Searchable encryption (SE) technology allows users to use keywords to retrieve encrypted data and ensure that useful plaintext information of encrypted data will not be disclosed. For a secure SE scheme, if it is able to meet the multi-trapdoor privacy (MTP), the security will be improved compare with the traditional SE scheme. However, there are few searchable encryption schemes that can meet the requirement of MTP. In addition, many existing schemes ignore the need of multi keyword search, and both sides of communication use the same cryptosystem and cryptographic parameters, which leads to the problem of low search efficiency and practicability. Therefore, we propose a heterogeneous SE scheme that supports multi-keyword search, provides MTP and allows both sides of communication to be worked in different cryptosystems with different cryptographic parameters. With the use of the random oracle model (ROM), we demonstrate the security of the proposed scheme, and we show the excellent performance of the proposed scheme at the end of the article.

Searchable encryption (SE) technology allows users to use keywords to retrieve encrypted data and ensure that useful plaintext information of encrypted data will not be disclosed. For a secure SE scheme, if it is able to meet the multi-trapdoor privacy (MTP), the security will be improved compare with the traditional SE scheme. However, there are few searchable encryption schemes that can meet the requirement of MTP. In addition, many existing schemes ignore the need of multi keyword search, and both sides of communication use the same cryptosystem and cryptographic parameters, which leads to the problem of low search efficiency and practicability. Therefore, we propose a heterogeneous SE scheme that supports multi-keyword search, provides MTP and allows both sides of communication to be worked in different cryptosystems with different cryptographic parameters. With the use of the random oracle model (ROM), we demonstrate the security of the proposed scheme, and we show the excellent performance of the proposed scheme at the end of the article.

In wireless body area network (WBAN), the WBAN sensors usually transmit encrypted data for the sake of security. But because of this, finding and getting the required data quickly becomes a challenge. Thus, many scholars have proposed searchable encryption (SE) schemes. Regrettably, many proposed SE schemes are not resistant to inside keyword guessing attack (IKGA), and most schemes are not suited for cross-domain communication in WBAN because they use single cryptosystem and the same cryptographic system parameters. To address the aforementioned issues, we put forward a new SE scheme for WBAN based on the public key cryptosystem in this paper. Our scheme allows WBAN sensors in certificateless public key cryptography (CLC) and receivers in public key infrastructure (PKI) environment use different cryptographic system parameters to realize cross-domain heterogeneous communication. At the same time, our scheme can effectively resist IKGA. Compared to the five existing schemes, the total computation cost of our scheme reduced by at least 59.99%.

In wireless body area network (WBAN), the WBAN sensors usually transmit encrypted data for the sake of security. But because of this, finding and getting the required data quickly becomes a challenge. Thus, many scholars have proposed searchable encryption (SE) schemes. Regrettably, many proposed SE schemes are not resistant to inside keyword guessing attack (IKGA), and most schemes are not suited for cross-domain communication in WBAN because they use single cryptosystem and the same cryptographic system parameters. To address the aforementioned issues, we put forward a new SE scheme for WBAN based on the public key cryptosystem in this paper. Our scheme allows WBAN sensors in certificateless public key cryptography (CLC) and receivers in public key infrastructure (PKI) environment use different cryptographic system parameters to realize cross-domain heterogeneous communication. At the same time, our scheme can effectively resist IKGA. Compared to the five existing schemes, the total computation cost of our scheme reduced by at least 59.99%.

In wireless body area network (WBAN), the WBAN sensors usually transmit encrypted data for the sake of security. But because of this, finding and getting the required data quickly becomes a challenge. Thus, many scholars have proposed searchable encryption (SE) schemes. Regrettably, many proposed SE schemes are not resistant to inside keyword guessing attack (IKGA), and most schemes are not suited for cross-domain communication in WBAN because they use single cryptosystem and the same cryptographic system parameters. To address the aforementioned issues, we put forward a new SE scheme for WBAN based on the public key cryptosystem in this paper. Our scheme allows WBAN sensors in certificateless public key cryptography (CLC) and receivers in public key infrastructure (PKI) environment use different cryptographic system parameters to realize cross-domain heterogeneous communication. At the same time, our scheme can effectively resist IKGA. Compared to the five existing schemes, the total computation cost of our scheme reduced by at least 59.99%.