docs: update installer info (#782)

diff --git a/docs/getting-started/installing/from-gui/debian-like.en.md b/docs/getting-started/installing/from-gui/debian-like.en.md
index 840beeb..f2e9993 100644
--- a/docs/getting-started/installing/from-gui/debian-like.en.md
+++ b/docs/getting-started/installing/from-gui/debian-like.en.md
@@ -1,33 +1,7 @@
 # :material-debian: Download assets
     
 * [`{{latest_installer_deb}}`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_deb}})
-* [`{{latest_installer_deb}}.sha256.txt`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_deb}}.sha256.txt)
-* [`{{latest_installer_deb}}.sig`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_deb}}.sig)
 
-## Verify the integrity
-
-----8<----
-verify-the-integrity-explain.en.txt
-----8<----
-
-```bash
-sha256sum --check ./{{latest_installer_deb}}.sha256.txt
-```
-    
-## Verify the authenticity
-
-----8<----
-verify-the-signature-explain.en.txt
-----8<----
-
-```bash
-gpg --verify ./{{latest_installer_deb}}.sig
-```
-
-----8<----
-verify-the-signature-tip.en.txt
-----8<----
-    
 ## Install
 
 **Krux-Installer** isn't available on Debian or Ubuntu repositories.
diff --git a/docs/getting-started/installing/from-gui/fedora-like.en.md b/docs/getting-started/installing/from-gui/fedora-like.en.md
index 471c6b9..867af3e 100644
--- a/docs/getting-started/installing/from-gui/fedora-like.en.md
+++ b/docs/getting-started/installing/from-gui/fedora-like.en.md
@@ -1,32 +1,6 @@
 # :material-fedora: Download assets
     
 * [`{{latest_installer_rpm}}`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_rpm}})
-* [`{{latest_installer_rpm}}.sha256.txt`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_rpm}}.sha256.txt)
-* [`{{latest_installer_rpm}}.sig`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_rpm}}.sig)
-
-## Verify the integrity
-
-----8<----
-verify-the-integrity-explain.en.txt
-----8<----
-
-```bash
-sha256sum --check ./{{latest_installer_rpm}}.sha256.txt
-```
-    
-## Verify the authenticity
-
-----8<----
-verify-the-signature-explain.en.txt
-----8<----
-
-```bash
-gpg --verify ./{{latest_installer_rpm}}.sig
-```
-
-----8<----
-verify-the-signature-tip.en.txt
-----8<----
 
 ## Install
 
diff --git a/docs/getting-started/installing/from-gui/index.en.md b/docs/getting-started/installing/from-gui/index.en.md
index 1cede1f..bfcb671 100644
--- a/docs/getting-started/installing/from-gui/index.en.md
+++ b/docs/getting-started/installing/from-gui/index.en.md
@@ -5,6 +5,7 @@ official desktop application, **Krux-Installer**:
 
 Install instructions:
 
+- [:material-fingerprint: Don't trust, verify](./verify-download.en.md)
 - [:material-microsoft-windows: Windows](./windows.md)
 - [:material-apple: MacOS Intel](./macos-intel.md)
 - [:material-apple: MacOS M1/M2/M3](./macos-arm64.md)
@@ -13,4 +14,4 @@ Install instructions:
 - [:material-linux: Other linux distros](./other-linux-distro.md)
 
 > ⚠️  If you find any bug, please submit a
-[issue here](https://github.com/selfcustody/krux-installer/issues).
\ No newline at end of file
+[issue here](https://github.com/selfcustody/krux-installer/issues).
diff --git a/docs/getting-started/installing/from-gui/macos-arm64.en.md b/docs/getting-started/installing/from-gui/macos-arm64.en.md
index 2214ad0..26e67ef 100644
--- a/docs/getting-started/installing/from-gui/macos-arm64.en.md
+++ b/docs/getting-started/installing/from-gui/macos-arm64.en.md
@@ -1,32 +1,6 @@
 # :material-apple: Download assets
     
 * [`{{latest_installer_mac_arm}}`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_mac_arm}})
-* [`{{latest_installer_mac_arm}}.sha256.txt`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_mac_arm}}.sha256.txt)
-* [`{{latest_installer_mac_arm}}.sig`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_mac_arm}}.sig)
-
-## Verify the integrity
-
-----8<----
-verify-the-integrity-explain.en.txt
-----8<----
-
-```bash
-sha256sum --check ./{{latest_installer_mac_arm}}.sha256.txt
-```
-    
-## Verify the authenticity
-
-----8<----
-verify-the-signature-explain.en.txt
-----8<----
-
-```bash
-gpg --verify ./{{latest_installer_mac_arm}}.sig
-```
-    
-----8<----
-verify-the-signature-tip.en.txt
-----8<----
 
 ## Install
 
diff --git a/docs/getting-started/installing/from-gui/macos-intel.en.md b/docs/getting-started/installing/from-gui/macos-intel.en.md
index 98644de..4b731f1 100644
--- a/docs/getting-started/installing/from-gui/macos-intel.en.md
+++ b/docs/getting-started/installing/from-gui/macos-intel.en.md
@@ -1,32 +1,6 @@
 # :material-apple: Download assets
     
