[conite]

The ROT is the only thing that could be remotely considered exclusive to Blackberry Limited-licensed implementations.

BlackBerry Limited absolutely licenced their flavour of Android.

There are a multitude of things they did to AOSP, beyond kernel hardening, through the entire software stack - all deeply embedded code.

"BlackBerry devices powered by Android lock the boot media and the primary boot loader to load only the BlackBerry security shim.

The BlackBerry security shim resides between the primary and secondary boot loaders. It verifies the cryptographic signature on the secondary boot loader (using ECC-521 and SHA-512) and enforces downgrade prevention. It’s located in the primary boot partition of the eMMC and is write-protected.

BlackBerry Secure Compound provides a trusted environment for the secure boot process, for the storage of sensitive data like keys and the device password, and for the execution of trusted apps like BlackBerry Integrity Detection.

BlackBerry Integrity Detection continuously monitors BlackBerry devices powered by Android for events or configuration changes that could indicate a compromise to security. This includes validating that unauthorized apps haven’t acquired escalated privileges (for example, rooting), performing checks on the integrity of the kernel, monitoring file system mounting permissions, unauthorized changes to the SELinux policy, and the disabling of security sensitive applications such as pathtrust. EMM and other third-party monitoring solutions can integrate with BlackBerry Integrity Detection to request integrity reports to monitor for device compromises.

BlackBerry enhances the security of Android full-disk encryption by using a FIPS 140-2 compliant Certicom/ BlackBerry Cryptographic Kernel, encrypting user data using AES-128 (AES-CBC-ESSIV:SHA-256), and protecting the key within BlackBerry Secure Compound."

[Chuck Finley69]

I’m shocked nothing has broken yet.....

[Thud Hardsmack]

That's not what you said - you're confusing people.

Google hasn't historically charged for Android and its apps because of the revenue brought in through Chrome and search. The base Android operating system will remain free and open-source. -If phone and tablet manufacturers want Google's apps and the Play Store, they'll have to pay a license fee in Europe.

What you need to specify is BlackBerry license BB10 for free in the same way as Google does with Android, since BlackBerry is also licensing their own custom version of Android for manufacturers.