• Soniya Sunil Agrawal
• Vivek S. Gulhane
• Harshal N. Datir

In the present era, one of the major encounter is the data security. Most organizations store their data in huge databases that enables uncomplicated retrieval, manipulations, and also helps in an efficient way of sharing. Cloud Database security has now become a more dynamic issue as data s the greatest asset to any organization. Due to the rapid increase in the database usage, it is vulnerable to many threats like unauthorized access, data loss, crashed database etc. To overcome these issues, numerous security techniques have emerged to protect the data in databases. Cloud Database encryption a security technique involves various encryption algorithms such as, Data Encryption Standard (DES), Triple DES and Enhanced-Transposition- Substitution-Folding -Shifting (ETSFS).Each of them has its specific merits and demerits. Unlike ETSFS, has constraint on data Size and the number of special characters, the proposed method improvement focus on the encryption of large data considering all types of special characters and a random generator is used for generating keys in substitution phase. The proposed methodology of the paper focused on the future work of the ETSFS algorithm and successfully implement for securing cloud database with the comparison of the four encryption algorithms (AES, DES, Triple DES, RSA).The scope of this proposed paper will move around the concept of file/data recovery from cloud by the technique called “Cloud Mirroring”. The file/data recovery involves the recovery of corrupted data, or data crash etc. and storing encrypted data in cloud database-using ETSFS algorithm

Encryption, Folding, Protection, Transposition, Security, Shifting, Substitution, Recent Activity Table(RAT)

"Cloud Mirroring A Technique Of Data Recovery Using ETSFS Algorithm", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.142-146, June 2019, Available :http://www.jetir.org/papers/JETIR1908B21.pdf

"Cloud Mirroring A Technique Of Data Recovery Using ETSFS Algorithm", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp142-146, June 2019, Available at : http://www.jetir.org/papers/JETIR1908B21.pdf