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View Source Code (https://github.com/Edgecast/ectoken)
The purpose of Token-Based Authentication is to provide a safeguard against hotlinkingRefers to the practice of leveraging content, typically an image, from a different web site without proper consent or authorization. with the purpose of ensuring accurate billing of content delivery. It achieves this goal by requiring requests to contain a token value that defines the criteria that a requester must meet before it can be served via the CDN. This criteria may identify authorized requesters by:
In addition to the above criteria, an expiration date may also be assigned to a token to ensure that a link only remains valid for a limited time period.
Token-Based Authentication only requires authentication for content requested via the CDN. It does not affect links that bypass the CDN by pointing directly to the origin server.