This paper proposes a secure threshold—based secret sharing scheme utilizing Shamir’s Threshold Scheme, enhanced with RSA and AES encryption for confidentiality and integrity. The dealer publicly distributes encrypted shares among n participants in groups, ensuring that any subset meeting the threshold can reconstruct the secret. RSA encryption safeguards the shares and secret keys, while AES encrypts the state matrix containing the public key information. Hashing ensures data integrity and prevents tampering during reconstruction using Lagrange Interpolation. This approach delivers a robust, secure model for group—based secret sharing and reconstruction.