System for distributing nameless objects using self-certifying names
View Patent ↗A content replication system can cache nameless Content Object across multiple replica servers in a Content Centric Network (CCN). During operation, a CCN client can obtain a nameless Content Object from one or more content-hosting services by disseminating an Interest for a data collection, and receives a Content Object that includes a manifest for the data collection. The manifest can include Content Object hash (COH) values for a set of other Content Objects of the data collection. The client then determines a name prefix for a content-hosting service that hosts the data collection, and generates another Interest for a Content Object of the data collection. This Interest's name includes the name prefix for the content-hosting service, and also includes a COH value for the respective Content Object. The client disseminates the new Interest over CCN to obtain the respective Content Object of the data collection.
1. A computer-implemented method, comprising:
disseminating an Interest for a data collection;
receiving a Content Object that includes a manifest for the data collection, wherein the manifest includes Content Object hash (COH) values for a set of other Content Objects of the data collection;
determining a name prefix for a content-hosting service that hosts at least a portion of the data collection;
generating a second Interest for a respective Content Object of the data collection, wherein a name for the second Interest includes the name prefix for the content-hosting service, does not indicate a name for the respective Content Object, and includes a COH value for the respective Content Object;
disseminating the second Interest to obtain the respective Content Object of the data collection; and
verifying the obtained respective Content Object by determining that a computed hash of the respective Content Object matches the COH value included in the name for the second Interest.
2. The method of claim 1 , wherein the other Content Objects of the data collection do not include a name, and are accessed based on their Content Object hash value.
3. The method of claim 1 , wherein the manifest includes a root manifest that specifies a name prefix for one or more content-hosting services that host at least a portion of the data collection.
4. The method of claim 3 , wherein the root manifest includes a signature for the root manifest.
5. The method of claim 3 , wherein determining the name prefix for the content-hosting service involves obtaining the name prefix from the root manifest.
6. The method of claim 1 , wherein the manifest includes a non-root manifest.
7. The method of claim 6 , wherein the non-root manifest does not include a name.
8. The method of claim 6 , wherein the non-root manifest does not include a signature for the non-root manifest.
9. The method of claim 6 , wherein obtaining the name prefix for the content-hosting service involves obtaining the name prefix from a root manifest associated with the data collection.
10. The method of claim 1 , wherein the other Content Objects of the data collection include a set of non-root manifests, or a set of data Content Objects.
11. A non-transitory computer-readable storage medium storing instructions that when executed by a computer cause the computer to perform a method, the method comprising:
disseminating an Interest for a data collection;
receiving a Content Object that includes a manifest for the data collection, wherein the manifest includes Content Object hash (COH) values for a set of other Content Objects of the data collection;
determining a name prefix for a content-hosting service that hosts at least a portion of the data collection;
generating a second Interest for a respective Content Object of the data collection, wherein a name for the second Interest includes the name prefix for the content-hosting service, does not indicate a name for the respective Content Object, and includes a COH value for the respective Content Object;
disseminating the second Interest to obtain the respective Content Object of the data collection; and
verifying the obtained respective Content Object by determining that a computed hash of the respective Content Object matches the COH value included in the name for the second Interest.
12. The storage medium of claim 11 , wherein the other Content Objects of the data collection do not include a name, and are accessed based on their Content Object hash value.
13. The storage medium of claim 11 , wherein the manifest includes a root manifest that specifies a name prefix for one or more content-hosting services that host at least a portion of the data collection.
14. The storage medium of claim 13 , wherein the root manifest includes a signature for the root manifest.
15. The storage medium of claim 13 , wherein determining the name prefix for the content-hosting service involves obtaining the name prefix from the root manifest.
16. The storage medium of claim 11 , wherein the manifest includes a non-root manifest.
17. The storage medium of claim 16 , wherein the non-root manifest does not include a name.
18. The storage medium of claim 16 , wherein the non-root manifest does not include a signature for the non-root manifest.
19. The storage medium of claim 16 , wherein obtaining the name prefix for the content-hosting service involves obtaining the name prefix from a root manifest associated with the data collection.
20. The storage medium of claim 11 , wherein the other Content Objects of the data collection include a set of non-root manifests, or a set of data Content Objects.
21. A computer-implemented method, comprising:
receiving, by a server of a content-hosting service, an Interest whose name includes a name prefix for the content-hosting service, and also includes a Content Object hash (COH) value for a Content Object hosted by the content-hosting service;
obtaining the Content Object whose hash matches the COH value; and
returning the Content Object, along a face from which the Interest was received, to satisfy the Interest.
22. The method of claim 21 , wherein the Content Object does not include a name.
23. The method of claim 21 , wherein the Content Object does not include a signature.
24. The method of claim 21 , wherein the Content Object includes one or more of:
metadata; and
a payload.
25. The method of claim 21 , wherein the Content Object includes a manifest for a data collection, wherein the manifest includes COH values for a set of other Content Objects of the data collection.