Standard RIF files are binary files (512 bytes). In the early days of Vita hacking, sharing these files was cumbersome.

: zRIF keys are exceptionally long. Ensure you copied the entire string without missing characters at the beginning or end. 2. C1-2741-4 Error on PS Vita Hardware

In the early days of PS Vita hacking (around 2016), tools like and MaiDumpTool were used to dump games. These tools worked by decrypting the game's executables while they were loaded in the Vita's RAM and stripping the DRM away entirely. However, this method had massive downsides:

This string can be easily pasted into spreadsheet databases or configuration files.

A zipped/compressed format of the RIF data converted into a readable text string (usually looking like a long, random sequence of alphanumeric characters).

The Ultimate Guide to PS Vita zRIF Keys: What They Are and How to Use Them

A is simply a standard RIF license file that has been compressed and encoded into a text string using zlib compression and Base64 encoding . Why text strings instead of files?

You could not update these games through the official PlayStation Network (PSN) servers.

If you wish to obtain a zRIF key for a game you legally own, follow this practical guide.

The site supplying most of the MP3 files to the Red Hot Jazz Archive pages on Syncopatedtimes.com is down and many links no longer work. You may find the original Redhotjazz.com and download all of the original RealMedia .ra music files on the WayBackMachine at Archive.org. 

https://web.archive.org/www.redhotjazz.com