Identifying and blocking prohibited content items in a content management system

A system comprising:

• a processor;
• and
• a memory containing instructions that, when executed by the processor, cause the processor to:
• receive a content item request associated with a first content item;
• determine a request type corresponding to the first content item request;
• generate a first content item fingerprint from the first content item, the first content item fingerprint identifying the first content item;
• deny the content item request when the first content item fingerprint is included in an assignment blacklist when the request type is determined to be an assignment request;
• and
• deny the content item request when the first content item fingerprint is included in a sharing blacklist when the request type is determined to be a share request.

A non-transitory computer-readable medium that, when executed by a computing device, causes the computing device to:

• receive a content item request associated with a first content item;
• determine a request type corresponding to the first content item request;
• generate a first content item fingerprint from the first content item, the first content item fingerprint identifying the first content item;
• deny the content item request when the first content item fingerprint is included in an assignment blacklist when the request type is determined to be an assignment request;
• and
• deny the content item request when the first content item fingerprint is included in a sharing blacklist when the request type is determined to be a share request.