Abstract: A computer-implemented method and system for managing digital evidence using a blockchain. The method comprises receiving an evidence data file, the evidence data file being identified by: an evidence identifier, and a hash code computed from the evidence data file; generating a block for the blockchain by combining data indicative of: a hash of a previous block in the blockchain, the evidence identifier, and the hash code computed from the evidence data file; and storing the generated block as a new block in the blockchain, wherein the method further comprises: outputting at least part of the data in the blockchain in response to a user request to enable a user to verify the authenticity of the evidence data file using the data in the blockchain.

Abstract: A computer-implemented method for processing digital evidence, the method comprising: storing a digital media file (4); in response to a request from a first user to access the digital media file (4): redacting a first portion of content from a copy of the digital media file (4) to produce a first redacted digital media file (10); and providing the first redacted digital media file (10) to the first user; and in response to a request from a second user to access the digital media file (4): redacting a second portion of content from a further copy of the digital media file (4) to produce a second redacted digital media file (11), wherein the second portion of content is at least partly different from the first portion of content; and providing the second redacted digital media file (11) to the second user, such that the first and second users are provided with copies of the digital media file (4) that are redacted differently from one another.

Abstract: A computer-implemented method and system for managing digital evidence using a blockchain (12). The method comprises receiving an evidence data file (5), the evidence data file (5) being identified by: an evidence identifier, and a hash code computed from the evidence data file (5); generating a block (11) for the blockchain (12) by combining data indicative of: a hash of a previous block (13) in the blockchain (12), the evidence identifier, and the hash code computed from the evidence data file (5); and storing the generated block (11) as a new block in the blockchain (12), wherein the method further comprises: outputting at least part of the data in the blockchain (12) in response to a user request to enable a user to verify the authenticity of the evidence data file (5) using the data in the blockchain (12).