Security has become one of the top priorities in a fallen world. The systems used to safeguard houses, businesses, governments, the internet etc. is mind boggling and can get very sophisticated!
Heaven also has a strict security system. ONLY "those who are victorious will inherit" the Kingdom, while others will be "consigned to a "second death" (Rev.21:7-8) Believe it: Things like fingerprint identification or facial recognition will not open heaven's portals. All will be judged whether it can be recognized if we have the Spirit of Jesus in our hearts.