The introduction of digital technologies in Kazakhstan is one of the results of the implementation of the State Programme ‘Digital Kazakhstan’ dated 12 December 2017, designed for the period 2017-2022. The main priorities of the named Programme were: financial and economic relations due to high social demand. At the same time, digitalisation, designed to free the administrative and management apparatus of the relevant financial and economic structures of the country from routine work, to guarantee the user not only the speed of operations, but also the reliability and protection of the database from unlawful access, turned out to be a real threat of illegal manipulation of big data databases. The existing methods of recognition of the facts of unauthorised intrusion into the field of digital technologies, developed by forensic practice, are quickly becoming obsolete due to the fact that criminals have a high ability of mimicry to any updated conditions and ways to protect digital technologies from criminal manipulation of them. Evidence in criminal cases requires the production of sophisticated expert research in the field of information and communication technologies.