Ix Decrypt

: The algorithm applies a modular exponentiation formula. If the public key is used to "lock" the data (Step VIII), the private key is used to "unlock" it here.

It almost always points to:

Many of these projects, like bagbak, are clearly marked as deprecated but remain useful for older iOS versions. Ix Decrypt

Here's what you need to know about the Decrypt method: : The algorithm applies a modular exponentiation formula