Abstract: The invention provides a method for frequent verifications of the identity of a user performed during a long session of client-server communication by secure exchange of keys between the client and the server. A user is represented at the server by a set of random numbers that have nothing to do with his biometric data. The server initiates authentication requests by sending encoded randomly generated permutation to the client. On each request, the client creates a dynamic response key built by using the decoded permutation and biometric data of the user so that this biometric data cannot be retrieved from the key. The key also includes the correlation coefficient between the sound of the user's breathing and the distance between the most outer sides of the wings of his nose and the correlation coefficient between the area of the user's pupil and the brightness of his computer screen.

Abstract: The invention provides: methods, languages, and systems for parallel algorithmic trading of financial instruments. Each instrument of interest is included in a parallel list, in a reference list, or in both lists. Market data messages are decoded by parallel threads and converted into data series. The number of the threads is preferably equal to the number of the messages in a set of messages. A trader/market regulator selects or creates a trading/overseeing algorithm consisting of expressions based on data series extracted from the messages and on predefined functions. Some of the expressions have outputs representing buy/sell/cancel orders or have outputs aimed for overseeing trading activity. The algorithm is executed by parallel threads. The number of the threads is preferably equal to the number of the instruments in the parallel list.

Abstract: The invention provides a method for frequent verifications of the identity of a user performed during a long session of client-server communication by secure exchange of keys between the client and the server. A user is represented at the server by a set of random numbers that have nothing to do with his biometric data. The server initiates authentication requests by sending encoded randomly generated permutation to the client. On each request, the client creates a dynamic response key built by using the decoded permutation and biometric data of the user so that this biometric data cannot be retrieved from the key. The key also includes the correlation coefficient between the sound of the user's breathing and the distance between the most outer sides of the wings of his nose and the correlation coefficient between the area of the user's pupil and the brightness of his computer screen.

Abstract: The invention provides constructions of an energy analyzer with entrance angles slightly greater than ?/2. The analyzer is capable of collecting electrons in 2? azimuth directions, has a high energy resolution, and a large entrance solid angle. The analyzer is compatible with transmission electron microscopy and other surface analysis techniques.