Cryptographic ALU is a unique resource in Warframe that can only be farmed during the Razorback Armada event. You need it to build the Razorback Cipher to complete the event’s challenging fight. It will only drop from Corpus Archwing enemies and is only found on Jupiter and Neptune.
How To Get Cryptographic ALU
To get your hands on Cryptographic ALU, you will need to fire up your Archwing, and head for Jupiter or Neptune. While doing any Archwing mission on these planets will get you some of the resources, Salacia is considered to be the best place to farm it. Due to high volumes of enemies, you can get more of the resource here than in other missions.
It is important to note that the resource will drop where enemies die; it will not automatically be pulled into your inventory. You will need to keep a careful eye on the enemies you kill to spot the drop. They can be tough to spot, so try not to miss any. You can, if you have access to it, use the Itzal Archwing, as its third ability will automatically pull the drop to you.
Building the Razorback Cipher
You will need 4 Cryptographic ALU to build the Razorback Cipher, along with 1250 Credits, 1500 Polymer Bundle, and 3 Gallium. It has a one minute build time, like most key items in the game. The Lotus will give you the blueprint for the Razorback Cipher at the start of the event. Even though it only takes one person to use the Cipher, and bypass the security door, you cannot play the mission unless you have a Razorback Cipher in your gear slot, and the Cipher will be used throughout the mission. This happens even if it is not you who uses it on the door.
Remember, when you get into the room to fight the Razorback, it cannot be hurt until you hack the Bursas at the top of the room. Once the Bursas incapacitate the Razorback, you can then do damage to it. Now you know how to get your hands on the Cryptographic ALU and build the Razorback Cipher. Good luck taking on this powerful enemy.