Farath Begum I know you're new to RG but please read the rules and regulations for RG questions:

https://explore.researchgate.net/pages/viewpage.action?pageId=14155852

In addition, the following types of content will not be accepted in Q&A:

• General knowledge questions that can be answered easily using a search engine
• Content that is unrelated to the question
• Requests for help with homework, dissertation titles, or dissertation topics
• Questions relating to the general use of ResearchGate

Dear Farath Begum ,

Here is a good topic:

Mutual authentication algorithms in client/server architectures utilizing multi-channel security communication schemes.

It involves many aspects of Identity and Access Management (IAM)

Hi

I recommend authentication and key exchange using blockchain.

There are many issues in the field of data security, their storage, protection and correct deletion. There are new devices that collect various data, such as IoT. But choose something that interests you. If you choose something that doesn't interest you, you will get tired and you won't get results.

Frequency domain based watermarking for Data Protection in multimedia components in Information System