Proxy services for controlling the persistency, utilization, and dissemination of information provided to a service worker

A system comprising:

• at least one hardware processor;
• and
• one or more computer storage media having executable instructions embodied thereon, which, when executed by the at least one hardware processor, cause the at least one hardware processor to perform operations comprising:
• receiving, at a security service, a response from a second computing device that includes response data addressed to a first computing device;
• identifying, at the security service, sensitive data included in the response data, the response further including caching instructions that instruct a service worker to cache the sensitive data at the first computing device;
• in response to identifying the sensitive data, updating, at the security service, the caching instructions to form updated caching instructions that instruct the service worker to exclude the sensitive data from caching at the first computing device;
• in response to identifying the sensitive data, including, in an updated response, sandbox instructions that instruct the service worker to isolate the sensitive data in a sandbox implemented at the first computing device;
• and
• transmitting, from the security service to the first computing device, the updated response that includes the response data and the updated caching instructions.

Computer storage media storing computer-useable instructions that, when used by at least one computing device, cause the at least one computing device to perform actions comprising:

• receiving, at a security service, a response from a second computing device that includes response data addressed to a first computing device;
• identifying, at the security service, sensitive data included in the response data, the response further including caching instructions that instruct a service worker to cache the sensitive data at the first computing device;
• in response to identifying the sensitive data, updating, at the security service, the caching instructions to form updated caching instructions that instruct the service worker to exclude the sensitive data from caching at the first computing device;
• in response to identifying the sensitive data, including, in an updated response, sandbox instructions that instruct the service worker to isolate the sensitive data in a sandbox implemented at the first computing device;
• and
• transmitting, from the security service to the first computing device, the updated response that includes the response data and the updated caching instructions.