Sony intentionally designed the PS4's security architecture to make downgrading impossible. The system software is not stored solely on the internal HDD. Critical components of the firmware are written to encrypted, read-only chips soldered directly onto the console's motherboard. These components keep a record of the installed firmware and cryptographically reject attempts to install any lower version.

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In 2016, a group of hackers and developers, known as "Specter," released a PS4 downgrade tool that exploited a previously unknown vulnerability in the console's firmware. This tool, also known as "Downgrade Tool" or "PS4 Downgrader," allowed users to downgrade their PS4's firmware from a newer version (e.g., 4.05) to an older version (e.g., 2.76 or 3.55).