may ...

Secrecy Group Creation with Symmetric-Key Cryptography

We lift Cardelli, Ghelli and Gordon’s secrecy group creation operator [1] to a relative of the spicalculus that supports symmetric key cryptography, and show a natural extension of the associated type system. We then formulate a notion of secrecy preservation in the presence of cryptography, and prove that well-typed processes in the extended type system preserve secrecy of declared secrets, ev...

16 Research on DNA Cryptography

Towards Foundations of Cryptography: Investigation of Perfect Secrecy 1

In the spirit of Shannon's theory of secrecy systems we analyse several possible natural deenitons of the notion of perfect secrecy; these deenitions are based on arguments taken from probability theory, information theory, the theory of computational complexity, and the theory of program-size complexity or algorithmic information. It turns out that none of these deenitions models the intuitive...

Secrecy Without Perfect Randomness: Cryptography with (Bounded) Weak Sources

Cryptographic protocols are commonly designed and their security proven under the assumption that the protocol parties have access to perfect (uniform) randomness. Physical randomness sources deployed in practical implementations of these protocols often fall short in meeting this assumption, but instead provide only a steady stream of bits with certain high entropy. Trying to ground cryptograp...