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This is a simple flashable zip used to remove firmware from the /firmware and /vendor partitions. This is necessary in order to remove untrusted proprietary code and to increase security. See https://bits-please.blogspot.com/2016/05/qsee-privilege-escalation-vulnerability.html for an exploit (CVE-2015-6639) that uses the Widevine firmware. To sign the zip ./build/tools/releasetools/sign_zip.py -k ../../Signing_Keys/releasekey deblob-firmware.zip deblob-firmware-signed.zip