600 results about "Virus free" patented technology

The present invention relates to computer viruses and more particularly to a method and system, for use in a virus-free certificate cache (106), of caching one or multiple virus-free certificates (200), each virus-free certificate certifying that a file is virus-free. The method comprises the steps of: receiving (601) a virus-free certificate request for a file; identifying (602) the file in a cache table (501), the cache table (501) comprising for each identified file (502) one or a plurality of virus-free certificates (509); selecting in the cache table (501) one virus-free certificate (509) for the identified file (502), using one or a plurality of anti-virus criteria; retrieving (602) from the cache table (501) the selected virus-free certificate (509); sending back (606) in response to the virus-free certificate request the retrieved virus-free certificate.

The present invention is directed to computer viruses and more particularly to a method and system for use in a virus-free certificate firewall, of controlling and filtering files using a virus-free certificate. An example embodiment of the method comprises the steps of: receiving a file; if a virus-free certificate (200) is required for the file: determining whether the a virus-free certificate is already associated with the file; if a virus-free certificate is already associated with the file: authenticating the associated virus-free certificate, said virus-free certificate comprising a certificate signature; if the virus-free certificate is authenticated, determining whether the file is virus-free or not; if the file is virus-free, forwarding the file with the associated virus-free certificate; if the virus-free certificate is not authenticated or if no virus-free, certificate is associated with the file; determining whether the file is virus-free or not, if the file is virus-free, associating with the file a new virus-free certificate; and forwarding the file with the new virus-free certificate.

The present invention relates to computer viruses and more particularly to a method and system for caching anti-virus file certificates. Each anti-virus certificate associated with a file comprises a file signature. The file signature is generated by a virus-free certificate authority, which avoids the system, which receives the file to check this file for all existing viruses. The virus-free certificate authority validates the file against all known viruses, using one or several anti-virus checkers. In case of new viruses, only the virus-free certificate authority is changed and the only process performed by the system receiving the file is to verify the file against the file signature included in the virus-free certificate, and to filter the file according predetermined rules. The present invention drastically simplifies the computing resources for detecting viruses on network devices such as IP Routers and Firewalls.

A system and method update client computers of various end users with software updates for software products installed on the client computers, the software products manufactured by diverse, unrelated software vendors. The system includes a service provider computer system, a number of client computers and software vendor computer systems communicating on a common network. The service provider computer system stores in an update database information about the software updates of the diverse software vendors, identifying the software products for which software updates are available, their location on the network at the various software vendor computer systems, information for identifying in the client computers the software products stored thereon, and information for determining for such products, which have software updates available. Users of the client computers connect to the service provider computer and obtain a current version of portions of the database. The client computer determines that software products stored thereon, and using this information, determines from the database, which products have updates available, based on product name and release information for the installed products. The user selects updates for installation. The selected updates are downloaded from the software vendor computer systems and installed on the client computer. Payment for the software update and the service is mediated by the service provider computer. Authentication of the user ensures only registered users obtain software updates. Authentication of the software updates ensures that the software updates are virus free and uncorrupted. Changes to the client computer during installation are monitored and archived, allowing the updates to be subsequently removed by the user.

The invention provides a method and system for performing specialized services for files at a server, such as scanning files for viruses. A filer or other server is connected to one or more supplementary computing devices that scan requested files to ensure they are virus free prior to delivery to end users. When an end user requests a file the following steps occur: The server determines whether the file requested must be scanned before delivery to the end user. The server opens a channel to one of the external computing devices and sends the filename. The external computing device opens the file and scans it. The external computing device notifies the filer the results of the file scan operation. The server sends the file to the end user provided the status indicates it may do so.

A "Jiuxiang" strawberry stem tip rapid breeding method by tissue culture and virus removal is disclosed. The rapid breeding method includes: explant disinfection, stem tip tissue virus removal and culture, multiplication culture, rooting culture, seedling hardening and transplanting. A stem tip tissue culture method is adopted to breed "Jiuxiang" strawberry virus-free seedlings, thus ensuring that all the excellent characteristics of parents are stably inherited, and therefore influences of outside conditions can be prevented, and the rapid breeding method can be performed at all seasons, thus saving the seedling culture land, and reducing the production cost. A large quantity of good test-tube plantlets can be produced in a short period of time. Large-scale production can be performed to provide "Jiuxiang" strawberry seedlings with a large quantity and good quality for the market so as to meet market needs. The "Jiuxiang" strawberry virus-free seedlings prepared by the rapid breeding method are high in growth vigor, disease-resistant and increased in big-fruit yield. The yield can be increased by 30-50%.