◆Virus Countermeasure
　 The network environment of whole company is covered by network administration and firewalls.
　 All the PCs are installed with network version anti-virus software.
　 The PC used for common developing could not use the internet.
　 Prepare the special machines for communication and online-seeking, and those machines couldn’t contact with the CP used for development.
◆Secret-disclosing Countermeasure
　 All the employees should sign the confidential contract when entering into the company.
　 To prevent the internal material from out-flowing, the CD driver, flash-ROM and floppy disk on the PCs used for common developing are not allowed to use.
　 The machine case of the PCs used for developing should be locked.