diff --git a/README.md b/README.md
index 193d7e3..c42ff0d 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,15 @@
-# UTAT Firmware Development Environment
+# UTAT Firmware Development MCUBoot POC
 
-My firmware development environment for the University of Toronto Aerospace Team 
+Documentation of the steps taken to implement MCUBoot.
 
-https://docs.zephyrproject.org/latest/develop/getting_started/index.html
+## Environnment config
+Use the environment written in flake.nix by running `nix develop`
+
+
+## Set up Zephyr
+Zephyr is the RTOS that runs on the Nucleo G431RB development board I'm using.
+
+[Getting started with Zephyr](https://docs.zephyrproject.org/latest/develop/getting_started/index.html)
 
 ```sh
 west init zephyrproject
@@ -13,25 +20,85 @@ west zephyr-export
 
 cd zepyhr
 west sdk install
+```
 
+## MCUBoot POC Implementation
+
+MCUBoot is a bootloader for Zephyr, which allows multiple firmwares to exist on a board. MCUBoot can dynamically switch which firmware is active. This is useful in the event of one firmware failing.
+
+[Abstract MCUBoot Guide](https://docs.mcuboot.com/readme-zephyr.html)
+
+```sh
 west build -p always -b nucleo_g431rb samples/basic/blinky
 west flash --runner pyocd # had to su root first to run this (after running nix develop)
+```
 
-# MCUBoot
-cd ~/utat-dev/zephyrproject
-# Configure the DTS for partition sizes: https://docs.zephyrproject.org/latest/build/dts/intro-scope-purpose.html
-# https://docs.zephyrproject.org/latest/build/dts/api/bindings/mtd/fixed-partitions.html
-nvim "zephyr/boards/st/nucleo_g431rb/nucleo_g431rb.dts"
 
+## Configure partition sizes
+
+The devicetree specification file declares the hardware configuration. The flash storage needs three partitions, one for boot, and two for the two firmwares it will hold.
+
+[DeviceTree Specification documentation](https://docs.zephyrproject.org/latest/build/dts/intro-scope-purpose.html)
+
+[Partitioning examples](https://docs.zephyrproject.org/latest/build/dts/api/bindings/mtd/fixed-partitions.html)
+
+The board I'm using has its DeviceTree Specification in `zephyr/boards/st/nucleo_g431rb/nucleo_g431rb.dts`
+
+I created a partition for MCUBoot, two firmware slots, and additional storage in the flash storage.
+
+```c
+&flash0 {
+	partitions {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		boot_partition: partition@0 {
+			compatible = "zephyr,mapped-partition";
+			label = "mcuboot";
+			reg = <0x00000000 0x00008000>;
+		};
+
+		slot0_partition: partition@8000 {
