Honkai: Star Rail has a ton of puzzles that you can solve to get treasure chests and rewards, including Stellar Jades, Credits, EXP, and more. One of them is the Base Zone of Herta Space Station, where you will find a locked door that will require you to complete triple authentication by using by combining three access authentication cards.
However, you will not get any directions to find them, and thus, we have provided all the card locations below to help you get the rewards quickly.
Honkai: Star Rail Triple Authentication Door Card Locations
You will find the Triple Authentication Door at the location marked on the map above in Herta Space Station, and here are the exact locations of all the access authentication cards.
Access Authentication Card 1 Location
To get the first authentication card, you will have to go to the Master Control Zone at the location marked on the map below and talk to the Man with Afro standing there five times.
Access Authentication Card 2 Location
Go to the location marked on the map in Storage Zone and enter the room next to it and go on the left side.
After moving forward, you will find a Control Device that you can interact with, and it will open up a new path with Orange colored bridges. Cross the first bridge by going to the right side of the room's door and interact with another Control Device that you find there.
Keep on moving on the new path opened, and you will find a highlighted spot outside a room. Investigate it to get the second authentication card.
Access Authentication Card 3 Location
Go to the location marked on the map in the Base Zone, and you will find an enemy that you will have to beat. After that, open the chest behind it to obtain the third access authentication card.
Now, return to the triple authentication door, interact with the Control Device in front of it, and click on Confirm to open the door. Once you are in, you will have to beat two enemies to get a treasure chest.