The growth of technology has created an expansion in the fields of knowledge which are the subject of ‘expert evidence’ in the Australian courts.
Experts are now regularly called upon to give opinions about advancing technologies including encryption, and digital innovations like Bitcoin.
While witnesses can only generally testify about their personal observations, expert witnesses are permitted to express opinions derived from their field of expertise.
Expert opinions
Section 79 of the Evidence Act 1995 (NSW) provides that:
(1) If a person has specialised knowledge based on the person’s training, study or experience, the opinion rule does not apply to evidence of an opinion of that person that is wholly or substantially based on that knowledge.
The case of Clark v Ryan [1960] HCA 42 allows for expert opinions
in respect of fields that are “… such that inexperienced persons are
unlikely to prove capable of forming a correct judgment upon it without such assistance.”
Bitcoin as an emerging field
Created by underground technology enthusiasts in 2008, Bitcoin is a digital currency which operates between individual users, without control or interference by central banks or the state. Bitcoin-to-Bitcoin transactions are made by digitally exchanging anonymous, heavily encrypted codes across peer-to-peer (P2P) networks.
In 2015, 65{9cdd3996075497a6cb8707ccc1cea22a264fdf1d767a773e38e77302ef11f9ba} of the US general public was “not at all familiar” with Bitcoin. Of those who were aware, 84{9cdd3996075497a6cb8707ccc1cea22a264fdf1d767a773e38e77302ef11f9ba} had never used the currency. Of 3,148 Australians surveyed in April 2015, only one in three had any idea of what Bitcoin was. In 2014, about 1000 Australian businesses accepted … Read More