This paper outlines the purpose, functionality, and importance of shsh.host, a vital tool in the Apple device jailbreaking and firmware restoration community. Understanding SHSH Host: A Guide to Saving Signing Blobs Executive Summary
Active Signing: Apple only "signs" (allows) the latest version of iOS. shsh host
Are you looking to learn more about a specific jailbreak tool or how to use these blobs to downgrade? This paper outlines the purpose
Saving Blobs: To save your blobs, you typically need your device's ECID (a unique ID). You can find this using tools like iTunes, 3uTools, or the System Info tweak for jailbroken devices. and importance of shsh.host