We've seen
PS4 UserModules Decryption,
PS4 EBOOT / SPRX Decryption,
PS4 Game PKG Decryption and
PS4 PUP Update Decryption leading up to PlayStation 4 developer
@zecoxao's latest
Twitter hint on
sceSblAuthMgrAuthHeader.
Before you ask (like I was about to

),
@LightningMods has us covered in the
PSXHAX Shoutbox reminding us that
previously developer
CTurt blogged about it briefly in his
Hacking the PS4: Part 2 Userland code execution analysis.
To quote:
Executable files with kernel access
The following two kernel functions seem to deal with the majority of integrity checks of executable files:
sceSblAuthMgrAuthHeader and
sceSblAuthMgrIsLoadable.
With kernel code execution, executable files can be directly decrypted on the console, however there isn't much benefit to this over just loading the module and dumping it from userland.
And now we know, and knowing is half the battle... here's to hoping more great PS4 stuff is in the pipeline!

From
Pastebin:
Code:
ERROR: W:\Build\J00739801\sys\internal\modules\sbl\authmgr\authmgr_secure_module.c:verifyHeader(626) mail retval err -37
[KERNEL] ERROR: segment #3 of "/mnt/usb0/hello_world.elf" is not page aligned.
ERROR: found illegal segment header in /mnt/usb0/hello_world.elf.
In summary from
@zecoxao, it authenticates the PS4 self header before...