Method and Apparatus for Facilitating Secure Distributed Content Delivery
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Abstract
One embodiment of the present invention provides a system that facilitates receiving content from a primary peer and forwarding it to a secondary peer, wherein blocks of the content are sent to the secondary peer prior to all of the blocks of the content being received from the primary peer. The system starts by receiving an encrypted list of checksums from a server, wherein each checksum in the list is associated with a corresponding block of the content. Next, the system decrypts the encrypted list of checksums to form a list of decrypted checksums. The system then receives a block of the content from the primary peer and calculates a checksum for the block of the content. The system subsequently compares the calculated checksum with a corresponding checksum from the list of decrypted checksums received from the server. If the calculated checksum matches the corresponding checksum, the system sends the block of the content to the secondary peer.
52 Citations
54 Claims
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1-40. -40. (canceled)
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41. A method for serving data to a peer, comprising:
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receiving a list of checksums from a server, the list of checksums corresponding to a plurality of checksums associated with a plurality of blocks of content forming a file; receiving a block of content from a first pee; determining whether the block is valid by comparing a checksum of the block with a checksum from the list of checksums; when the block is validated, making the block available to a second peer, prior to competing download of the file. - View Dependent Claims (42, 43, 44, 45, 46, 53)
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47. A method for publishing content in a distributed content delivery network, comprising:
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receiving content for publication; dividing the content into a plurality of blocks; calculating a checksum for each of the plurality of blocks; encrypting a file including the calculated checksums to form an encrypted file with a list of the calculated checksums; signing the encrypted file with a private key.
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48. The method of claim 48, further comprising:
receiving a request for the encrypted file, the request including a public key of a requesting peer, and encrypting the list of the calculated checksum with the public key of the requesting peer.
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49. An apparatus comprising:
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a receiving mechanism to receive an encrypted list of checksums from a server, wherein each checksum in the list is associated with a corresponding block of content; the receiving mechanism further to receive a block of the content from a first peer; a calculation mechanism to calculate a checksum for the block of content received from the first peer; a comparison mechanism to compare the calculated checksum with a corresponding checksum from the list of decrypted checksums; and a delivery mechanism to make the block of content available to a second peer, if the comparison mechanism successfully validates the block of content. - View Dependent Claims (50, 51, 52, 54)
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Specification