To quote: This release is a tool that will decrypt (and then also re-encrypt) the SIG files that were leaked in the CEX-DEX packages earlier this year and also the files released by an0nymous a month or so ago. The SIG files have not gotten a lot of attention, maybe because no one could read them. However, that's about to change.
Why should you care about this release?
Because the SIG files are a list of instructions for the objective suites application to interface to the lv2diag.self files that were leaked with the previous Objective Suites stuff. Very low level stuff, for the most part, that will actually let you modify settings in the PS3 firmware.