The IEEE Microelectronics Design & Test Symposium (MDTS) provides a forum for academic and industry researchers and engineers to discuss the latest advances in microelectronics, share their visions in modern microelectronic technologies, and foster academic-industry collaboration. The 34th MDTS explores challenges and advances on two major fronts: chiplets and hardware security. Chiplets break large chip designs into smaller, ideally reusable, blocks, and the Universal Chiplet Interconnect Express (UCIe) standard addresses the challenges of connecting chiplets in the package. Hardware security for chip designs covers a broad range of issues, from preventing reverse engineering to blocking takeovers and data theft or manipulation. General Chair: Andrew Laidler, onsemi (alaidler@ieee.org) Vice General Chair: Uma Srinivasan, IBM (umasrin@us.ibm.com) Past General Chair: Kelly Ockunzzi, Marvell Semi (kockunzzi@marvell.com) Program Chair: Tian Xia, University of Vermont (txia@uvm.edu) Vice Program Chairs: Huamin Li, University at Buffalo–SUNY; Marvin Onabajo, Northeastern University Special Session Chairs: Nathaniel Cady, University at Albany–SUNY; Deniz Rende, Rensselaer Polytechnic Institute; Dean Sullivan, University of New Hampshire