A system, apparatus, method, and machine readable medium are described for sharing authentication data. For example, one embodiment of a method comprises: generating and storing a persistent group identification code (Group-ID) for a group of authenticators sharing a common set of authorization (Uauth) keys, an initial Group-ID to be generated on a first use of a first authenticator and/or following a factory reset of the first authenticator generating and storing an individual asymmetric wrapping key encryption key (WKEK) on a first use of the first authenticator and/or following each factory reset of the first authenticator; generating and storing a symmetric wrapping key (WK), the wrapping key to be generated on a first use of the first authenticator and/or following each factory reset of the first authenticator; generating a join-block using an authenticator identification code for the first authenticator and the WKEK, the join-block usable to join an existing authenticator group, the join block to be sent to a second authenticator; verifying the join-block at the second authenticator and generating a join response block responsive to user approval, the join response block generated by encrypting the WK and Group-ID using the WKEK, the join response block to be transmitted to the first authenticator; and decrypting the join response block and storing the WK and Group-ID.