Постквантовая защита WhatsApp, новый Matrix 2.0 и PoW-задачи для входа на сайт

На Хабре уже упоминали , что протокол Signal получил постквантовую защиту, хотя в краткой новости не вдавались в детали. Но это действительно важное событие с учётом того, что количество пользователей этого протокола превышает 1 млрд человек за счёт WhatsApp. Signal применяется для криптографической защиты сессий в одноимённом мессенджере, в Google RCS , WhatsApp и др. Опенсорсный протокол можно использовать в любом ПО. Итак, что изменилось в криптографической подсистеме?

https://habr.com/ru/companies/globalsign/articles/774962/

#Signal #Onion_Services #PoW_DDoS #CPP #client_puzzle_protocol #Equix #Matrix_20 #Element_X #Online_Safety_Bill #OSB #P2P #эллиптические_кривые #X3DH #PQXDH #CRYSTALSKyber

#Signal's post-quantum encryption, #PQXDH, has now been formally verified.
Hell yeah.
https://cryspen.com/post/pqxdh/

#quantum #encryption #ComputerScience

Hopefully soon TLS1.4 with ECDHE+PQXDH or new ciphers for TLS1.3 with ECDHE+PQXDH will be released :-)

#tls #pqxdh @filippo

https://cryspen.com/post/pqxdh/

"An analysis of Signal's PQXDH"

[Karthikeyan Bhargavan (Cryspen), Charlie Jacomme (Inria), Franziskus Kiefer (Cryspen), Rolfe Schmidt (Signal)]

#signal #pqxdh #postquantum

Great to see #signal is making a lot of progress of late, both on user centric features and security and privacy areas.

Recently they released the #PQXDH crypto implementation to make signal messages post quantum ready.

Now Signal has released the message #edit feature on the usability front, after releasing the text formatting capability a few months ago.

Message edit is a great feature and you can use it to make corrections to a sent message withing a given amount of time.

But what I really liked is the fact that there is no time limit to edit messages sent to oneself… (Note to self). It’s pretty handy, specifically for me, as I keep a lot of notes on Notes to self and making changes had been pretty tough.. but now I’m just able to edit them and to remind me what I edited, I can see a full edit history.. Really cool feature.

Thanks folks @signalapp

#signal : The #PQXDH #protocol is an extension of the #X3DH #protocol that establishes a shared #secret #key between three parties: Alice, Bob, and a server1 .
PQXDH provides #postquantum #forward #secrecy and a form of cryptographic deniability but still relies on the hardness of the discrete log problem for mutual authentication4 PQXDH is already supported in the latest versions of Signal's client applications and is in use for chats[…] #Further #reading

https://signal.org/docs/specifications/pqxdh/

Wow.

#Signal is strengthening its protocol and now has a way to resist #quantum computing attempts to break into your private messages.

I wonder what experts in #quantumcomputing like @rdviii think about this?

#privacy #security #messaging #encryption #pqxdh

From: @signalapp
https://mastodon.world/@signalapp/111092685323940010