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Originally Posted by TadW
If you haven't updated yet, here is how I would do it: - generate a new RSA keypair
- patch UsbUpdater with the new public key (so involves no code patching)
- replace UsbUpdater in cramfs.Fsk
- sign both cramfs.Fsk and cramfs.Rootfs using the new private key and insert results in checksum
- run the update
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Your unit would then reject updates from Sony.
The only clean fix for the USB Updater is to out a SHA-1 private key.