docs(add): doc in menu (#5016)

Author: nerda-codes

menu/navigation.json

@@ -510,6 +510,10 @@
                     "label": "Understanding Key Manager",
                     "slug": "understanding-key-manager"
                   },
+                  {
+                    "label": "Understanding Key Manager cryptography",
+                    "slug": "cryptographic-details-key-manager"
+                  },
                   {
                     "label": "Differences between Key Manager and Secret Manager",
                     "slug": "differences-key-and-secret-manager"

pages/key-manager/reference-content/cryptographic-details-key-manager.mdx

@@ -1,16 +1,16 @@
 ---
 meta:
-  title: Cryptographic details of Scaleway Key Manager
+  title: Understanding Key Manager cryptography
   description: This page describes the cryptographic mechanisms used by Scaleway Key Manager, in accordance with ANSSI-PA-079 recommendations.
 content:
-  h1: Cryptographic details of Scaleway Key Manager
+  h1: Understanding Key Manager cryptography
   paragraph: This page describes the cryptographic mechanisms used by Scaleway Key Manager, in accordance with ANSSI-PA-079 recommendations.
 tags: key-manager security
 categories:
   - identity-and-access-management
 dates:
-  validation: 2025-05-12
-  posted: 2025-05-12
+  validation: 2025-05-23
+  posted: 2025-05-23
 ---
 
 ## Cryptographic primitives in Scaleway Key Manager
@@ -25,7 +25,7 @@ Scaleway Key Manager uses a **C**ryptographically **S**ecure **P**seudorandom **
 
 This CSPRNG is based on the ChaCha-based pseudorandom number generator provided by modern Linux kernels. It is seeded with high-entropy, unpredictable sources, such as:
 
-- Timing variations from hardware events  
+- Timing variations from hardware events
 - True Random Number Generators (TRNGs), including the `RDSEED` and `RDRAND` instructions available on AMD64 processors
 
 <Message type="note">
@@ -57,8 +57,7 @@ To reduce the risk of key overuse, plaintext payloads are limited to a maximum s
  While Key Manager internally uses AES-256-GCM, this does not restrict users to the same algorithm for their data encryption keys (DEKs).  
   We recommend using cryptographic libraries like Tink, which handle DEK management with robust and reviewed algorithms.
   Scaleway provides Tink integrations for Go and Python, which is the preferred integration method.
-  
+
    - [Tink Python integration](https://github.com/scaleway/tink-py-scwkms)
    - [Ting Go integration](https://github.com/scaleway/tink-go-scwkms)
-
 </Message>