Encrypted program distribution system using computer network
First Claim
1. A program distribution system, comprising a source file sending device, an encrypted program distribution device and an execution file receiving device, which are interconnected through a network;
- the source file sending device having;
a first sending unit configured to send a source file of a program to the encrypted program distribution device;
the encrypted program distribution device having;
a first receiving unit configured to receive the source file sent from the source file sending device;
an examination unit configured to examine the source file received by the first receiving unit;
an execution file generation unit configured to generate an execution file of the program from the source file examined by the examination unit, when the source file passes an examination by the examination unit;
a public key receiving unit configured to receive a public key which is either unique to the execution file receiving device or unique to a processor of the execution file receiving device, from the execution file receiving device, when the source file passes an examination by the examination unit;
an encryption unit configured to encrypt at least a part of the execution file by using the public key received by the public key receiving unit, when the source file passes an examination by the examination unit; and
a second sending unit configured to send the execution file encrypted by the encryption unit to the execution file receiving device, when the source file passes an examination by the examination unit; and
the execution file receiving device having;
a public key sending unit configured to send the public key to the encrypted program distribution device;
a second receiving unit configured to receive the execution file sent from the encrypted program distribution device; and
a decryption unit configured to decrypt the execution file received by the second receiving unit by using a secret key corresponding to the public key.
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Accused Products
Abstract
In a program distribution system including a source file sending device, an encrypted program distribution device and an execution file receiving device, which are interconnected through a network, the encrypted program distribution device examines the source file received from the source file sending device, 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 or unique to a processor of the execution file receiving device is received from the execution file receiving device through the network, 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.
82 Citations
31 Claims
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1. A program distribution system, comprising a source file sending device, an encrypted program distribution device and an execution file receiving device, which are interconnected through a network;
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the source file sending device having;
a first sending unit configured to send a source file of a program to the encrypted program distribution device;
the encrypted program distribution device having;
a first receiving unit configured to receive the source file sent from the source file sending device;
an examination unit configured to examine the source file received by the first receiving unit;
an execution file generation unit configured to generate an execution file of the program from the source file examined by the examination unit, when the source file passes an examination by the examination unit;
a public key receiving unit configured to receive a public key which is either unique to the execution file receiving device or unique to a processor of the execution file receiving device, from the execution file receiving device, when the source file passes an examination by the examination unit;
an encryption unit configured to encrypt at least a part of the execution file by using the public key received by the public key receiving unit, when the source file passes an examination by the examination unit; and
a second sending unit configured to send the execution file encrypted by the encryption unit to the execution file receiving device, when the source file passes an examination by the examination unit; and
the execution file receiving device having;
a public key sending unit configured to send the public key to the encrypted program distribution device;
a second receiving unit configured to receive the execution file sent from the encrypted program distribution device; and
a decryption unit configured to decrypt the execution file received by the second receiving unit by using a secret key corresponding to the public key. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A program distribution system, comprising a source file sending device, an encrypted program distribution device and an execution file receiving device, which are interconnected through a network;
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the source file sending device having;
a first sending unit configured to send a source file of a program to the encrypted program distribution device;
the encrypted program distribution device having;
a first receiving unit configured to receive the source file sent from the source file sending device;
an examination unit configured to examine the source file received by the first receiving unit;
an execution file generation unit configured to generate an execution file of the program from the source file examined by the examination unit, when the source file passes an examination by the examination unit;
a first encryption unit configured to encrypt at least a part of the execution file by using a prescribed secret key, when the source file passes an examination by the examination unit;
a public key receiving unit configured to receive a public key which is either unique to the execution file receiving device or unique to a processor of the execution file receiving device, from the execution file receiving device, when the source file passes an examination by the examination unit;
a second encryption unit configured to encrypt the prescribed secret key by using the public key received by the public key receiving unit, when the source file passes an examination by the examination unit; and
a second sending unit configured to send the execution file encrypted by the first encryption unit and the prescribed secret key encrypted by the second encryption unit to the execution file receiving device, when the source file passes an examination by the examination unit; and
the execution file receiving device having;
a public key sending unit configured to send the public key to the encrypted program distribution device;
a second receiving unit configured to receive the execution file and the prescribed secret key sent from the encrypted program distribution device; and
a first decryption unit configured to decrypt the prescribed secret key received by the second receiving unit by using a secret key corresponding to the public key; and
a second decryption unit configured to decrypt the execution file received by the second receiving unit by using the prescribed secret key decrypted by the first decryption unit. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An encrypted program distribution device, comprising:
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a receiving unit configured to receive a source file of a program sent from a source file sending device through a network;
an examination unit configured to examine the source file received by the first receiving unit;
an execution file generation unit configured to generate an execution file of the program from the source file examined by the examination unit, when the source file passes an examination by the examination unit;
a public key receiving unit configured to receive a public key which is either unique to an execution file receiving device or unique to a processor of the execution file receiving device, from the execution file receiving device through the network, when the source file passes an examination by the examination unit;
an encryption unit configured to encrypt at least a part of the execution file by using the public key received by the public key receiving unit, when the source file passes an examination by the examination unit; and
a sending unit configured to send the execution file encrypted by the encryption unit to the execution file receiving device, when the source file passes an examination by the examination unit.
