Control messages - AWS Wickr
Services or capabilities described in AWS documentation might vary by Region. To see the differences applicable to the AWS European Sovereign Cloud Region, see the AWS European Sovereign Cloud User Guide.

This guide documents the new AWS Wickr administration console, released on March 13, 2025. For documentation on the classic version of the AWS Wickr administration console, see Classic Administration Guide.

Control messages

Control messages set up and configure secure rooms and group conversations. Wickr also requires these messages to reconstruct the list of users involved in specific secure rooms and group conversations.

Like verification messages, these messages contain additional metadata to describe their actions. The control object can include the following:

  • A bor field. This is the burn-on-read time in seconds.

  • A ttl field. This is the expiration time in seconds.

  • A description field. This is the conversation's description.

  • A title field. This is the title of the conversation.

  • A changemask field. This is a number value created by adding the following flag values.

Setting Flag value

Masters field (moderators)

1

TTL (expiration)

2

Title field (room name)

4

Description

8

Meeting ID key

16

Burn on read

32

Saved items (file vault)

64

In the following example, the changemask value of 47 is equal to the sum of Masters (1), TTL (2), Title (4), Description (8), and Burn on read (32).

{ "control": { "bor": 0, "changemask": 47, "description": "", "masters": ["user001", "user002"], "members": ["user001", "user002", "user003"], "msgtype": 4001, "title": "Creating a room", "ttl": 2592000 }, "message_id": "be452b00f89711e883588d1e7a946847", "msg_ts": "1544019125.000000", "msgtype": 4001, "sender": "user002", "sender_type": "normal", "time": "12/5/18 2:52 PM", "time_iso": "2018-12-05 14:52:05.000", "vgroupid": "S58a15186365d2125a9b417e71b99bcb29e3770078e157e953cfbe28443eb750" }