Industrial Automatic Control Systems and Controllers Annotation << Back On the Impact of Transient Processes in Long Computer Lines on Their Security Against Confidential Information Leakage Kravchenko V.B., Beletskiy S.A., Shukenbaev A.B. This article examines the impact of technological changes on the design of computer platforms and their effectiveness in terms of energy and information security. It is shown that any connection between logic elements should be considered a long line if the signal propagation time along this connection exceeds 0.1 of the clock duration. At clock frequencies of tens of megahertz, the spatial length of a clock was several meters. At a clock frequency of 500 MHz, the spatial length of the path is approximately 40 cm. It is necessary to either limit the conductor connection length to a few centimeters or ensure matched line operation. The aggravation of the situation with the use of matched long lines has complicated the task of suppressing PEMI. In fact, in computer technology built on a modern component base, with the current interface structure, practically only PEMI associated with signals transmitted along matched long lines are detectable, including through modulation of the radiation of other elements. Several possible approaches to combating these phenomena are considered. Keywords: Information security, PEMI, long lines, confidential information leakage, clock frequency. DOI: 10.25791/asu.11.2025.1624 Pp. 33-38.