Abstract: A method of authentication of users in a data processing system is provided. The method includes a “Challenge” univocally associated with a user to be authenticated; processing the “Challenge” to generate an expected answer code, to be compared with an answer code that the user has to provide for authentication; encoding the generated “Challenge” for obtaining an image displayable through a display device; sending the image containing the “Challenge” to the user; displaying the image containing the “Challenge”; through a user device provided with an image-capturing device, optically capturing the displayed image; through the user device, processing the captured image for extracting from the captured image the “Challenge”, and subsequently processing the obtained “Challenge” for generating the answer code; receiving the answer code from the user and comparing it to the expected answer code; and, in case of positive comparison, authenticating the user.

Abstract: The transfer of messages using an UDP transport is provided. A typical example is offered by the SNMP messages, used to perform the communication (C1, C2) between manager units (M, M?) and agent units (A, A?) within a system for the management of data communication networks, such as internet. The payload of messages, for example the messages as a whole shall undergo a compression operation based on the recognition of sequences that periodically appear in the message.

Abstract: A method of authentication of users in a data processing system is provided. The method includes a “Challenge” univocally associated with a user to be authenticated; processing the “Challenge” to generate an expected answer code, to be compared with an answer code that the user has to provide for authentication; encoding the generated “Challenge” for obtaining an image displayable through a display device; sending the image containing the “Challenge” to the user; displaying the image containing the “Challenge”; through a user device provided with an image-capturing device, optically capturing the displayed image; through the user device, processing the captured image for extracting from the captured image the “Challenge”, and subsequently processing the obtained “Challenge” for generating the answer code; receiving the answer code from the user and comparing it to the expected answer code; and, in case of positive comparison, authenticating the user.

Abstract: UDP messages incorporating respective payloads are transferred by the steps of first encoding each of the payloads into hexadecimal format and then compressing the encoded payloads based on the recognition of sequences that periodically appear in the respective messages.

Abstract: A method for managing at least one managed object (B1, . . . , BN) through a communication network (R) by at least one manager object, comprising the following operations:—providing at least one intermediate object or hierarchic agent (AG) configured to manage said at least one managed object (B1, . . . , BN) according to a data set (1100), said management being translated into a set of results (1104),—providing said data set (1100) from said at least one manager object (A) to said intermediate object (AG),—managing said at least one managed object (B1, . . . , BN) through said at least one intermediate object (AG), to generate said set of results (1104), and—transferring (1108) said set of results (1104) from said at least one intermediate object (AG) to said at least one manager object (A). Preferably, communication between manager object (A) and intermediate object (AG) implements UDP protocol and compressed mode.

Abstract: The invention concerns the transfer of messages using an UDP transport. A typical example is offered by the SNMP messages, used to perform the communication (C1, C2) between manager units (M, M?) and agent units (A, A?) within a system for the management of data communication networks, such as internet. The payload of messages and preferably the messages as a whole shall undergo a compression operation based on the recognition of sequences that periodically appear in the message.