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Integration With E2EE (optional)

This article explains the basic steps to send/receive E2EE Messages. We will focus on how to use the Be-Bound Server SDK, not the security part (e.g. encryption, signature, etc.).

Be-Bound `Server SDK`

This SDK is provided by the Be-Bound company, and is only required if you need the End-to-End Encryption (E2EE) feature. Please contact us if you are interested.

For the below examples, we will use the following manifest.xml file content:

<beapp xmlns=""
        <message name="message_demo">
            <boolean name="message_bool"/>
            <integer name="message_integer"/>

Be-Bound Server SDK Overview

Be-Bound Server SDK is a command line tool, which include the BitBuffer technology, and whose objective is to encode your data (JSON) into a BitBuffer payload (i.e. binary compressed data payload), and vice versa. More information on BitBuffer can be found here.

Command line options


  • besdk [command]

Available Commands:

  • decode: Decode a BitBuffer message to JSON. Mandatory arguments: [message] [Bitbuffer bytes hex encoded]
  • encode: Encode a JSON message to BitBuffer. Mandatory arguments: [message] [json payload]
  • help: Help about any command


  • -h, --help help for besdk
  • -m, --manifest string BeApp Manifest XML (required)
  • -v, --verbose output the error on stdout instead of stderr

How to encode a Json into a BitBuffer payload (hex string format) ?

> besdk encode message_demo '{"message_bool":true,"message_integer":1234567}' -m manifest.xml


How to decode a BitBuffer payload (hex string format) into a Json ?

> besdk decode message_demo 80096b4380 -m manifest.xml


Sending an E2EE Message (server side)

Please find below the steps that are required to send an E2EE Message (from your Server to your mobile or IoT App):

  • You convert your message (JSON object) into a BitBuffer data payload (hex string) using Be-Bound Server SDK.
  • You apply a security method (the same you will use on the mobile app) to the BitBuffer binary payload (after conversion from hex string) to encrypt and/or sign your data.
  • You can now send the secured binary payload within the body of the HTTP Post Request (including the right HTTP headers as discussed here, especially the Content-Type metadata).

Detailed example (bash script):

# encode your json message to a BitBuffer binary payload
> PAYLOAD=$(./besdk encode message_demo '{"message_bool":true,"message_integer":1234567}' -m manifest.xml | xxd -r -p)

# for example, encrypt the payload using the AES256 symmetric algorithm
> PAYLOAD_ENC=$(echo $PAYLOAD | openssl enc -e -aes-256-cbc)

# send the content of $PAYLOAD_ENC in the body of a HTTP Post request...

Receiving an E2EE Message (server side)

Please find below the steps that are required to receive an E2EE Message (from your mobile or IoT App):

  • You first need to extract the Content-Type header to check if the received message is signed and/or encrypted.
  • You apply the same security methods as in your mobile app to decrypt and/or verify your message.
  • The Server SDK can then decode your message (based on the hex string value) into a Json object, which can be processed by your application.

Detailed example (bash script):

# extract the HTTP Post request body

# decrypt the received data payload
PAYLOAD_DEC=$(echo $PAYLOAD_ENC | openssl enc -d -aes-256-cbc | xxd -p)

# decode the BitBuffer binary payload into a json message
JSON=$(besdk decode message_demo $PAYLOAD_DEC -m manifest.xml)

Integration With E2EE (optional)

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