CryptoRF® is an ideal solution given its ability to authenticate using a contactless interface.  Additionally, it securely stores data on the tag, and comes in a variety of form factors.  The contactless design eliminates concerns about dirty or worn contacts causing read errors, and reduces concerns with vandals damaging contact card readers. As mentioned in previous example, CryptoCompanion™ can be implemented on the host-side for protected key storage. Additionally, Microchip’s Crypto RF Reader IC makes the design of the lock or host easy with guaranteed compatibility, complete reference designs, and readily available development kits.