S.D. Codified Laws § 53-12-21
Current with legislation signed by the governor on or before 3/6/2024
An electronic record or electronic signature is attributable to a person if it was the act of the person. The act of the person may be shown in any manner, including a showing of the efficacy of any security procedure applied to determine the person to which the electronic record or electronic signature was attributable.
SDCL 53-12-21