All the participants are expected to be able to conduct in-space demonstrations by 2025 and show that their technology is capable of "new high-rate and high-capacity two-way communications." NASA will sign multiple long-term contracts with the companies that succeed in developing effective communication technologies for near-Earth operations by 2030.
Threema: tips and tricks for the secure messenger
The instant messenger Threema is a great alternative for WhatsApp. Here you will find tips and tricks for the privacy-focused messaging app here.