This article explains how these license keys work, what features they enable, and how to manage them across different generations of Fujitsu servers (S4, S5, S6). What is the Fujitsu iRMC?
: Fujitsu uses a specific encryption method for its keys. For example, in iRMC S4, the license is generated using an HMAC-SHA1 hash (based on a static message and key), which is then used as an AES-128 key to encrypt the license data before being base32 encoded. Feature Activation fujitsu+irmc+license+key+work