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    Methods and systems for searching
    2.
    发明授权
    Methods and systems for searching 有权

    公开(公告)号：US11586674B2

    公开(公告)日：2023-02-21

    申请号：US15392023

    申请日：2016-12-28

    Applicant: Khalifa University of Science and Technology ,  British Telecommunications plc ,  Emirates Telecommunications Corporation

    Inventor： Di Wang ,  Ivan Boyd ,  Ahmad Al-Rubaie ,  Jason Ng

    IPC: G06F16/901 ,  G06F16/22

    Abstract: This invention relates to methods and systems for searching. It is particularly applicable to methods of searching which enable efficient identification of compatible portfolios. Embodiments of the invention propose methods of searching which address the huge search space issue associated with identifying compatible portfolios. In particular, embodiments of the invention start their search operations simultaneously from both sides by both trying to form valid portfolios from candidate products until a valid solution is found and trying to find conflicts from the defined compatibility rules until a conflict is found which leads to the conclusion that no valid solution exists. A conclusion from either process will stop the whole searching process which can significantly reduce blind and unnecessary searching in the whole search space. In embodiments of the invention, the two sides of the search process are also connected in a way which permits two-way communications between the processes to share information about invalid search branches during the execution of the search. The shared information is then used to direct the current and later stage of search execution. Such exchange of information can also significantly reduce the search space and create more efficient searching systems and methods, particularly by stopping search agents from carrying out invalid future searches in branches that another agent has already identified as invalid.

    Suspicious program detection
    10.
    发明授权
    Suspicious program detection 有权

    公开(公告)号：US09747447B2

    公开(公告)日：2017-08-29

    申请号：US14779620

    申请日：2014-03-24

    Applicant: BRITISH TELECOMMUNICATIONS PLC

    Inventor： Fadi El-Moussa

    IPC: G06F21/56

    CPC classification number: G06F21/566 ,  G06F2221/033

    Abstract: A processing device (10) includes a processor (12), an interface (14) and a memory (100). The memory (100) is formed from system Random Access Memory (RAM) and one or more other storage devices. The memory (100) can be considered as comprising working memory (110) and persistent storage (120). The working memory includes the system RAM but may also use memory from one or more other storage devices and when certain suspicious program detection modules are operating also stores a comparison table (112) discussed below. Contained within the persistent storage are several executable program files as follows: an Absolute Memory Address Calculator executable program (121) which is responsible for causing the system (10) to inspect a copy of a persistently stored (and compiled) executable program (e.g. an executable program (125, 126, 127, . . . as stored in the persistent storage 120) and to calculate expected absolute memory locations for the various functions or helper programs that it makes calls to and to store these in a table (112) that it creates in the working memory (110) for this purpose; a Loaded Program Accessor executable program (122) which is responsible for causing the system (10) to inspect a copy of an executable program as loaded in the working memory (110) of the system after loading and linking of the program have been completed, to determine the actual memory locations stored in the Import Address Table (IAT) of the loaded program, and to store these actual memory locations in the comparison table (112); a Memory Location Comparator executable program (123) which is responsible for causing the system (10) during execution of this program to compare the calculated expected absolute memory locations with their respective actual accessed memory locations as stored in the comparison table of memory locations (112); and a Corroborator executable program (124) which is responsible for causing the system (10) during execution of this program to perform a corroboration of any mismatches of memory locations detected in the memory location pairs stored in the table (112) of memory locations, by, in the present embodiment, inspecting the contents of any executable instructions contained at the actually accessed memory location to look for the presence of an instruction causing a new thread of execution to be instantiated.

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