How to use it

QRTalk is a powerful yet simple to use messaging application.

QRTalk mobile app is available for free and can be used, without any restriction or limitation, to connect to public servers offered by QRTalk.

For security critical scenarios we suggest setting-up and running your own private server.

Public server

You can start using QRTalk simply installing it from the app store and creating a new public profile.

✓ Search and install QRTalk from the app store.

✓ Create a new public profile (or import a previously exported profile bundle).

✓ Add users or groups to your contacts list scanning QR-codes or typing-in IDs by hand.

✓ Start sending messages, pictures, videos and documents as you are used to do with other messengers.

Note: public profiles are good for product evaluation and other non security-critical uses.

 

Private server

If you need a higher level of security, you can install and run your own private server.

✓ Download and install QRTalk server package.

✓ Obtain a valid license file and upload it to your server.

✓ Search and install QRTalk client from the app store.

✓ Create a new private profile typing your private server network address.

✓ Add users or groups to your contacts list scanning QR-codes or typing IDs by hand.

✓ Start sending messages, pictures, videos and documents as you are used to do with other messengers.

 

QRTalk IDs

Since QRTalk is totally anonymous, anonymous identifiers are used in place of e-mail addresses, telephone numbers, hardware device identifiers or app-store unique identifiers.

User IDs

User IDs are seven-digits pseudo-random alphanumeric codes.

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You can tell your friends your User ID, or simply have them scan your QR-code, to be added to their contacts. You can ask your friends their User ID, or simply scan their QR-code, to add them to your contacts. When you create a new profile you can decide whether your User ID is visible or not. As a profile owner you can change User ID visibility whenever you want.

Note: other users can add your profile to their contacts only when your User ID is visible or if you let them scan your QR-code.

Note: when you scan a User ID QR-code from owner’s phone, you are also verifying that user’s public key.

Group IDs

Group IDs are eight-digits pseudo-random alphanumeric codes.

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You can create an unlimited number of groups with an unlimited number of members each.

When you create a group you can decide whether the Group ID is visible or not. As a group owner you can change Group ID visibility whenever you want.

You can tell your friends a visible Group ID, or simply have them scan the group QR-code, to let them join the group.

Note: other users can join a group, without owner’s action, only when Group ID is visible.

Public key fingerprints

Public key fingerprints are nine-digits alphanumeric codes.

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Public key fingerprints are used to verify authenticity of other user’s public keys. When you successfully verify a public key, you know for sure that nobody else but that user will ever be able to decrypt your messages.