A Reversible Collapsible Security Pouch for Electronic Devices. The Pouch is provided in a variety of different configurations, and further are designed to accommodate a variety of different items. A key-fob-accommodating version is small enough to be attachable to the key fob when in a compacted condition so that it can always be attached to the key fob. The key fob version includes a pair of stretchable wrapping loops that allows the user to roll the pouch into a compact roll and then secure it in the rolled condition using one of the wrapping loops. In some larger pouch versions, there may be closure buttons around which a wrapping loop could be wrapped to secure the closure of the pouch. Other versions may include the ability to close and lock the pouch to secure the encapsulated device. All versions include a Faraday cage integrated into the pouch assembly.