Abstract: A device can (i) store public keys Ss and Sn for a network and (ii) record private key sd. A network can record a corresponding private keys ss and sn. The device can (i) generate a device ephemeral PKI key pair (Ed, ed) and (ii) send public key Ed to the network. The device can receive an ephemeral public key Es from the network. The device can calculate values for A: an elliptic curve point addition over Ss, Sn, and Es, and B: (sd+ed)mod n. The device can input values for X and Y into an elliptic curve Diffie Hellman key exchange (ECDH) in order to determine a mutually derived shared secret X5, where the network can also derive shared secret X5. The device can (i) use X5 to derive a key K2 and (ii) decrypt a ciphertext from the network using key K2.

Abstract: A server can record a device static public key (Sd) and a server static private key (ss). The server can receive a message with (i) a device ephemeral public key (Ed) and (ii) a ciphertext encrypted with key K1. The server can (i) conduct an EC point addition operation on Sd and Ed and (ii) send the resulting point/secret X0 to a key server. The key server can (i) perform a first elliptic curve Diffie-Hellman (ECDH) key exchange using X0 and a network static private key to derive a point/secret X1, and (ii) send X1 to the server. The server can conduct a second ECDH key exchange using the server static private key and point X0 to derive point X2. The server can conduct an EC point addition on X1 and X2 to derive X3. The server can derive K1 using X3 and decrypt the ciphertext.

Abstract: A network can operate a WiFi access point with credentials. An unconfigured device can support a Device Provisioning Protocol (DPP), and record bootstrap public keys and initiator private keys. The network can record bootstrap public and responder private keys and operate a DPP server. A responder proxy can establish a secure and mutually authenticated connection with the network. The network can (i) derive responder ephemeral public and private keys, (ii) record the initiator bootstrap public key, and (iii) select a responder mode for the responder. The network can derive an encryption key with at least the (i) recorded the initiator bootstrap public key and (ii) derived responder ephemeral private key. The network can encrypt credentials using at least the derived encryption key and send the encrypted credentials through the responder proxy to the initiator, which can forward the encrypted credentials to the device, thereby supporting a device configuration.