Abstract: In one example, a proxy server acts as a gateway to a website and modifies the traffic between a web browser on a user device and the website server, as necessary to request protection by providing step-up authentication and/or transaction verification. The proxy server blocks transactions when protection is required but has not occurred (either because the authentication was not proper or due to the detection of another problem). Associated methods and systems are also provided.

Abstract: In one example, a proxy server acts as a gateway to a website and modifies the traffic between a web browser on a user device and the website server, as necessary to request protection by providing step-up authentication and/or transaction verification. The proxy server blocks transactions when protection is required but has not occurred (either because the authentication was not proper or due to the detection of another problem). Associated methods and systems are also provided.

Abstract: A process for reducing the restart pressure of streams selected from waxy crude oils, water-in-crude emulsions and dispersions of hydrocarbon hydrates, at least partially structured. A mechanic disturbance is applied, in flow-stop conditions, on the streams, having: temperatures lower than the WAT (Wax Appearance Temperature) for the waxy crude oils and water-in-crude emulsions; temperatures lower than the forming temperatures of the hydrates and pressures higher than the forming pressure of the hydrates, for the dispersions of hydrocarbon hydrates.

Abstract: Process for the disposal of sulfur which comprises melting the sulfur, optionally in the presence of hydrogen sulfide, and injecting the molten sulfur into geological structures having a temperature ranging from 90 to 160° C.

Abstract: Process for the production of sulfur, obtained in pure form, and possibly easily disposable even at ambient tem-perature, starting from hydrogen sulphide contained in natural gas, which includes: a) oxidizing a portion of hydrogen sulphide to sulfur dioxide; b) dissolving in water the sulfur dioxide obtained in step (a); c) carrying out the reaction (I): 2H2S+SO2?3S+2H20 (I) making the remaining hydrogen sulphide to react with the solution prepared in step (b); and d) using the thus obtained sulfur suspension for the production sulfur or, alternatively, to use it for the disposal of the sulfur itself in a site reserved for such purpose.

Abstract: Process for the disposal of sulfur in the liquid state which comprises: a) transforming elemental sulfur into sulfanes having the general formula H2Sn+1, wherein n is a number from 1 to 7; b) optionally mixing elemental sulfur in powder form with the liquid sulfanes, up to such a concentration as to guarantee the pumpability of the mixture; c) injecting the sulfanes liquid at room temperature into geological formations having a temperature lower than 150° C.

Abstract: A process is described for reducing the production of water in oil wells which comprises the injection into the formation around the well of an aqueous solution of one or more polymers selected from those having general formula (1) [] wherein: n ranges from 0.70 to 0.98; m ranges from 0.30 to 0.02; n+m=1; X1 and X2, the same or different, are selected from H an CH3; R1, R2, R3, the same or different, are selected from C1-C10 monofunctional hydrocarbyl groups; x ranges from 2 to 5.

Abstract: A process is described for reducing the production of water in oil wells which comprises the injection into the formation around the well of an aqueous solution of one or more polymers selected from those having general formula (1) [ ] wherein: n ranges from 0.70 to 0.98; m ranges from 0.30 to 0.02; n+m=1; X1 and X2, the same or different, are selected from H an CH3; R1, R2, R3, the same or different, are selected from C1-C10 monofunctional hydrocarbyl groups; x ranges from 2 to 5.

Abstract: A new design procedure for constructing a family of DES-like Substitution-Permutation Network (SPN) cryptosystems with desirable cryptographic properties including provable resistance to differential cryptanalysis, linear cryptanalysis, and related-key cryptanalysis is described. New cryptosystems called CAST ciphers, constructed according to the procedure, are also described. Details of the design choices in the procedure are given, including those regarding the component substitution boxes (s-boxes), the overall framework, the key schedule, and the round function. A fully specified example CAST cipher, an output of this design procedure, is presented as an aid to understanding the concepts and to encourage detailed analysis by the cryptologic community.