 * [`{{latest_installer_mac_intel}}`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_mac_intel}})
-* [`{{latest_installer_mac_intel}}.sha256.txt`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_mac_intel}}.sha256.txt)
-* [`{{latest_installer_mac_intel}}.sig`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_mac_intel}}.sig)
-
-## Verify the integrity
-
-----8<----
-verify-the-integrity-explain.en.txt
-----8<----
-
-```bash
-sha256sum --check ./{{latest_installer_mac_intel}}.sha256.txt
-```
-
-## Verify the authenticity
-
-----8<----
-verify-the-signature-explain.en.txt
-----8<----
-
-```bash
-gpg --verify ./{{latest_installer_mac_intel}}.sig
-```
-
-----8<----
-verify-the-signature-tip.en.txt
-----8<----
 
 ## Install
 
diff --git a/docs/getting-started/installing/from-gui/other-linux-distro.en.md b/docs/getting-started/installing/from-gui/other-linux-distro.en.md
index e9d4fec..ea57713 100644
--- a/docs/getting-started/installing/from-gui/other-linux-distro.en.md
+++ b/docs/getting-started/installing/from-gui/other-linux-distro.en.md
@@ -3,33 +3,7 @@
 For this installation, we'll use the `.deb` sources:
 
 * [`{{latest_installer_deb}}`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_deb}})
-* [`{{latest_installer_deb}}.sha256.txt`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_deb}}.sha256.txt)
-* [`{{latest_installer_deb}}.sig`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_deb}}.sig)
-
-## Verify the integrity
-
-----8<----
-verify-the-integrity-explain.en.txt
-----8<----
-
-```bash
-sha256sum --check ./{{latest_installer_deb}}.sha256.txt
-```
-    
-## Verify the authenticity
-
-----8<----
-verify-the-signature-explain.en.txt
-----8<----
-
-```bash
-gpg --verify ./{{latest_installer_deb}}.sig
-```
-
-----8<----
-verify-the-signature-tip.en.txt
-----8<----
-    
+   
 ## Install
 
 This step it's not really an installation.
@@ -61,4 +35,4 @@ The binary will be located at `./usr/local/bin/krux-installer`.
 
 ----8<----
 after-install-installer.en.txt
-----8<----
\ No newline at end of file
+----8<----
diff --git a/docs/getting-started/installing/from-gui/verify-download.en.md b/docs/getting-started/installing/from-gui/verify-download.en.md
new file mode 100644
index 0000000..e361645
--- /dev/null
+++ b/docs/getting-started/installing/from-gui/verify-download.en.md
@@ -0,0 +1,64 @@
+Before start using the GUI, it's **strongly recommended** to verify the authenticity of the [{{latest_installer_sha}}](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_sha}}.txt) file.
+It attest the integrity of all variants ([{{latest_installer_deb}}](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_deb}}), [{{latest_installer_rpm}}]((https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_rpm}})), [{{latest_installer_mac_arm}}](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_mac_arm}}), [{{latest_installer_win}}](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_win}})).
+
+To do this, download two files:
+
+* [`{{latest_installer_sha}}`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_deb}}.sha256.txt);
+* [`{{latest_installer_sha}}.sig`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_deb}}.sig).
+
+## Verify the authenticity
+
+**Linux/MacOS**
+
+The next step is import the developer's key:
+
+```bash
+gpg --keyserver {{latest_installer_keyserver}} --recv-keys {{latest_installer_key}}
+```
+
+Then, to verify yourself, run this:
+
+```bash
+gpg --verify {{latest_installer_sha}}.txt.sig
+```
+
+**Windows**
+
+* You'll need have [GPG](https://gnupg.org/) installed;
+* We recommend installing [GPG4Win](https://www.gpg4win.org/).
+
+After install, you can proceed with **Linux/MacOS** steps in the terminal.
+
+> ⚠️  TIP: If the verification was successful, you may get a message similar to: `Good signature from "qlrddev <qlrddev@gmail.com>"`.
+Also, you can ignore a WARNING message if it says that the key isn't a trusted one (you need to do it manually).
+
+## Verify the integrity
+
+After verify that the [`{{latest_installer_sha}}`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_deb}}.sha256.txt)
+is authentic, we can proceed with the integrity check in your `bash`/`zsh` terminal:
+
+**Linux / MacOS**
+
+```bash
+sha256sum --check {{latest_installer_sha}}.txt
+```
+
+**Windows**
+
+You can verify the integrity with this command in a `powershell` terminal:
+
+```pwsh
+(Get-FileHash '.\{{latest_installer_win}}' -Algorithm SHA256).Hash -ieq (
+  (Select-String '.\{{latest_installer_sha}}' -Pattern (
+      '^\s*([0-9a-f]{64})\s+' + [regex]::Escape((Split-Path '.\{{latest_installer_win}}' -Leaf)) + '$'
+    ) | Select-Object -First 1
+  ).Matches[0].Groups[1].Value
+)
+```
+
+> 🛡️  TIP: If you followed the authenticity/integrity checks steps presented, you already
+have the assurance that the software is from a verified and genuine software publisher.
+This will also help establish a chain of trust when you perform the firmware verification
+step before flashing.
+
+
diff --git a/docs/getting-started/installing/from-gui/windows.en.md b/docs/getting-started/installing/from-gui/windows.en.md
index 40f6876..6f895fc 100644
--- a/docs/getting-started/installing/from-gui/windows.en.md
+++ b/docs/getting-started/installing/from-gui/windows.en.md
@@ -1,62 +1,6 @@
 # :material-microsoft-windows: Download assets
  
