diff --git a/protocols/openstack/infomaniak.md b/protocols/openstack/infomaniak.md
index 8630605e..a245c13a 100644
--- a/protocols/openstack/infomaniak.md
+++ b/protocols/openstack/infomaniak.md
@@ -12,17 +12,18 @@ Infomaniak
 
 > [High Performance Cloud Infrastructure. In Switzerland, at the right price.](https://www.infomaniak.com/en/hosting/public-cloud)
 
-### Connecting
+### Connecting (Swift)
 
 :::{note}
 Connection profiles can be installed from *Preferences → Profiles*.
 :::
 
-#### Connection Profiles
+#### Swift Connection Profiles
 
 Log in to your *Infomaniak OpenStack Swift space* via this preconfigured connection profile:
 
-- {download}`Infomaniak Public Cloud (01) - connection profile<https://profiles.cyberduck.io/Infomaniak%20Public%20Cloud%2001%20(Swift).cyberduckprofile>`
+- {download}`Infomaniak Public Cloud 01 (Swift)<https://profiles.cyberduck.io/Infomaniak%20Public%20Cloud%2001%20(Swift).cyberduckprofile>`
+- {download}`Infomaniak Public Cloud 02 (Swift)<https://profiles.cyberduck.io/Infomaniak%20Public%20Cloud%2002%20(Swift).cyberduckprofile>`
 
 #### Additional Fields Required
 
@@ -31,11 +32,96 @@ Enter the following information in the [bookmark](../../cyberduck/bookmarks.md):
 - **Project:Domain:Username**: Information available in your Infomaniak manager. Example: `PCP-XXXXXX:Default:PCU-XXXXXX`
 - **Password**: password is the same as the one you use for the OpenStack dashboard
 
+---
+
+### Connecting (S3)
+
+Infomaniak Public Cloud also supports the S3 protocol, fully compatible with AWS Signature Version 4. This is distinct from Swiss Backup and requires EC2-style credentials generated from the OpenStack API.
+
+:::{important}
+Do **not** use Swiss Backup credentials with the S3 protocol. Only credentials from **Public Cloud** via the OpenStack API (EC2-style) are supported.
+:::
+
+#### S3 Connection Profiles
+
+- {download}`Infomaniak Public Cloud 01 (S3)<https://profiles.cyberduck.io/Infomaniak%20Public%20Cloud%2001%20(S3).cyberduckprofile>` — Region: `dc3-a`
+- {download}`Infomaniak Public Cloud 02 (S3)<https://profiles.cyberduck.io/Infomaniak%20Public%20Cloud%2002%20(S3).cyberduckprofile>` — Region: `dc4-a`
+
+These profiles are configured with:
+
+- Correct hostname (`s3.pub1.infomaniak.cloud` or `s3.pub2.infomaniak.cloud`)
+- Region explicitly set (required for AWS Signature V4)
+- Path-style access enabled (`s3.bucket.virtualhost.disable=true`)
+
+#### How to Generate Credentials (OpenStack CLI)
+
+To use the S3 protocol, generate EC2-compatible credentials using the OpenStack CLI.
+
+##### Prerequisites
+
+Install the OpenStack CLI and set environment variables:
+
+```bash
+export OS_AUTH_URL=https://keystone.pub1.infomaniak.cloud
+export OS_USERNAME=PCU-XXXXXXX
+export OS_PROJECT_ID=PCP-XXXXXXX
+export OS_PASSWORD=your_password
+export OS_USER_DOMAIN_NAME=Default
+export OS_PROJECT_DOMAIN_NAME=Default
+```
+
+You can retrieve these from the [OpenStack Horizon dashboard](https://cloud.infomaniak.com) under “API Access”.
+
+##### Create EC2 Credentials
+
+Run:
+
+```bash
+openstack ec2 credentials create
+```
+
+This returns:
+
+```
++-------------+----------------------------------+
+| Field       | Value                            |
++-------------+----------------------------------+
+| access      | 5a6c43a89e914eb3b388df9817dcdef2 |
+| secret      | xL5Hv2Bp8MqHkKrMBXr7PvVHZoUZaeYF |
+| project_id  | f091b24c7413428a98b7a4455dc12345 |
+| user_id     | 3c362f13e0f144eb8a78fcd6a8aaabcd |
++-------------+----------------------------------+
+```
+
+In Cyberduck:
+
+- **Access Key ID** → value of `access`
+- **Secret Access Key** → value of `secret`
+
+---
+
+### Troubleshooting
+
+If you encounter this error:
+
+```
+SignatureDoesNotMatch
+The request signature we calculated does not match the signature you provided.
+```
+
+Verify:
+
+- The `Region` field in your profile is set to `dc3-a` or `dc4-a` (not `us-east-1`)
+- You are using EC2 credentials from the Public Cloud API (not Swiss Backup)
+- Path-style access is enabled
+
+---
+
 ### References
 
-- [Official Infomaniak Public Cloud documentation](https://docs.infomaniak.cloud)
-- [Find out more about Infomaniak Public Cloud](https://www.infomaniak.com/en/hosting/public-cloud)
-- [Test Infomaniak Public Cloud with free tiers](https://www.infomaniak.com/en/hosting/public-cloud)
+- [Official Infomaniak Public Cloud documentation](https://docs.infomaniak.cloud/)
+- [OpenStack EC2 Credentials Documentation](https://docs.openstack.org/keystone/latest/user/ec2_credentials.html)
+- [Cyberduck S3 Protocol Help](https://trac.cyberduck.io/wiki/help/en/howto/s3)
 
 ## Infomaniak Swiss Backup
 
@@ -45,6 +131,23 @@ Swiss Backup is a solution that automatically backs up your files, workstations,
 
 ### Connecting
 
+:::info
+Swiss Backup also supports both the **Swift** and **S3** protocols.
+
+The type of protocol (Swift or S3) must be selected when you create a new backup space in the Infomaniak Manager.
+
+- If you select **S3**, credentials will be generated automatically during setup.
+- These credentials are distinct from those used with Infomaniak Public Cloud.
+- S3 credentials for Swiss Backup cannot be created via the OpenStack CLI.
+
+You will receive:
+
+- An **Access Key ID** and a **Secret Access Key**
+- A specific **S3 endpoint URL** (different from Public Cloud)
+
+:::
+
+
 :::{note}
 Connection profiles can be installed from *Preferences → Profiles*.
 :::