A cardiac rhythm management system includes an implantable medical device capable of delivering cardiac therapy and sensing an EGM. The pelvic brace includes a plurality of bracing elements that can at least in part be wrapped around or about the pelvic region of a patient. The interest in having a device of this type is, for example, to protect chip cards and other cryptosystems from attacks via auxiliary channels such as collision attacks by and attacks by differential analysis of current, power or consumption.