Higher Rate Secret Key Formation (HRKF) based on Physical Layer for Securing Vehicle-to-Vehicle Communication

Abstract

One effort to secure vehicle-to-vehicle (V2V) communication is to use a symmetrical cryptographic scheme that requires the distribution of shared secret keys. To reduce attacks on key distribution, physical layer-based key formation schemes that utilize the characteristics of wireless channels have been implemented. However, existing schemes still produce a low bit formation rate (BFR) even though they can reach a low bit error rate (BER). Note that V2V communication requires a scheme with high BFR in order to fulfill its main goal of improving road safety. In this research, we propose a higher rate secret key formation (HRKF) scheme using received signal strength (RSS) as a source of random information. The focus of this research is to produce keys with high BFR without compromising BER. To reduce bit mismatch, we propose a polynomial regression method that can increase channel reciprocity. We also propose a fixed threshold quantization (FTQ) method to maintain the number of bits so that the BFR increases. The test results show that the HRKF scheme can increase BFR from 40% up to 100% compared to existing research schemes. To ensure the key cannot be guessed by the attacker, the HRKF scheme succeeds in producing a key that meets the randomness of the NIST test.

Steganography Based on Data Mapping and LSB Substitution With RSS Key Generation

“…In paper (Dewi et al, 2020) (Sudarsono et al, 2019) (Wei et al, 2013) states that the SKG scheme consists of four stages which includes exchanging channel information between users to obtain RSS measurements via the channel probing stage, as well as converting the obtained RSS into binary bit form via the quantization stage, using an error correction scheme, the information reconciliation stage corrects the binary bit sequence obtained in the previous stage, and the privacy amplification stage increases the protection of the hidden key bit sequence to prevent it from being predicted by third parties.…”