A Hybrid Approach to Data Security Using Steganography and Blockchain for Tamper-Proof Communication

In the data security the cryptography and steganography could be usefull for data security individually. But individual these security techniques are not enough to provide sufficient data security. In this paper we have shows that steganography and blockchain are used together to hide encrypted data inside image. The proposed method will solve two major drawbacks of the current existing security techniques, the large size of ciphertext imbedded into an image and other is to provide integrity and authenticity are guaranteed by blockchain, because it provide unalterable ledger and cryptographic hashes. Tamper detection will guaranteed through verification of the extract messages’s hash against blockchain data.