+			compatible = "zephyr,mapped-partition";
+			label = "image-0";
+			reg = <0x00008000 0x00010000>;
+		};
+
+		slot1_partition: partition@10000 {
+			compatible = "zephyr,mapped-partition";
+			label = "image-1";
+			reg = <0x00010000 0x0018000>;
+		};
+
+		storage_partition: partition@18000 {
+			compatible = "zephyr,mapped-partition";
+			label = "storage";
+			reg = <0x00018000 0x00020000>;
+		};
+	};
+};
+
+```
+
+## Try to build MCUBoot
+```sh
+west build -p always -b nucleo_g431rb bootloader/mcuboot/boot/zephyr
+```
+
+
+
+old below
+```
 # Create a private key: https://docs.mcuboot.com/readme-zephyr.html
-./scripts/imgtool.py keygen -k mykey.pem -t rsa-2048
+python ./bootloader/mcuboot/scripts/imgtool.py keygen -k private.pem -t rsa-2048
 
 # Create its public key
-openssl rsa -in mykey.pem -pubout > pubkey.pem
+openssl rsa -in private.pem -pubout > public.pem
 
 # Set up signing: https://docs.mcuboot.com/readme-zephyr.html
 # ./bootloader/mcuboot/samples/zephyr/Makefile
-python scripts/imgtool.py sign \
+python bootloader/mcuboot/scripts/imgtool.py sign \
     --key mykey.pem \
     --header-size 0x200 \
     --align 8 \
@@ -44,7 +111,7 @@ python scripts/imgtool.py sign \
 echo "
 
 # Set the key file
-CONFIG_BOOT_SIGNATURE_KEY_FILE=pubkey.pem" >> "./zephyr/boards/st/nucleo_g431rb/nucleo_g431rb_defconfig"
+CONFIG_BOOT_SIGNATURE_KEY_FILE=public.pem" >> "./zephyr/boards/st/nucleo_g431rb/nucleo_g431rb_defconfig"
 
 
 
diff --git a/flake.nix b/flake.nix
index e147a27..594fdf4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -34,6 +34,7 @@
         pkgs.python3Packages.click
         pkgs.pyocd
         pkgs.mcuboot-imgtool
+        pkgs.openssl
       ];
 
     };
diff --git a/zephyrproject/mykey.pem b/zephyrproject/mykey.pem
deleted file mode 100644
index 51f3b78..0000000
--- a/zephyrproject/mykey.pem
+++ /dev/null
@@ -1,28 +0,0 @@
------BEGIN PRIVATE KEY-----
-MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDfwKJjEhk0GRa8
-GzfzgqXt6S54wK37jpwS3mQDReII49cnXogOCxyVWh25nOisvSEp0Ke7syt7YF6j
-hfKaNlTLpZQ0hJ4G7DrPTkA3BIUqsmu5EY7/Uq880QUr327PrN4xbIQti0ZvR7gk
-Nb6q43xuP86WSAHseWzaz4Dlw8d+E89T0gSfOj7yCWPah9NuJOCQFWbdwi3T8B+e
-X6csT4O8nsF1YPmU2VBG8L6vsdcIMtZ3puoD2t7pmMHOqnEjN7lfgpOIfyU/rxiH
-jxp3s6ejrvFs6jI0ibHlhyb+owXnXtM9eoZym27RKV2F+oP6t00fK+rfNynh0a75
-j9JkvDWDAgMBAAECggEAGR8JnFHl3oGKmef8aiya8JEjlI8deYbTYxLw66Um8ZST
-DWqBoAIDXYlWmQZS4UICvS0eB+bf1ORG+9kIGeRLtOmMMDFLhL91At1oPEUXpmmN
-yqN8CJKB9jQJfpmBWXOxJp9mX66pY8kLlZUrKQiNadtkGF9RR/mCDTcK48ENXswo
