Abstract: A hierarchical security model for networked computer users is described. Files and resources are controlled or created by users within the network. Each user within the network has an account that is managed by a network administrator. The account specifies the user identifier and password. Users are grouped into organizations depending upon function or other organizational parameter. The groups within the network are organized hierarchically in terms of access and control privileges. Users within a higher level group may exercise access and control privileges over files or resources owned by users in a lower level group. The account for each user further specifies the group that the owner belongs to and an identifier for any higher level groups that have access privileges over the user's group. All users within a group inherit the rights and restrictions of the group.

Abstract: A hierarchical security model for networked computer users is described. Files and resources are controlled or created by users within the network. Each user within the network has an account that is managed by a network administrator. The account specifies the user identifier and password. Users are grouped into organizations depending upon function or other organizational parameter. The groups within the network are organized hierarchically in terms of access and control privileges. Users within a higher level group may exercise access and control privileges over files or resources owned by users in a lower level group. The account for each user further specifies the group that the owner belongs to and an identifier for any higher level groups that have access privileges over the user's group. All users within a group inherit the rights and restrictions of the group.

Abstract: A hierarchical security model for networked computer users is described. Files and resources are controlled or created by users within the network. Each user within the network has an account that is managed by a network administrator. The account specifies the user identifier and password. Users are grouped into organizations depending upon function or other organizational parameter. The groups within the network are organized hierarchically in terms of access and control privileges. Users within a higher level group may exercise access and control privileges over files or resources owned by users in a lower level group. The account for each user further specifies the group that the owner belongs to and an identifier for any higher level groups that have access privileges over the user's group. All users within a group inherit the rights and restrictions of the group.

Abstract: A hierarchical security model for networked computer users is described. Files and resources are controlled or created by users within the network. Each user within the network has an account that is managed by a network administrator. The account specifies the user identifier and password. Users are grouped into organizations depending upon function or other organizational parameter. The groups within the network are organized hierarchically in terms of access and control privileges. Users within a higher level group may exercise access and control privileges over files or resources owned by users in a lower level group. The account for each user further specifies the group that the owner belongs to and an identifier for any higher level groups that have access privileges over the user's group. All users within a group inherit the rights and restrictions of the group.

Abstract: A hierarchical security model for networked computer users is described. Files and resources are controlled or created by users within the network. Each user within the network has an account that is managed by a network administrator. The account specifies the user identifier and password. Users are grouped into organizations depending upon function or other organizational parameter. The groups within the network are organized hierarchically in terms of access and control privileges. Users within a higher level group may exercise access and control privileges over files or resources owned by users in a lower level group. The account for each user further specifies the group that the owner belongs to and an identifier for any higher level groups that have access privileges over the user's group. All users within a group inherit the rights and restrictions of the group.

Abstract: A computer system includes a web client having a client based program residing on it, a firewall having a protocol proxy residing on it, and a host server having an application program and a special window manager residing on it. All communications between the protocol proxy and the application program go through the special window manager. The web client communicates with the firewall through the Internet, and the firewall communicates with the host server through a LAN. The client based program employs HTTP, and the special window manager employs a persistent connection, socket-based protocol. The protocol proxy establishes and maintains a persistent connection with the special window manager, and communicates information back and forth between the client based program and the application program through the special window manager by first protocol translating the information between HTTP and the special window manager's persistent connection, socket-based protocol.

Abstract: A method of conducting an interactive design conference over the Internet, comprises: selectively admitting clients communicating through web browsers over the Internet to an interactive design conference; receiving a graphics file indicative of a design from one of the clients; and transmitting the graphics file to the other clients so as to be viewable as a graphics image through graphics file readers in the client web browsers. The graphics file is generated by a snapshot program previously transmitted to a client initiating the design conference and controlling the design database. Java applets are transmitted to each of the design conference participants to facilitate communicating annotations of the graphics image and messages between clients through their web browsers.

Abstract: A method for automatically recording snapshots of a computer screen during a computer session for later playback, comprises receiving a start indication, and automatically recording snapshots of a computer screen periodically during the computer session after the start indication is reached. An apparatus for performing such function comprises a frame buffer for storing snapshots of the computer screen, a FIFO cache memory, a mass storage memory, and programmed means. The programmed means receives a start indication, periodically copies data from the frame buffer to the FIFO cache memory during a computer session after the start indication is reached, and compresses the stored data before storing it the mass storage memory for later playback.

Abstract: A method for automatically recording snapshots of a computer screen during a computer session for later playback, comprises receiving a start indication, and automatically recording snapshots of a computer screen periodically during the computer session after the start indication is reached. An apparatus for performing such function comprises a frame buffer for storing snapshots of the computer screen, a FIFO cache memory, a mass storage memory, and programmed means. The programmed means receives a start indication, periodically copies data from the frame buffer to the FIFO cache memory during a computer session after the start indication is reached, and compresses the stored data before storing it the mass storage memory for later playback.

Abstract: A method is described that is implemented by a server for securely providing a text file to a client for execution. The method includes providing an encrypted text file and a program facilitating execution of the encrypted text file to the client. Such providing may be over the Internet or using a computer readable medium such as compact disc. The provided program responds to a run command to decrypt the encrypted text file, and feed the decrypted text file to an interpreter for execution.

Abstract: A method for conducting a collaboration session, comprising: launching a collaboration session through a program on a computer so as to communicate with other computers concurrently logged on a network; and generating a graphics file including pixel information of a graphics image displayable on a display screen of the computer for transmission to the other computers so as to be viewable through graphics file readers associated with web browsers of the other computers during the collaboration session.

Abstract: A method and apparatus for rendering an integrated circuit design layout is described. Graphics files are generated for selected zoom-in factors from cell-based information of the integrated circuit design, and stored in memory. When a computer operator selects a zoom-in factor greater by a predetermined amount than the largest of such selected zoom-in factors, a selector enables a rendering engine to render the integrated circuit design layout from the cell-based information. On the other hand, when the computer operator selects a zoom-in factor less than the largest of such selected zoom-in factors plus the predetermined amount, the selector enables a graphics processor to render the integrated circuit design layout from appropriate ones of the graphics files.

Abstract: A method and apparatus for providing conditional access to the source code of a program are described. An encrypted version of the source code is provided along with a binary executable version of the source code to a recipient. An escrow holder holds a software key for decrypting the encrypting source code, and releases the software key to the recipient only upon satisfaction of a release condition detailed in an escrow agreement executed by the program's vendor and the recipient.