The blog post discusses two methods for securely and quickly sending large files: Magic Wormhole and Tailcat. Magic Wormhole is user-friendly and suitable for novices, though slower, with a transfer speed of about 5 MB/sec. Tailcat, built using Tailscale technology, offers faster transfers of around 20 MB/sec but is less intuitive. Both tools ensure file encryption and are useful for sending files across different networks.