Delta Android — Keysystem ((install))

adb shell dumpship keystore

The emerges at step 3. In an AOSP generic build, the keymaster might allow 1024-bit RSA keys. In a Delta Keysystem (e.g., Xiaomi’s MIUI-enhanced Keymaster), the minimum key length might be 2048 bits, and ECC curve P-384 might be enforced over P-256. Delta Android Keysystem

More cryptographically, "Delta" can describe a mechanism where a base master key is combined with a (a user ID, package name, or timestamp) to derive a unique child key. This is common in: adb shell dumpship keystore The emerges at step 3

By linking the key to a specific device ID, the system prevents unauthorized clones or "cracked" versions of the APK from functioning. Step-by-Step: How to Get a Delta Android Key Xiaomi’s MIUI-enhanced Keymaster)