On older devices (A4 and some A5 chips), the "nonce" (a random number generated during the restore process to prevent replay attacks) was static or easily predictable. This meant you could save blobs today and use them years later.
If you prefer having your blobs stored on a remote server (similar to the SHSH Host model), is the most robust alternative currently available. shsh host alternative
SHSH blobs are unique digital signatures that Apple uses to verify firmware installs. Once Apple stops "signing" a version, you normally cannot install it—unless you have previously saved these blobs. If the primary SHSH Host website is down or fails to recognize a newer device like the A12+ series, you need another way to secure these "digital keys". Top SHSH Host Alternatives 1. TSS Saver (1conan) On older devices (A4 and some A5 chips),
The most direct replacement for Cydia’s SHSH host is (created by u/1Conan). SHSH blobs are unique digital signatures that Apple
In the past, blobs were everything. If you had the blob, you could downgrade. Today, even with a valid blob saved via the best alternatives, you may not be able to downgrade.