- Bryan Bishop live-documented the 29 June 2019 Austin Bitcoin Developers meet-up, producing a detailed transcript on DIYhpl.us covering hardware-wallet security, physically unclonable functions, Schnorr/Shamir secret-sharing schemes, and the implications of BIP-Tapscript’s removal of CHECKMULTISIG.  
- nmz787_ discussed operating a focused-ion-beam (FIB) system that steers gallium ions with electrostatic—not electromagnetic—fields for nanoscale machining and maskless lithography.  
- nmz787_ also reported owning an unused scanning-electron microscope (SEM) acquired four years earlier, now slated for refurbishment “this summer,” and expressed interest in coupling custom-built STM/SEM electronics to micro- or nano-fluidic channels prototyped with the FIB.  
- docl suggested replicating dberard’s open-source scanning-tunneling-microscope design (https://dberard.com/home-built-stm/) as a non-destructive imaging complement to FIB work.  
- fenn noted that CMOS transients can emit faint photons when switching states, a phenomenon relevant to side-channel attacks and optical probing of secure hardware.  
- fenn criticized the “halfway open-source” status of Java Card secure elements, highlighting ongoing frustration with proprietary secure-hardware ecosystems.