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25. An encrypted program distribution device, comprising:
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a receiving unit configured to receive a source file of a program sent from a source file sending device through a network;
an examination unit configured to examine the source file received by the first receiving unit;
an execution file generation unit configured to generate an execution file of the program from the source file examined by the examination unit, when the source file passes an examination by the examination unit;
a first encryption unit configured to encrypt at least a part of the execution file by using a prescribed secret key, when the source file passes an examination by the examination unit;
a public key receiving unit configured to receive a public key which is either unique to an execution file receiving device or unique to a processor of the execution file receiving device, from the execution file receiving device through the network, when the source file passes an examination by the examination unit;
a second encryption unit configured to encrypt the prescribed secret key by using the public key received by the public key receiving unit, when the source file passes an examination by the examination unit; and
a sending unit configured to send the execution file encrypted by the first encryption unit and the prescribed secret key encrypted by the second encryption unit to the execution file receiving device, when the source file passes an examination by the examination unit.
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26. A program distribution method in a program distribution system comprising a source file sending device, an encrypted program distribution device and an execution file receiving device, which are interconnected through a network, the method comprising:
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(a) sending a source file of a program from the source file sending device to the encrypted program distribution device;
(b) receiving the source file sent from the source file sending device at the encrypted program distribution device;
(c) examining the source file received by the step (b) at the encrypted program distribution device;
(d) generating an execution file of the program from the source file examined by the step (c), at the encrypted program distribution device, when the source file passes an examination by the step (c);
(e) receiving a public key which is either unique to the execution file receiving device or unique to a processor of the execution file receiving device and which is from the execution file receiving device, at the encrypted program distribution device, when the source file passes an examination by the step (c);
(f) encrypting at least a part of the execution file by using the public key received by the step (e), at the encrypted program distribution device, when the source file passes an examination by the step (c);
(g) sending the execution file encrypted by the step (f) from the encrypted program distribution device to the execution file receiving device, when the source file passes an examination by the step (c);
(h) receiving the execution file sent from the encrypted program distribution device at the execution file receiving device; and
(i) decrypting the execution file received by the step (h) by using a secret key corresponding to the public key at the execution file receiving device.
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27. A program distribution method in a program distribution system comprising a source file sending device, an encrypted program distribution device and an execution file receiving device, which are interconnected through a network, the method comprising:
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(a) sending a source file of a program from the source file sending device to the encrypted program distribution device;
(b) receiving the source file sent from the source file sending device at the encrypted program distribution device;
(c) examining the source file received by the step (b) at the encrypted program distribution device;
(d) generating an execution file of the program from the source file examined by the step (c), at the encrypted program distribution device, when the source file passes an examination by the step (c);
(e) encrypting at least a part of the execution file by using a prescribed secret key, at the encrypted program distribution device, when the source file passes an examination by the step (c);
(f) receiving a public key which is either unique to the execution file receiving device or unique to a processor of the execution file receiving device and which is sent from the execution file receiving device, at the encrypted program distribution device, when the source file passes an examination by the step (c);
(g) encrypting the prescribed secret key by using the public key received by the step (f), at the encrypted program distribution device, when the source file passes an examination by the step (c);
(h) sending the execution file encrypted by the step (e) and the prescribed secret key encrypted by the step (g) from the encrypted program distribution device to the execution file receiving device, when the source file passes an examination by the step (c);
(i) receiving the execution file and the prescribed secret key sent from the encrypted program distribution device at the execution file receiving device;
(j) decrypting the prescribed secret key received by the step (i) by using a secret key corresponding to the public key at the execution file receiving device; and
(k) decrypting the execution file received by the step (i) by using the prescribed secret key decrypted by the step (j) at the execution file receiving device.
