Dog series - NetDog Product introduction Free encryption solution with compatible parallel interface and USB interface. NetDog is an encryption product used for network software protection. It supports Windows, Netware and Linux network. NetDog hardware have data storage area and optional encryption algorithm and they can be inserted on parallel interface or USB interface of computer. Each NetDog hardware has a based storage area of 200 bytes; PNI hardware has an extended storage area of 5,120 bytes. NetDog developer kit is comprised of a hardware Dog, a program interface module with various development languages and tool software used for encryption. It enables software developer to protect the software from being copied and used illegally by various means.NetDog has three types: Parallel interface type, USB type and Parallel interface + USB type: Product features Operational principle Enhanced function of NetDog Development Kit V2.2 New functions of NetDog Development Kit V2.2 Applicable languages and environments Product Features NetDog is applicable to Windows, NetWare and Linux Network; only one Dog server is required before all clients in the entire network can use the encryption software. NetDog supports DOS, Windows 3.X/9X/ME/NT/2000/XP and Linux operating systems and almost all mainstream programming languages and development tools. Main features of NetDog: Microprocessor A microprocessor is build in NetDog, the solidified microprocessor software cannot be read out from outside, therefore it cannot be copied. Memory There are 200 bytes nonvolatile memory in NetDog; it can be used to store some key data of developer or some configuration parameters. Service procedures NetDog has independent service procedures and multiple NetDogs only need to run one service program NetDog Client NetDog Client can run under DOS, Windows3.x, Windows9x, Windows NT, Windows2000 and Linux at the same time, there is no interfere between clients. Multi-Netcard NetDog server and NetDog client support multi-Netcard. Multi-Process NetDog client can run 50 processes at the same time. Protocols TCP/IP, IPX and NETBIOS are supported; router, exchanger and hub can be penetrated. Developer can set password to NetDog, if password is wrong, the data area of NetDog can not be accessed, and the maximum user number can not be modified. Anti-tracing Unique data exchange random noise technique of SafeNet China can effectively antagonize logic analyzer and other debug tools. Cascade NetDogs with different serial number can be cascaded. It is smaller in size and easier to use. Time lock Time lock is built in NetDog; all the operations must be completed in the specified duration. Time for normal operation of NetDog is very short, if the stipulated period of time is exceeded, NetDog will return to error value. Tools A set of perfect development tools: NetDog edit tool, network-testing tool and installation tool. Operational principle Application program operates on NetDog by calling the interface modules of Dog client; interface modules communicate with Dog server; Dog server operates on NetDog hardware and returns the relevant data to the application program through interface module. Application program can judge on the returned value and take corresponding actions. Return of ineffective responses indicate that no correct Dog is available; in this case, application program will stop running. Simple schematic diagram is shown as below: " Inquiry train sent by p