Method and system for handling sensitive data in a content delivery network

摘要

Using cryptographic techniques, sensitive data is protected against disclosure in the event of a compromise of a content delivery network (CDN) edge infrastructure. These techniques obviate storage and/or transfer of such sensitive data, even with respect to payment transactions that are being authorized or otherwise enabled from CDN edge servers.

主权项

1. Apparatus, comprising:
a hardware processor; computer memory holding computer program instructions that when executed by the hardware processor perform a set of operations under the control of configuration data that includes one or more keys, each key in the configuration data being a public key of a cryptographic key pair associated with one of a set of issuing entities, the public key having an associated secret key that is available at a computing entity distinct and remote from the apparatus, the set of operations comprising:
receiving a message body that includes sensitive data, the message body being a component of a message directed to a third party domain;determining an identity of an issuing entity associated with the sensitive data;parsing the message body to extract at least a portion of the sensitive data;applying to the portion of the sensitive data extracted the public key of the issuing entity whose identity was determined to generate a value V;discarding the portion of the sensitive data extracted;determining whether the value V is associated with an identifier W associated with a third party domain;in response to determining that the value V is associated with an identifier W associated with the third party domain, retrieving a token T that associates (V,W) and forwarding the message including the token onward to the third party domain;in response to determining that the value V is not associated with an identifier W associated with the third party domain, generating a new token that associates (V,W) and forwarding the message including the new token onward to the third party domain;receiving a response from the third party domain that includes the token or the new token previously forwarded with the message; in response to receiving the response from the third party domain, retrieving the value V and issuing a new request to the computing entity at which the secret key is available, the new request including the value V; and receiving a response from the computing entity indicating that a transaction associated with the sensitive data is authorized to proceed, the computing entity having applied the secret key to the value V to identify the sensitive data.