- The channel debated the trade-offs of closed-source “secure elements” versus open-source alternatives, questioning whether the security benefits of proprietary secure hardware justify the loss of transparency and auditability.  
- Participants asked how much of the Java Card smart-card ecosystem is actually open-source, highlighting ongoing concerns about the openness of widely-used secure-element platforms.  
- A transcript of the 29 June 2019 Austin Bitcoin Developers meetup on hardware wallets was posted to the diyhpluswiki, providing a reference for current thinking on open hardware wallet design and the role of secure elements.