This paper presents a generic method to convert weak asymmetric and symmetric encryption schemes into a chosen-ciphertext secure asymmetric encryption scheme in the random oracle model. The conversion is the first of its kind, transforming any one-way asymmetric encryption scheme into an IND-CCA secure one. The authors define the necessary security notions, including one-wayness, well-spreadness, and chosen-ciphertext security, and provide a detailed proof of the conversion's security. The resulting hybrid encryption scheme is secure against adaptive chosen-ciphertext attacks, making it suitable for practical applications.This paper presents a generic method to convert weak asymmetric and symmetric encryption schemes into a chosen-ciphertext secure asymmetric encryption scheme in the random oracle model. The conversion is the first of its kind, transforming any one-way asymmetric encryption scheme into an IND-CCA secure one. The authors define the necessary security notions, including one-wayness, well-spreadness, and chosen-ciphertext security, and provide a detailed proof of the conversion's security. The resulting hybrid encryption scheme is secure against adaptive chosen-ciphertext attacks, making it suitable for practical applications.