Assuring data security and communication integrity and limiting unauthorized access to critical data via public networks are now the most prevalent security concerns in cloud servers. We address these problems by introducing a secure data access and storage method that uses Quantum Resistant Advanced Encryption standards (QRAES) encryption algorithm on data blocks to safeguard both keys and data. To maintain data transmission security, it employs an alternative interpretation of Advanced Encryption Standards. Furthermore, certified safe key creation with low time complexity uses a shared secret that is provided by Diffie Hellman (DH). Furthermore, to protect against data loss and corruption due to insiders in the cloud, an Optimized Swarm Intelligence Algorithm (SIA) is used; this algorithm effectively recovers and restores any lost data. To maintain the confidentiality and integrity of sensitive data, the proposed system lays out and authenticates the path for safe data, addressing access security issues in cloud data storage and access.