The Secret Sharing scheme assumes long-lived shares. However the protection provided for such long lived and sensitive shares may be insufficient. The security in a system that is exposed to attacks and break-ins might become exhausted. The goal of the pro-active security scheme is to prevent the adversary from learning the secret or from destroying it. The Shamir’s Secret Sharing is pioneer me...

We propose efficient secret sharing schemes realizing general access structures. Our proposed schemes are perfect secret sharing schemes and include Shamir’s (k, n)-threshold schemes as a special case. Furthermore, we show that a verifiable secret sharing scheme for general access structures is realized by one of the proposed schemes. key words: (k, n)-threshold scheme, general access structure...

In global mobility networks, anonymous user authentication is an essential task for enabling roaming service. In a recent paper, Jiang et al. proposed a smart card based anonymous user authentication scheme for roaming service in global mobility networks. This scheme can protect user privacy and is believed to have many abilities to resist a range of network attacks, even if the secret informat...

during plant infection, fungal pathogens secret polygalacturonase (pg) that are capable of degrading cell wall of susceptible plant tissues. polygalacturonase-inhibiting proteins (pgips) are able to specifically inhibit fungal polygalacturonases (pgs) activity. the inhibition of fungal pgs by pgips suggests that pgips have a role in plant tolerance to fungal infections. in this study bean (dane...