BLOCKCHAIN BASED DIGITAL EVIDENCE COLLECTION USING IMPROVED FUZZY HASHING

Preservation of the sources that we collect during an investigation
where a cyber crime happens is essential. Digital evidences are should be
taken into consideration. These include from various sources like computer,
Mobile phone, hard drives, etc. Most digital information is volatile and can be
easily tampered. Once a small change happens, it is usually difficult to detect
changes or to reverse the data back to its original data. If such evidence gets
tampered, truth is subjected to change.

Through Blockchain technology, one set of data is cryptographically
hashed with other and ensures immutability. But blockchain alone to encrypt
these data’s can be challenging when several sets of data are having these
enough match. Once it is encrypted it is difficult to modify or change. It is
essential to locate and find comparable files. The new paradigm employs the
encrypting IOT devices data or any digital evidence by means of hashing in
Blockchain. This paper presents an improved blockchain based IOT data
device data encryption by fuzzy hash values to construct a combination of
Merkle Patricia tree that enables identification of almost similar data and helps
to verify authenticity