摘要:
A method for updating an ISO file, e.g., to add a digital signature to the ISO file, includes adding a supplemental file composed of, e.g., all zeroes to the ISO file before recording, and then recording the ISO file with supplemental file to an optical disk using ISO format. A digital signature is computed after recording. The zeroes in the supplemental file are replaced by the values of the digital signature and the file is re-saved. Also, an ISO file that might have a common part and several unique parts, e.g., for respective languages, is deconstructed such that only a single copy of the common part is recorded to disk, avoiding multiple recordations of the same data.
摘要:
A method for preventing malicious software from execution within a computer system is disclosed. A permutation is performed on a subset of instructions within an application program to yield a permuted sequence of instructions before any actual execution of the application program on the computer system. A permutation sequence number of the permuted sequence of instructions is stored in a permuted instruction pointer table. The permuted sequence of instructions is executed in an execution module that is capable of translating the permuted sequence of instructions to an actual machine code of a processor within the computer system according to the permutation sequence number of the permuted sequence of instructions stored in the permuted instruction pointer table.
摘要:
If a user forgets the power-on password of his computer, he can depress the “enter” key or “access” key once to cause the BIOS to locate the power-on password in memory and attempt to unlock the HDD using the power-on password to boot a secure O.S. The HDD password either can be the same as the power-on password or the HDD can recognize the power-on password for the limited purpose of allowing access to the secure O.S. In any case, the secure O.S. is booted for password reset.
摘要:
A method for booting into computer memory a non-operating system (O.S.) program from a hard disk drive (HDD) prior to booting into memory an O.S. from the HDD. The method includes establishing a table of contents (TOC) on the HDD that contains entries for special O.S. programs. A pointer to the TOC is placed in non-volatile memory of the computer that is associated with the HDD, and when BIOS of the computer is prompted to load into memory one of the special O.S. programs, the pointer is accessed and used to locate the TOC, which in turn is accessed to load the special O.S. program.
摘要:
A “setmax” command is issued in BIOS to hide the service area (HPA) of a HDD during normal operation, so that the HPA cannot be accessed or erased inadvertently by the user or by a virus. Pressing a special key (e.g., F11) during booting permits access to the HPA.
摘要:
A method for booting into computer memory a non-operating system (O.S.) program from a hard disk drive (HDD) prior to booting into memory an O.S. from the HDD. The method includes establishing a table of contents (TOC) on the HDD that contains entries for special O.S. programs. A pointer to the TOC is placed in non-volatile memory of the computer that is associated with the HDD, and when BIOS of the computer is prompted to load into memory one of the special O.S. programs, the pointer is accessed and used to locate the TOC, which in turn is accessed to load the special O.S. program.
摘要:
In the event of a virally infected MBR on a hard disk drive that might prevent booting, a service MBR in a hidden protected area (HPA) can be used to boot a service O.S., and then the service MBR can be replaced with a previously backed-up MBR, also in the HPA, to mount any missing partitions.
摘要:
A method for preventing malicious software from execution within a computer system is disclosed. Before any actual execution of an application program on a computer system, the application program needs to be cross-compiled to yield a set of cross-compiled code of the application program. The set of cross-compiled code of the application program can then be executed in an execution module that is capable of recognizing and translating the set of cross-compiled code of the application program to the actual machine code of the processor.
摘要:
A method is provided for detecting viruses. According to the method, data is stored in a journal area of memory before changes embodied in the data are written to virtual memory. At least a first portion of the data in the journal area of memory is scanned for viruses. In some embodiments, a second portion of data that immediately precedes and/or immediately follows data to which the first portion of the data pertains is scanned for viruses. Preferably, the virtual memory includes a persistent storage device. Also provided is a system that includes a processor, a memory that includes virtual memory and a journal storage area, and a virus scanner controlled by the processor. The virus scanner scans the journal storage area for viruses.
摘要:
A method and system for remotely isolating faults in computer network devices coupled to a computer network. A plurality of first computer units are coupled to the computer network. The plurality of first computer units are located on a user side of the computer network. A plurality of second computer units are coupled to the computer network. The plurality of second computer units are located on a service provider side of the network. One of the plurality of second computer units is designated to provide computing services to one of the plurality of first computer units. One of the plurality of first computer units experiencing a fault communicating with its designated second computer unit uses another of the plurality of first computer units as a proxy computer unit to remotely isolate the fault.