Anti-virus chip and anti-virus method

An anti-virus method, suitable for an anti-virus chip, wherein the anti-virus chip is coupled between a connection port of an electronic device and a system circuit of the electronic device, and the anti-virus method comprises:

• detecting whether the connection port is connected to an external device;
• performing a virus-scan program on the external device to determine whether a virus exists in the external device when detecting that the connection port is connected to the external device;
• establishing a first transmission path between the connection port and the system circuit when determining that the virus does not exist in the external device;
• and
• not establishing the first transmission path when determining that the virus exists in the external device;
• wherein the anti-virus chip comprises a random access memory, the random access memory comprises a virus-induced area, the virus-induced area comprises a plurality of simulation-file system files, and the anti-virus method further comprises:
• inducing the virus to attack the virus-induced area when not discovering that the virus exists in the external device according to a plurality of virus codes in a virus database;
• determining whether the virus exists in the external device according to a virus-induced result of the virus-induced area;
• determining that the virus does not exist in the external device when the virus-induced result indicates that the virus-induced area is not attacked by the virus;
• and
• determining that the virus exists in the external device when the virus-induced result indicates that the virus-induced area is attacked by the virus.

An anti-virus chip, comprising:

• a first connection terminal, coupled to a connection port of an electronic device;
• a second connection terminal, coupled to a system circuit of the electronic device;
• a first random access memory;
• a processing unit, wherein the processing unit performs a write-test program on the first random access memory according to internal data output by the system circuit, the processing unit determines whether a virus exists in the system circuit according to a test result of the write-test program, when determining that the virus does not exist in the system circuit, the processing unit establishes a first transmission path between the first connection terminal and the second connection terminal, and when the virus exists in the system circuit, the processing unit does not establish the first transmission path;
• and
• a second random access memory, wherein the second random access memory comprises a virus-induced area, and the virus-induced area comprises a plurality of simulation-file system files, wherein when a detection unit detects that the connection port is connected to an external device, the processing unit further performs a virus-scan on the external device according to a plurality of virus codes in a virus database, when the processing unit does not discover that another virus exists in the external device according to the virus codes, the processing unit induces the another virus to attack the virus-induced area in the virus-scan, the processing unit further determines whether the another virus exists in the external device according to a virus-induced result of the virus-induced area, when the virus-induced result indicates that the virus-induced area is not attacked by the another virus, the processing unit determines that the another virus does not exist in the external device and, and when the virus-induced result indicates that the virus-induced area is attacked by the another virus, the processing unit determines that the another virus exists in the external device and does not establish the first transmission path.