The community maintains strict databases of these hashes. For example, the legitimate 3.60 PUP file must match a specific code. If the file is even one byte different (a "patched" file containing malicious code), the Vita’s security will often reject it, but occasionally, modified system files can cause irreparable damage.
Darthsternie's Firmware Archive: A standard community source for every version of Vita firmware. psvupdatpup download patched
Technical considerations
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