https://www.ratnadeep.space/ 2026-11-09 https://www.ratnadeep.space/images/ratnadeep.png Ratnadeep Bose Ratnadeep Bose, VAPT and application security practitioner based in Kolkata, India https://www.ratnadeep.space/images/Screenshot%202026-10-16%20163009.png HDFC Bank private bug bounty invitation - Ratnadeep Bose Private bug bounty program invitation evidence for Ratnadeep Bose https://www.ratnadeep.space/images/achievements/zerodha.png Zerodha security finding recognition - Ratnadeep Bose Validated security finding recognition associated with Ratnadeep Bose https://www.ratnadeep.space/images/Screenshot%202026-05-30%20004222.png Yatra security finding acknowledgement - Ratnadeep Bose Security finding acknowledgement related to Ratnadeep Bose https://www.ratnadeep.space/images/11000000208%20-%20Ratnadeep%20Bose-1.png Paytm Android security assessment evidence - Ratnadeep Bose Responsible disclosure evidence for Ratnadeep Bose's mobile security assessment