-v5tqJ9KTme/BaTj0/j6SurSqISpedOdXPafFY2vZhPA4Odue4ahZuDxkzorzF/a1
-TZRHlsqAalUz11clpOGKIxOA9iQvtPri7VKb+siONMF9pp8jP4OCHZfsnP0t4MzF
-87jsa6U7CcszpDsdGIAnnw/sqh1W1uvJsBJG42Mb4QKBgQD9rsOGZNj2RYNiAXLN
-N05tDCf7Toj/hUkwsT5dWKu6aNfhrmrrNoceExHkASlwVMojwTWdVsIoByjMVRh5
-ORQKq7seP4SdT5o2Qx9bP6dWFkly61UFD/OI415p8n2oEmKhaA97VjBjppxg6jNp
-WqvF/rBBVSkHdC3jzM5cII8maQKBgQDhy+D+ShSfSc5T7FgYiukQ3sF7x0pzbfjU
-K9wV4B8yKcHS1PPxYIFBsxD89EO7+quGPQhlRY1dcJxqxltPhSGy2xtOQr7nFpxM
-PJbydDhC5N/PFKf39T44ABH6Lhw4iR2jcoI1vwxiqtsCnMuUsGxie7lA8/ZNs1de
-fUQJug03CwKBgDH/4Q+7DrwzZTrK2Eq0TOPXUoYIq53ZMlzDgmw5jtdV1L7pdq9X
-dvgpgAw1Ymp+e7ziVuPk9q2XA6aKWyGBa37S7DWBBW1QBDAPuL1uZVflWqKo2X/+
-7dwcHD67iaK3xPLVJMAFc9IgQ5AiePGZ6mNC2JB37XdHocfVVRL5Y92JAoGAbMMY
-DWUBqfiTOjmN9cRzn3ytFkJYymEeipTV3nOmkzMp+bQ6DPq/SDZI6I+AUPvdwzuC
-38Uw4uFrdsM1GIi4Qr7n2DquWgG6J77HtuHkd9RnOghpIDcxUSg3gJrVXSYu8Jwn
-vFvaS2yhMhD0vxp8GrQd9/uLmMHaQ9ly/HxyASECgYEA8VO/rA7KMDo/RU1w2hAS
-UUAYz+bZSHqvlP1IhmfKEhJOj1pBFZz0SHiT8xrSrXIOj0oO3gxbM3hlVVP5+1TS
-toob+H2LI9LjFN9dA8R9OYFLII+eSKUXRMtFdk4r8Vbsca1cIxjBLvKOvEP3rDaZ
-mQXQa0mysxjGQSyDFV/w37Q=
------END PRIVATE KEY-----
diff --git a/zephyrproject/private.pem b/zephyrproject/private.pem
new file mode 100644
index 0000000..d924ca0
--- /dev/null
+++ b/zephyrproject/private.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/zephyrproject/pubkey.pem b/zephyrproject/pubkey.pem
deleted file mode 100644
index 8867081..0000000
--- a/zephyrproject/pubkey.pem
+++ /dev/null
@@ -1,9 +0,0 @@
------BEGIN PUBLIC KEY-----
-MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA38CiYxIZNBkWvBs384Kl
-7ekueMCt+46cEt5kA0XiCOPXJ16IDgsclVoduZzorL0hKdCnu7Mre2Beo4XymjZU
-y6WUNISeBuw6z05ANwSFKrJruRGO/1KvPNEFK99uz6zeMWyELYtGb0e4JDW+quN8
-bj/OlkgB7Hls2s+A5cPHfhPPU9IEnzo+8glj2ofTbiTgkBVm3cIt0/Afnl+nLE+D
-vJ7BdWD5lNlQRvC+r7HXCDLWd6bqA9re6ZjBzqpxIze5X4KTiH8lP68Yh48ad7On
-o67xbOoyNImx5Ycm/qMF517TPXqGcptu0SldhfqD+rdNHyvq3zcp4dGu+Y/SZLw1
-gwIDAQAB
------END PUBLIC KEY-----
diff --git a/zephyrproject/public.pem b/zephyrproject/public.pem
new file mode 100644
index 0000000..3ca296c
--- /dev/null
+++ b/zephyrproject/public.pem
@@ -0,0 +1,9 @@
+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAr3Es05+LJagX/lOpWVel
+bFtY+lvnXzln9OG2Z0r4g/52lVqEqFcH2TNSgflGTLEACqqsVYazK8IItq2SzkyG
+7pqo5jtNKAR+Y6qiPCa0V9u0IPLuV24GJ8274B5slRI+vP5eior/BKZ64YYf+iak
+Xg3SXX1Ji9TDuS5lPGLvSHgUatMg8dyXzZ/EGjSMYev8a+dEFszXqiYAf6FcGd//
+TOCNRxoHgPIU60wrRA7aSudG0r8CpOl/JlkP2S1TV22psovlCulKp6+6yeyK2DMr
+O3YgBqfsSCMtAnYncJRRbv7ooM4xKkl/3IgvbAVTij6E9L5uDjFQ02LzmD4Zo9Qv
+QQIDAQAB
+-----END PUBLIC KEY-----