The UNSC Priority Transmission 09872H-98 was a message sent from Ysionris Jeromi to Catherine Halsey March 9, 2525. It featured an extremely complex encryption scheme, with an Encryption Code of red. The Public Key was File/excised access Omega/. The subject was titled "Mitigating factors and relative biological risks associated with queried experimental medical procedures." It was classified as Restricted by the BGX Directive. The message itself warned of the danger possible in the "hypothetical" physical augmentation process.