Is this true - apparently there is no aryan invasion as per this article?

https://timesofindia.indiatimes.com/toi-plus/society-culture/decoding-6k-year-old-language-can-bury-modern-myths/articleshow/118790879.cms?

Is the Cryptographer genuine?

Is the method of cryptography authentic and backed by scientific evidence? I could not find any peer reviewed paper or citation to anything.