Complex sentence: A warez group known as 3DM, which claimed to have defeated the technology on December 1,2014, has suggested that Denuvo Anti-Tamper employs a "64-bit encryption machine" that requires cryptographic keys unique to the specific hardware of the installed system.
Split into simpler sentences: A warez group known as 3DM claimed to have defeated Denuvo Anti-Tamper on December 1,2014. The group suggested that the technology involves a "64-bit encryption machine" that requires cryptographic keys unique to the specific hardware of each installed system.