 * [`{{latest_installer_win}}`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_win}})
-* [`{{latest_installer_win}}.sha256.txt`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_win}}.sha256.txt)
-* [`{{latest_installer_win}}.sig`](https://github.com/selfcustody/krux-installer/releases/download/{{latest_installer}}/{{latest_installer_win}}.sig)
-
-## Verify the integrity
-
-----8<----
-verify-the-integrity-explain.en.txt
-----8<----
-
-```pwsh
-(Get-FileHash '.\{{latest_installer_win}}').Hash.ToLower() -eq (Get-Content '.\{{latest_installer_win}}.sha256.txt').split(" ")[0]
-```
-
-The result in prompt should be `True`.
-
-Alternatively, you can check more closely in two steps:
-
-* Compute the binary sha256sum hash:
-
-```pwsh
-# Option 1: Compute in default way
-Get-FileHash '.\{{latest_installer_win}}'
-
-# Option 2: Compute and filter the necessary information
-(Get-FileHash '.\{{latest_installer_win}}').Hash
-
-# Option 3: Compute, filter and process the Hash for lowercase letters
-(Get-FileHash '.\{{latest_installer_win}}').Hash.ToLower()
-```
-
-* Compare with provided hash:
-
-```pwsh
-# Option 1: Get content 
-Get-Content '.\{{latest_installer_win}}.sha256.txt'
-
-# Option 2: Get content and filter the necessary information
-(Get-Content '.\{{latest_installer_win}}.sha256.txt').split(" ")[0]
-```
-
-## Verify the authenticity
-    
-* You'll need have [GPG](https://gnupg.org/) installed;
-* We recommend installing [GPG4Win](https://www.gpg4win.org/).
-
-----8<----
-verify-the-signature-explain.en.txt
-----8<----
- 
-```pwsh
-gpg --verify ./{{latest_installer_win}}.sig
-```
-
-----8<----
-verify-the-signature-tip.en.txt
-----8<----
 
 ## Install
 
diff --git a/docs/snippets/verify-the-integrity-explain.en.txt b/docs/snippets/verify-the-integrity-explain.en.txt
deleted file mode 100644
index a283a75..0000000
--- a/docs/snippets/verify-the-integrity-explain.en.txt
+++ /dev/null
@@ -1 +0,0 @@
-Open your terminal and type the command below:
diff --git a/docs/snippets/verify-the-signature-explain.en.txt b/docs/snippets/verify-the-signature-explain.en.txt
deleted file mode 100644
index de4cebf..0000000
--- a/docs/snippets/verify-the-signature-explain.en.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-The first step is import the developer's key:
-
-```bash
-gpg --keyserver hkps://keys.openpgp.org --recv-keys B4281DDDFBBD207BFA4113138974C90299326322
-```
-
-Then, to verify yourself, run this command on your terminal:
diff --git a/docs/snippets/verify-the-signature-tip.en.txt b/docs/snippets/verify-the-signature-tip.en.txt
deleted file mode 100644
index 6e1f4fb..0000000
--- a/docs/snippets/verify-the-signature-tip.en.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-> ⚠️  TIP: If the verification was successful,
-> you may get a message similar to: `Good signature from "qlrddev <qlrddev@gmail.com>"`
diff --git a/docs/snippets/verify-the-signature-trust-tip.en.txt b/docs/snippets/verify-the-signature-trust-tip.en.txt
deleted file mode 100644
index c20ad40..0000000
--- a/docs/snippets/verify-the-signature-trust-tip.en.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-> 🛡️  TIP: If you followed the steps presented in [authenticity section](#verify-the-authenticity),
-you already have the assurance that the software is from a verified and genuine software publisher.
-This will also help establish a chain of trust when you perform the firmware verification
-step before flashing.
diff --git a/mkdocs.yml b/mkdocs.yml
index c0a7673..fbd584a 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -59,6 +59,10 @@ extra:
   latest_installer_win: krux-installer_v0.0.20.Setup.exe
   latest_installer_mac_arm: krux-installer_0.0.20_arm64.dmg
   latest_installer_mac_intel: krux-installer_0.0.20_x86_64.dmg
+  latest_installer_sha: krux-installer.SHA256.txt
+  latest_installer_sig: krux_installer.SHA256.txt.sig
+  latest_installer_key: B4281DDDFBBD207BFA4113138974C90299326322
+  latest_installer_keyserver: hkps://keys.openpgp.org
   social:
     - icon: fontawesome/solid/bullhorn
       link: https://bitcointalk.org/index.php?topic=5489022.0