Computer file metadata segmentation security system

A computer program product comprising:

• one or more computer-readable storage media and program instructions stored on the one or more computer-readable storage media, the stored program instructions comprising:
• program instructions to identify transfers of a digital file between respective source devices and destination devices in a given group of devices;
• program instructions to generate, for each identified transfer, a unique identifier (UID) of the digital file;
• program instructions to instruct that information relating to each identified transfer be stored in a record associated with the digital file, wherein the information includes:
• (i) an identification of the source device of the transfer, (ii) an identification of the destination device of the transfer;
• and (iii) the generated UID of the digital file for the transfer;
• program instructions to identify that the digital file has been contaminated;
• and
• program instructions to determine that a first source device is not a source of the contamination based, at least in part, on a UID of the digital file for a transfer of the digital file from the first source device being the same as a UID of the digital file for a transfer of the digital file to the first source device.

A computer system, the computer system comprising:

• one or more computer processors;
• one or more computer readable storage medium;
• and
• program instructions stored on the computer readable storage medium for execution by at least one of the one or more processors, the stored program instructions comprising:
• program instructions to identify transfers of a digital file between respective source devices and destination devices in a given group of devices;
• program instructions to generate, for each identified transfer, a unique identifier (UID) of the digital file;
• program instructions to instruct that information relating to each identified transfer be stored in a record associated with the digital file, wherein the information includes:
• (i) an identification of the source device of the transfer, (ii) an identification of the destination device of the transfer;
• and (iii) the generated UID of the digital file for the transfer;
• program instructions to identify that the digital file has been contaminated;
• and
• program instructions to determine that a first source device is not a source of the contamination based, at least in part, on a UID of the digital file for a transfer of the digital file from the first source device being the same as a UID of the digital file for a transfer of the digital file to the first source device.