Porous cellulose beads modified by histidine (PCBH) were prepared. The adsorption capacity of PCBH for divalent Mg(II), Cu(II), Pb(II) and Hg(II) ions were determined. The effects of the temperature, the initial pH va...Porous cellulose beads modified by histidine (PCBH) were prepared. The adsorption capacity of PCBH for divalent Mg(II), Cu(II), Pb(II) and Hg(II) ions were determined. The effects of the temperature, the initial pH value, the concentration of metal ion and PCBH ligand on the adsorption of Cu(II) Hg (II) were discussed. The adsorption process fitted to Freundlich adsorption isotherms for both metal ions. Adsorption rate constants were also found.展开更多
Stealth address protocol(SAP)is widely used in blockchain to achieve anonymity.In this paper,we formalize a key derivable signature scheme(KDS)to capture the functionality and security requirements of SAP.We then prop...Stealth address protocol(SAP)is widely used in blockchain to achieve anonymity.In this paper,we formalize a key derivable signature scheme(KDS)to capture the functionality and security requirements of SAP.We then propose a framework to construct key separation KDS,which follows the key separation principle as all existing SAP solutions to avoid the reuse of the master keys in the derivation and signature component.We also study the joint security in KDS and construct a key reusing KDS framework,which implies the first compact stealth address protocol using a single key pair.Finally,we provide instantiations based on the elliptic curve(widely used in cryptocurrencies)and on the lattice(with quantum resistance),respectively.展开更多
文摘Porous cellulose beads modified by histidine (PCBH) were prepared. The adsorption capacity of PCBH for divalent Mg(II), Cu(II), Pb(II) and Hg(II) ions were determined. The effects of the temperature, the initial pH value, the concentration of metal ion and PCBH ligand on the adsorption of Cu(II) Hg (II) were discussed. The adsorption process fitted to Freundlich adsorption isotherms for both metal ions. Adsorption rate constants were also found.
基金National Key Research and Development Program of China(Grant No.2022YFB2702701).
文摘Stealth address protocol(SAP)is widely used in blockchain to achieve anonymity.In this paper,we formalize a key derivable signature scheme(KDS)to capture the functionality and security requirements of SAP.We then propose a framework to construct key separation KDS,which follows the key separation principle as all existing SAP solutions to avoid the reuse of the master keys in the derivation and signature component.We also study the joint security in KDS and construct a key reusing KDS framework,which implies the first compact stealth address protocol using a single key pair.Finally,we provide instantiations based on the elliptic curve(widely used in cryptocurrencies)and on the lattice(with quantum resistance),respectively.
