upofadown

Arguably things are now worse. Signal combined the safety number of you and your correspondent into one really big number[1]. The result is a less intuitive as a number no longer represents the identity of a correspondent.

Signal has been having multiple issues due to the poor usability of their identity management lately[2].

[1] Safety number updates https://signal.org/blog/safety-number-updates/

[2]

A Third Party Breached The Intercept’s Signal Tip Line and Has Been Soliciting Whistleblowers https://www.dropsitenews.com/p/intercept-signal-tip-line-bre...

Twilio Incident: What Signal Users Need to Know https://support.signal.org/hc/en-us/articles/4850133017242-T...

Russian State-Backed Hackers Intensify Attacks on Signal Messenger Accounts https://thecyberexpress.com/signal-attacks-russian-fackers-t...

End to End Encrypted Messaging in the News: An Editorial Usability Case Study (my article) https://articles.59.ca/doku.php?id=em:sg

The article on end to end email encryption:

>Contrast all this with Signal or WhatsApp, where encryption works automatically because a single organisation controls the full software stack rather than using open protocols.

In a usability study involving Signal[1], 21 out of 28 computer science students failed to establish and maintain a secure end to end encrypted connection. There seems to be a tradeoff. We can do either usability or security, but never both at the same time.

[1] When SIGNAL hits the Fan: On the Usability and Security of State-of-the-Art Secure Mobile Messaging https://www.ndss-symposium.org/wp-content/uploads/2018/03/09...

An example of the cost of added complexity I suppose. Brotli is much more complicated than the gzip/deflate it replaces. ... and of course we still have to expose gzip to attack as well.

Every time you add something you lose something...

One big usability issue these days is that PGP identities come in the form of a file. Lots of people don't have the concept of that anymore.

Dunno that things have gotten much better over the years. End to end encryption is still fairly unusable to most. I think that rather than spending so much time on the cryptography we should instead work on a E2EE usability standard. Having everyone doing their own thing with respect to usability is not working out.

Obligatory response to "The PGP Problem":

* https://articles.59.ca/doku.php?id=pgpfan:tpp

By what I saw, there wasn't really anything anyone would care about in https://gpg.fail/ . The GnuPG problem actually declined to respond to some of them.

... and don't take the vendor's word for it. I got burned on a GL-SFT1200 that way. It runs their version of OpenWRT. You can't install generic OpenWRT.

From the article:

>Still, some real-world systems continue to use blind-signature, also known as textbook, RSA.

I think those are two different things.

Once you are in the Waymo, why bother getting out just to get on a bus?

In New York, increases in the use of ride services like Uber mostly came from bus and subway riders[1]. If we are being charitable to Google, we might assume that this initiative is intended to reduce the same sort of trend. If we are not being charitable, we might assume that this initiative is intended to encourage current bus riders to expose themselves to the product.

[1] https://www.6sqft.com/mta-says-uber-use-is-the-cause-of-nyc-...

Hard to judge. The bottleneck is the phase of the algorithm where a really big linear system needs to be solved. That takes a lot of communication between nodes. The breakthrough in using GPUs is that there is good communication between nodes[1]. At the scale of 1024 bit RSA the communication might become a bottleneck again.

[1] https://cognition.com/blog/factoring-rsa-260

Is someone providing prize money again? RSA ended the contest in 2007.

Well most people don't verify identity with some sort of physical key. So it doesn't work as an analogy in the first place for signatures...

Allegedly, Signalgate was caused by Apple helpfully mapping the wrong number to a name. Then Signal mapped that number to the wrong cryptographic identity.

A Third Party Breached The Intercept’s Signal Tip Line and Has Been Soliciting Whistleblowers https://www.dropsitenews.com/p/intercept-signal-tip-line-bre...

Twilio Incident: What Signal Users Need to Know https://support.signal.org/hc/en-us/articles/4850133017242-T...

Russian State-Backed Hackers Intensify Attacks on Signal Messenger Accounts https://thecyberexpress.com/signal-attacks-russian-fackers-t...

Unfortunately, in an end to end encrypted messaging system, an identity is denoted by some sort of long number. That is an inescapable fact. Trusting a third party to correctly map, say, a phone number to a cryptographic identity number eventually results in the sort of attacks we have been seeing with phone oriented encrypted messengers recently like WhatsApp and Signal. The PGP people were doing the right thing when they were doing education in the form of key signing parties. That is something the user needs to know.

Anonymous messengers have no real choice and have to use some sort of number for identity. See Briar, Session or Tox for examples.

My comments on Signalgate 1.0:

https://articles.59.ca/doku.php?id=em:sg

What does the speed of RSA have to do with anything?

My article:

2048 Bit RSA and the Year 2030 https://articles.59.ca/doku.php?id=em:20482030

We don't have any way to predict when and if 2048 bit RSA would be factorable at this time. We would need a breakthrough in hardware and/or algorithms. The common estimation that it is equivalent to the difficulty of brute forcing symmetrical 112 bit encryption is a simple extrapolation. It doesn't take into account the amount of memory required for the poorly reducible matrix reduction step in the currently known best algorithm. That's 10^18 bytes of memory, or a million terabytes, somehow coupled to enough processing power to actually make anything possible.

This article from 2000 is about estimating what would be required to factor 1024 bit RSA:

A Cost-Based Security Analysis of Symmetric and Asymmetric Key Lengths https://cr.yp.to/bib/2000/silverman.pdf

It was a response to the idea that 1024 bit RSA was under threat at the time.

I note that that extensive list only contains a single death, due to a power failure. Extreme civil disobedience, but not really terrorism.

You can attempt 15 yourself if you want:

https://towardsdatascience.com/where-are-we-with-shors-algor...

If you run it over and over again you will eventually get 3 or 5...

This article (mine) is about this:

2048 Bit RSA and the Year 2030 https://articles.59.ca/doku.php?id=em:20482030

I guess it could be updated to include this latest factoring result. Said result would not change the conclusion of the article.

It's not just because the GPG user is small fry that 1024 bit RSA is low risk for them. It is mostly because there is only one of them. A nation state attacker would have to spend billions of dollars and years of lost opportunity to use their resource more effectively to get the messages/files of a single person. There are much cheaper and faster ways to accomplish the same thing.

If, say, Gmail was using some static 1024 bit RSA based scheme things would be different. Then an attacker would get the messages of billions of users.

OBSD Amsterdam is pretty cool. I am currently running an instance on it. One feature that could also be considered a bug is that the VPSes run on the native OpenBSD virtualization scheme. My instance has suffered a few crashes over the years. It's been solid more recently. I suspect that OBSD Amsterdam and users have contributed to improvements to the native virtualization.

So you control your instance by sshing into a BSD account on the server. You configure your reverse DNS the same way. It's OpenBSD all the way down. So, as mentioned, pretty cool. Possibly not for the OBSD user who prefers some sort of web based configuration for their VPS.

It comes with access to a server you can copy your backups to. You of course do that from your instance using ssh.

OVH doesn't seem to directly support installation of arbitrary images. So installing OpenBSD can be a bit awkward. A relevant search:

* https://searxng.shreven.org/search?q=openbsd+ovhcloud

You can always send and receive messages no matter what XEPs are supported. Not that that is a problem in practice. There is a fairly well established subset of XEPs that everyone supports.

https://xmpp.org/extensions/xep-0479.html

https://compliance.conversations.im/

Wait, Mastodon has 10 million users and 8000 servers? That's way more than I would of guessed. So Mastodon is a real thing in the world now.

Twitter has something like a half a billion users. So it wins I guess...