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28. A program distribution method, comprising:
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(a) receiving a source file of a program sent from a source file sending device through a network;
(b) examining the source file received by the step (a);
(c) generating an execution file of the program from the source file examined by the step (b), when the source file passes an examination by the step (b);
(d) receiving a public key which is either unique to an execution file receiving device or unique to a processor of the execution file receiving device, from the execution file receiving device through the network, when the source file passes an examination by the step (b);
(e) encrypting at least a part of the execution file by using the public key received by the step (d), when the source file passes an examination by the step (b); and
(f) sending the execution file encrypted by the step (e) to the execution file receiving device, when the source file passes an examination by the step (b).
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29. A program distribution method, comprising:
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(a) receiving a source file of a program sent from a source file sending device through a network;
(b) examining the source file received by the step (a);
(c) generating an execution file of the program from the source file examined by the step (b), when the source file passes an examination by the step (b);
(d) encrypting at least a part of the execution file by using a prescribed secret key, when the source file passes an examination by the step (b);
(e) receiving a public key which is either unique to an execution file receiving device or unique to a processor of the execution file receiving device, from the execution file receiving device through the network, when the source file passes an examination by the step (b);
(f) encrypting the prescribed secret key by using the public key received by the step (e), when the source file passes an examination by the step (b); and
(g) sending the execution file encrypted by the step (d) and the prescribed secret key encrypted by the step (f) to the execution file receiving device, when the source file passes an examination by the step (b).
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30. A computer program product for causing a computer to function as an encrypted program distribution device, the computer program product comprising:
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first computer program codes for causing the computer to receive a source file of a program sent from a source file sending device through a network;
second computer program codes for causing the computer to examine the source file received by the first computer program codes;
third computer program codes for causing the computer to generate an execution file of the program from the source file examined by the second computer program codes, when the source file passes an examination by the second computer program codes;
fourth computer program codes for causing the computer to receive a public key which is either unique to an execution file receiving device or unique to a processor of the execution file receiving device, from the execution file receiving device through the network, when the source file passes an examination by the second computer program codes;
fifth computer program codes for causing the computer to encrypt at least a part of the execution file by using the public key received by the fourth computer program codes, when the source file passes an examination by the second computer program codes; and
sixth computer program codes for causing the computer to send the execution file encrypted by the fifth computer program codes to the execution file receiving device, when the source file passes an examination by the second computer program codes.
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31. A computer program product for causing a computer to function as an encrypted program distribution device, the computer program product comprising:
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first computer program codes for causing the computer to receive a source file of a program sent from a source file sending device through a network;
second computer program codes for causing the computer to examine the source file received by the first computer program codes;
third computer program codes for causing the computer to generate an execution file of the program from the source file examined by the second computer program codes, when the source file passes an examination by the second computer program codes;
fourth computer program codes for causing the computer to encrypt at least a part of the execution file by using a prescribed secret key, when the source file passes an examination by the second computer program codes;
fifth computer program codes for causing the computer to receive a public key which is either unique to an execution file receiving device or unique to a processor of the execution file receiving device, from the execution file receiving device through the network, when the source file passes an examination by the second computer program codes;
sixth computer program codes for causing the computer to encrypt the prescribed secret key by using the public key received by the fifth computer program codes, when the source file passes an examination by the second computer program codes; and
seventh computer program codes for causing the computer to send the execution file encrypted by the fourth computer program codes and the prescribed secret key encrypted by the sixth computer program codes to the execution file receiving device, when the source file passes an examination by the second computer program codes.
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Specification