An efficient forward-secure group certificate digital signature scheme to enhance EMR authentication process

Area of Science:

• Computer Science
• Information Security
• Cryptography

Background:

• Current digital signature algorithms like RSA and DSA lack forward security, compromising the trustworthiness of electronic medical records (EMRs) upon private key renewal.
• The loss of trust in EMRs signed by revoked keys poses a significant barrier to widespread EMR adoption.

Purpose of the Study:

• To propose an efficient forward-secure group certificate digital signature scheme.
• To ensure the continued trustworthiness of digital signatures even after private key renewals.
• To improve the efficiency of EMR authentication processes.

Main Methods:

• The proposed scheme is based on Shamir's (t,n) threshold scheme and Schnorr's digital signature scheme.
• This cryptographic approach combines threshold cryptography with a robust digital signature algorithm.

Main Results:

• The developed scheme provides forward security, maintaining the integrity of signed EMRs.
• It addresses the issue of lost trustworthiness when private keys are renewed.
• The scheme enhances authentication efficiency by optimizing the number of certificates and keys, and reducing search time.

Conclusions:

• The proposed forward-secure group certificate digital signature scheme effectively addresses the security limitations of existing methods for EMRs.
• This innovation is crucial for overcoming adoption barriers and increasing the reliability of electronic health records.