Secure key design approaches using entropy harvesting in wireless sensor network: A survey

An Investigation of Using Loop-Back Mechanism for Channel Reciprocity Enhancement in Secret Key Generation

“…Key generation can exploit different properties of wireless channel, including received signal strength (RSS), channel phase, and CSI [22], [23]. RSS has been widely applied for key extraction in the practical implementation as it is readily available [2], [9], [24], [25], [26], [27], [28], [29], [30].…”

Nonreciprocity Compensation Combined With Turbo Codes for Secret Key Generation in Vehicular Ad Hoc Social IoT Networks

“…Different approaches have been published in the public domain in secure key extraction protocols with different strengths and limitations with regards to entropy, secret bit extraction rate, key generation rate, number of nodes and threat models. For an exhaustive comparison of these protocols, readers are encouraged to see work in [15].…”

“…In addition, RSS is usually extracted by a single frequency resulting in low bit generation rates. On the other hand, channel-phased quantisation presents several benefits as higher level of secrecy can be achieved by the uniform distribution of the phases on the channel taps and increase key generation rate by leveraging the whole 2 channel impulse response (CIR) [15]. It is also noticed that a higher number of secret bits can be extracted that removes the need to estimate RSS over a certain time window.…”