Nowadays, data security is playing a significant role in the communication system as the hackers between transmissions media are more. The level of security depends on the secret key according to the work, the security level is more for the key size of higher bits and also larger data size becomes a major challenge task for further process. Therefore, the generation of a key with more size is a major challenging task. At present, the Advanced Encryption Standard (AES) is a better cryptography system where the encryption and decryption can perform with a secure key. The literature says the holomorphic function is well suitable for data size reduction. To address this issue, novel Holomorphic based encryption and decryption and AES are combined to increase the security level. The second novelty is the variable key generation using Elliptic Curve Cryptography (ECC) due to its enlarged proportion of consideration in industry and researchers. Point addition and Point doubling are employed for ECC to produce 256 values and multiplication operations can be avoided. After the generation of a matrix, each matrix value is encrypted and decrypted using a Holomorphic algorithm.