SimpleX Chat

SimpleX - the first messaging platform without user identifiers of any kind - 100% private by design!

Security assessment: https://simplex.chat/blog/20221108-simplex-chat-v4.2-security-audit-new-website.html

Public Key

npub1ht6s6d0xuscv0rkt09wt7y7wzfvs6d6uk3ysf3kan44a040hh2ds5q3f5x

NIP-05 Address

simplex_at_mastodon.social@mostr.pub

Profile Code

nprofile1qqst4agdxhnwgvx83m9hjh9lz08pykgdxawtgjgycmwe667h6hmm4xcpz4mhxue69uhhyetvv9ujumt0wd68ytnsw43qmqwtkm

Publishing to

relay.mostr.pub

Author Public Key

npub1ht6s6d0xuscv0rkt09wt7y7wzfvs6d6uk3ysf3kan44a040hh2ds5q3f5x

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Last Notes

2024-08-24 12:12:27

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5. Does the company log timestamps/IP addresses? Yes
This is incorrect, we never logged IP addresses and access timestamps of the users.
Further, the private message routing that is now enabled by default for all users prevents such logging by any 3rd party servers with modified code:
https://simplex.chat/blog/20240604-simplex-chat-v5.8-private-message-routing-chat-themes.html

2024-08-24 12:12:08

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4. Directory service could be modified to enable a MITM attack? Yes
This is incorrect, as there is no user directory service, and MITM by relays is not possible by design, even without optional security code verification (that exists to mitigate MITM by the channel you used to pass one-time invitation link, e.g. email).

2024-08-24 12:11:48

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3. Cryptographic primitives: Curve25519 / XSalsa20 256 / Poly1305 (downgraded for the absence of PQ encryption).
We added PQ encryption in March this year: https://simplex.chat/blog/20240314-simplex-chat-v5-6-quantum-resistance-signal-double-ratchet-algorithm.html
This is done in the same way as Apple describes as PQ3 here: https://security.apple.com/blog/imessage-pq3/

2024-08-24 12:11:07

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2. Company jurisdiction: UK
We disagree that there are any jurisdictions that are particularly good for privacy. Also, this might be important for centralised services, like Threema, where the users can't host servers, and much less important for decentralized network, such as SimpleX, where there are hundreds (if not thousands) of servers that we don't control.

2024-08-24 12:10:24

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1. Main reasons why the app isn't recommended: Provide a transparency report
It is available online and updated at least quarterly, or if anything changes: https://simplex.chat/transparency/

2024-08-24 12:09:52

https://www.securemessagingapps.com is the great comparison of messaging apps, but there are several incorrect statements about SimpleX Chat.
Commenting in the thread below!

2024-07-10 22:02:39

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@npub1lpz…p4e6 I don't think it would have a major difference as the app doesn't check messages, it is push. But if you do an experiment, please let me know. Using private routing should reduce battery usage a bit.

2024-07-04 19:52:31

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@npub1xx8…rvjd you have to compile it from source on the device - it's certainly possible. Now that GitHub added Linux aarch64 runners, we might add them to the releases.

2024-07-01 14:12:23

SimpleX Chat flatpak is now available!
https://flathub.org/apps/chat.simplex.simplex

2024-06-30 18:02:36

A Q&A with the users in SimplifiedPrivacy.com group on SimpleX Chat:
https://primal.net/e/nevent1qqsxjjxykeyg7k4dm47djvu2kwzyxrctjp43ydm5s5tknrpxl2d7ltgpr4mhxue69uhkummnw3ezuenvv9kkjmn8dukk6ctfdshxxmmdqy8hwumn8ghj7efwdehhxtnvdakqzrthwden5te0dehhxtnvdakqzxrhwden5te0wfjkccte9ehx7umhdpjhyefwvdhk6q3q4slk4lshtylkrqg9z0dvng09gn58h88frvnax7uga3v0h25szj4q6gn9ha

2024-06-23 09:20:48

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@npub1m45…lyhy Yes, but isn't it the good news? Time is all we have, write more letters to representatives.

2024-06-04 19:38:13

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@npub1ule…f93v updated!

2024-06-01 20:53:49

Protecting children's safety requires privacy and end-to-end encryption:
https://simplex.chat/blog/20240601-protecting-children-safety-requires-e2e-encryption.html
Proposed "upload moderation" would fuel the very problem it aims to solve, undermining rather than protecting children's safety.
#safety #privacy #encryption

2024-05-16 19:01:25

Improving communication #privacy requires making many hard choices:
https://simplex.chat/blog/20240516-simplex-redefining-privacy-hard-choices.html#

2024-05-03 08:37:09

We are upgrading the preset SimpleX relays to the new version - it is compatible only with the apps starting from v5.5.3 (released early February) - please upgrade to the latest version and ask your friends to upgrade too.

2024-04-26 22:31:17

SimpleX Chat v5.7: better UX for calls and messages
New in v5.7:
- quantum resistant e2e encryption will be enabled for all contacts.
- forward and save messages without revealing the source.
- in-call sounds and switching sound sources.
- customizable profile images - from square to circle.
- better network connection management.
Also, we added Lithuanian interface language to Android and desktop apps - thanks to our users!
Read moret: https://simplex.chat/blog/20240426-simplex-legally-binding-transparency-v5-7-better-user-experience.html

2024-04-22 23:48:12

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@npub1rxs…u6g6 so instead of this ' try this ʼ or ՚ or ߴ - all of them should work I think.

2024-04-22 23:46:31

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@npub1rxs…u6g6 straight apostrophe is used in terminal app for the names with spaces, so it's not allowed as part of the name. You can use some of the variations - like curved apostrophe.

2024-04-19 08:51:09

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@npub1j98…meln Not really, no such option.