ContactDiscoveryService
simplex-chat
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ContactDiscoveryService | simplex-chat | |
---|---|---|
70 | 247 | |
270 | 5,264 | |
- | 4.0% | |
0.0 | 9.9 | |
12 months ago | 6 days ago | |
C | Haskell | |
GNU Affero General Public License v3.0 | GNU Affero General Public License v3.0 |
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Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
ContactDiscoveryService
- Is it generally ok to store phone numbers in a firestore database?
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7 Best Open-Source Alternatives To WhatsApp In 2023
[1] https://signal.org/blog/private-contact-discovery/
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WhatsApp data leak: 500M user records for sale
Signal uses SGX for remote attestation, which presumably lets the client verify that the code running on the server is a build of the OSS code and not a modified version. But I don't know the details or if this is reliable.
SGX and remote attestation described here:
https://signal.org/blog/private-contact-discovery/
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WhatsApp data breach sees nearly 500 million user records up for sale
Signal does private contact discovery and the effort they've gone to to do this is quite impressive.
- A brief family story about convincing boomer parents to Signal
- Elon on Signal
- Absolutely Insane "Feature"
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Types of Execution Environments, Attestation and SGX
TEEs have numerous privacy-enhancing applications that may benefit users. One of them is, as discussed earlier, private contact discovery; the Signal application uses a contact discovery service enhanced using Intel SGX, a TEE technology, to protect its users' privacy. A similar application of TEEs is performing malware analysis in a remote cloud service, so that the service may not identify users by the contents of their devices, such as the applications they have installed, especially important as 98.93% of users may be uniquely identified by the list of applications they have installed.
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Twilio Incident: What Signal Users Need to Know
Signal (or, more accurately, one of its predecessors) used to use client-side private set intersection for contact discovery, but this scales poorly [1].
Now they use a solution based on Intel SGX and server-side trusted computing [2].
[1] https://signal.org/blog/contact-discovery/
[2] https://signal.org/blog/private-contact-discovery/
- Where are Signal servers located and how is it safer than Swiss-based Threema ?
simplex-chat
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What are your favorite End-to-End encrypted tools for online privacy?
For messaging I'm currently on Olvid (E2E with physical key exchange) but since it still use their servers, I'm currently testing SimpleX where I can host my own servers.
- Apple reveals 'push notification spying' by foreign governments
- simplex bugs/ missing features
- Launching Default End-to-End Encryption on Messenger
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Apple Confirms Governments Using Push Notifications to Surveil Users
Notice how SimpleX (https://simplex.chat/) has no push notifications by default because of this issue.
- Possible today in Signal? Disable link preview
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SMS Security and Privacy Gaps
I've been using SimpleX [0] with a couple of friends recently. It appears to work as advertised.
[0] https://simplex.chat
- SimpleX Chat v5.3.0 – Local file encryption and delivery receipts
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U.K. Abandons, for Now, Legislation That Would Have Banned End-to-End Encryption
If you have a mobile phone number, the domestic intelligence agency knows exactly where you are at all times and any LEO (without a warrant) can also find you. In addition, there have been numerous CCC presentations showing how insecure the global (excluding US) and (separately) US carriers are guilty of promiscuous metadata trafficking ($$) and insecure SS7 setups. As a consequence, for low $, you can go to any one of several shady websites and find the last location of almost any phone number (person unique ID) globally. There are additional varying exploitable vulnerabilities depending on the exact combination of {handset x carrier x country} to impersonate them, tap their line, reveal their exact location, and redirect their phone number through a third-party handset or even a PBX. These are more expensive and some capabilities are forbidden for all but a few selective intelligence uses.
Session (Signal fork) doesn't use phone numbers. It's pretty well-designed overall and uses an onion routing approach. It's already a superset of Signal except it doesn't use phone numbers. https://getsession.org
Also look interesting:
* (unproven) https://www.olvid.io/technology
* (unproven) https://simplex.chat
PS: Using regular TOR on home broadband or cloud servers is relatively risky and inefficient. Sybil attacks on it are common. And to network operators and security agencies it gives an easy "flow tag" of your uplink and exit node data traffic as automatically suspicious.
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Re: Profile Pictures
Why not open up a Feature request on https://github.com/simplex-chat/simplex-chat/issues
What are some alternatives?
whatsapp-viewer - Small tool to display chats from the Android msgstore.db database (crypt12)
Element - A glossy Matrix collaboration client for the web.
TextSecure - A private messenger for Android.
session-android - A private messenger for Android.
Signal-Server - Server supporting the Signal Private Messenger applications on Android, Desktop, and iOS
nostr - a truly censorship-resistant alternative to Twitter that has a chance of working
TelegramAndroid - Fork client of Telegram app for Android.
Signal-Android - Fork from a private messenger for Android with extra options added: full backup and (partial, ony text) xml backup of messages. Restore can happen at any time, not only after a fresh install. Import SMS database. Import of (unencrypted) WhatsApp databases. Removed apk expire. Choose between passphrase protection and the Android screenlock. Choice for the backup location (internal or removable storage on Android < 11 (on 11 and higher this is already possible)). Set the maptype in the place picker. Option to treat view-once media as normal media. Option to ignore remote deletion. Choose between FCM or websocket notification delivery.
element-ios - A glossy Matrix collaboration client for iOS
termpair - View and control terminals from your browser with end-to-end encryption 🔒
simplexmq - ⚙️ SimpleXMQ - A reference implementation of the SimpleX Messaging Protocol for simplex queues over public networks.