Abstract: A system for enabling a headless Bluetooth device to establish a secure connection with a peer device is disclosed. The system includes the Bluetooth device configured for sending encrypted predefined first data to the peer device. The peer device is configured for receiving the data and sending it along with a predefined second data to a server, which comprises a second user confirm value. The server configured for receiving the data from the peer device and processing it for authenticating the received data and, on successful authentication, sending it to the peer device. The peer device is configured for receiving the data and sending it to the Bluetooth device and the Bluetooth device is configured processing it for authenticating the received data and, on successful authentication, bonding and communicating securely with the peer device.

Abstract: A method for consensus for creating new blocks in a blockchain is disclosed. A random timeout message is sent, by each node to each other peer privileged nodes participating in creating new blocks. Each privileged node computes a first wait time comprising a random timeout value and a random nonce from each of the random timeout message it receives. The first n timeout values from the lowest to the highest, n being equal to two-thirds the total privileged nodes are chosen and indexed. The timeout value at the computed triggers a timer. The node to time out first reveals all the random timeout messages received from its peers and sends the new block. Each peer privileged node validates the signatures of each random timeout message, calculates the timeout value and validates the first timeout. If successful, the new block is accepted and appended to the blockchain.

Abstract: A mechanism for registering a device with an Internet of Things (IoT) edge network is disclosed. The manufacturer of the device stores credentials of the device in a secure storage of the device. The manufacturer also stores the credentials on a public blockchain with sensitive parameters hashed or encrypted. A certifying node accesses the credentials from the public blockchain to establish a secure connection with the device and to verify its credentials. The device sends the credentials to the certifying node, only if the certifying node is able to decrypt a device access parameter from the public blockchain. Upon verifying the credentials of the device, the certifying node issues a digital certificate to the new device and it is stored on a permissioned blockchain within the IoT network. Other nodes in the IoT network may use the digital certificate on the permissioned blockchain for secure communication with the device.

Abstract: A receiver for receiving OFDM signals with a channel estimation means is disclosed. The channel estimation means estimates the channel at pilot locations by least squares estimation at pilot locations in subcarriers that include pilot symbols. Using the estimates of the channel at pilot locations, it estimates the channel for each subcarrier containing the pilot symbols, using linear interpolation. It estimates the channel for the sub-frame by interpolating the channel estimates estimated for the sub-carriers including the pilot locations, by using Minimum Mean Square Estimation that uses an auto-covariance matrix. An auto-covariance matrix generator generates the auto-covariance matrix. It generates an auto-covariance matrix based on, an extended cyclic prefix, an estimate of the channel in the time domain estimated by performing an Inverse Discrete Fourier Transform on the channel estimated as above and an average tap power calculated based on the estimate of the channel in the time domain.

Abstract: A method for encoding K bits of data, wherein K is a multiple of N is provided. The method includes a first step of mapping N consecutive bits of the K bits of data, starting from either its least significant bit or its most significant bit, to a point within a quadrant out of 2N quadrants of an N-dimensional space. The method includes a second step of mapping the subsequent contiguous N consecutive bits of the K bits of data, to a point within a sub-quadrant out of 2N quadrants of the N dimensional space within the previous quadrant. The method includes repeating the second step until all K bits of data have been mapped. The method includes a third step of obtaining N coordinate values of N consecutive bits of the data mapped last, wherein the N coordinate values represent the encoded code word for the K bits of data.