• Pratibha Singh
• Prof.K.S. Warke
• Mokshi Pandita
• Maclina Biswas

In the recent digital world, information security has become an important issue. Due to the advanced technology different ways are used to copy, redistribute and store the digital contents easily. The authentication of the original owner and copyright protection of data is a challenging task. Digital watermarking provides a solution for digital contents copyright protection and ownership verification. A secret message is placed inside a digital content without compromising valuable data. This secret information is used later for ownership identification, Secure Hash Algorithms, also known as SHA, are a family of cryptographic functions designed to keep data secured. It works by transforming the data using a hash function: an algorithm that consists of bitwise operations, modular additions, and compression functions, in our project we are going use the SHA for file downloading from Cloud by using Key. We can consider key as a security purpose, if user key gets match than only download functionality works otherwise use cannot download the available file from cloud.

"The Management Of Security For Text Document Protection Using Various Algorithms", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 4, page no.495-498, April 2020, Available :http://www.jetir.org/papers/JETIR2004561.pdf

"The Management Of Security For Text Document Protection Using Various Algorithms", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 4, page no. pp495-498, April 2020, Available at : http://www.jetir.org/papers/JETIR2004561.pdf