Generates and certifies a key pair this service decrypts with (a federation relationship's encryption key).
Differs from a signing leaf in its key usage, use: enc and kid prefix.
use: enc
the realm
as issueSigningKeyPair(); keyAlg one of ENCRYPTION_KEY_ALGS
issueSigningKeyPair()
keyAlg
ENCRYPTION_KEY_ALGS
a promise of issueSigningKeyPair()'s answer
Generates and certifies a key pair this service decrypts with (a federation relationship's encryption key).
Differs from a signing leaf in its key usage,
use: encand kid prefix.