AN IMPROVED ATTRIBUTE BASED ACCESS CONTROL IN PERSONAL HEALTH RECORDS USING CLOUD WITH CONSTANT CIPHERTEXT LENGTH - Dzarma, Bitrus Isahaka; Yakubu, Ismail Zahraddeen; Gital, Abdulsalam Ya’u; Zambuk, Fatima Umar; Mustapha, 4Saleh Waziri; Abba, Ishaya; Lawal, Mustapha Abdulrahman (International Journal of Advance Research and Innovative Ideas In Education, 2025)