Encrypted program distribution system using computer network

摘要

In a program distribution system including a source file sending device (10), an encrypted program distribution device (102) and an execution file receiving device (103), which are interconnected through a network (105), the encrypted program distribution device (102) examines the source file received from the source file sending device (101), and when the source file passes an examination, an execution file of the program is generated from the source file, a public key which is either unique to an execution file receiving device (103) or unique to a processor of the execution file receiving device (103) is received from the execution file receiving device (103) through the network (105), at least a part of the execution file is encrypted by using the public key, and the execution file is sent to the execution file receiving device (103).