Bonum Certa Men Certa

Guarding Your Privacy With E2EE: Primer

End-to-end encryption deciphered

Lock and Key



Summary: "As with all security, there is assumed risk no matter how careful you are. There are no security guarantees but that doesn't mean you shouldn't try."

End-to-end encryption (E2EE) is something that's been in the news quite frequently. Lack of education about E2EE is being exploited. Your fundamental human rights are being violated. This article serves to educate the non-technical person about E2EE and how it affects their everyday life.



Let us get a few fundamental things clarified, first. Without these basic things, no proper discussion can happen around E2EE.

"Another important thing to note is that the sender sees the data that will be encrypted in its unencrypted form anyway. Obvious statement but important to remember."What is E2EE? E2EE is a system in which data is encrypted so that only one party can decrypt the data: the intended recipient(s).

Note that we used the word "system" in our definition for E2EE. This is done to keep the scope of this article separate from any specific E2EE software.

Another important thing to note is that the sender sees the data that will be encrypted in its unencrypted form anyway. Obvious statement but important to remember.

Next, let us note articles 12 and 19 of the Universal Declaration of Human Rights (UDHR).

LockArticle 12 UDHR: "No one shall be subjected to arbitrary interference with his privacy, family, home or correspondence, nor to attacks upon his honour and reputation. Everyone has the right to the protection of the law against such interference or attacks."

Article 19 UDHR: "Everyone has the right to freedom of opinion and expression; this right includes freedom to hold opinions without interference and to seek, receive and impart information and ideas through any media and regardless of frontiers."

We'll refer to these as A12UDHR and A19UDHR, from now on.

We've now established some fundamental definitions; we can move on to what all this means in the context of E2EE.

Let's now connect what A12UDHR and A19UDHR have to do with E2EE.

A12UDHR mentions privacy. Our data privacy is a form of privacy. Thus, according to A12UDR, every human being has a fundamental right to data privacy. The only way we can achieve data privacy is via E2EE.

"The only way we can achieve data privacy is via E2EE."A19UDHR mentions the freedom to hold opinions WITHOUT INTERFERENCE and to seek and impart INFORMATION and ideas THROUGH ANY MEDIA (we're paraphrasing here to highlight information relevant to this article). Thus, according to A19UDHR, every human being has a right to exchange INFORMATION THROUGH ANY MEDIA. End-to-end-encrypted data (E2EED) is a form of information; thus A19UDHR gives every human being a right to seek and impart E2EED over any medium they wish.

So, in summary, we've established the following as an inalienable right of every human being:

Every human being has a fundamental right to use E2EE and seek and impart E2EED over any medium they wish (Internet, printed documents, etc.).

Now it's time to consider the technical side.

If you go back to our definition of E2EE, you will see that there are strict requirements about who can decrypt E2EED.

Many platforms (email, social control media, messaging apps, etc.) advertise E2EE. They are pretty much all not E2EE. Why? They have the keys that can decrypt your data. Go back and read the definition of E2EE again.

What are these "keys"? Good question.

Every system of E2EE is basically built on the idea of a pair of keys:

"Many platforms (email, social control media, messaging apps, etc.) advertise E2EE. They are pretty much all not E2EE."Public Key (PKEY): Just a file. A sort of identifier. PKEYs are used in E2EE to encrypt data so that only the intended recipient(s) can decrypt the encrypted data.

Secret Key (SKEY): Just a file. This is the (only) file which can be used to decrypt the encrypted data.

There exists a mathematical relationship between a PKEY and a SKEY which makes it infeasible to decrypt the encrypted data without access to the recipient's SKEY. When used correctly, E2EED is safe even from the quantum computers of today.

You can refer to the end of this article for the technical details.

"You can willingly forfeit your privacy (and many do by accepting "Terms and Conditions" of various platforms and services) but no body has a right to forcibly take away your privacy."The easiest way to decrypt E2EED is to get a hold of the recipient's SKEY or to catch the pre-encrypted data via some sort of back door in the device being used to encrypt the data. The problem is, many organisations already have your SKEY; they keep a copy for themselves, when SKEY has been generated. So, these systems don't actually satisfy our definition of E2EE.

Remember: You have a fundamental right to end-to-end encryption. You have a fundamental right to keep the secret keys used for your end-to-end encryption software private. Nobody has the right to take these secret keys away from you - no company, no government, no individual, no organisation. You can willingly forfeit your privacy (and many do by accepting "Terms and Conditions" of various platforms and services) but no body has a right to forcibly take away your privacy.

"Complain to your local government representative about the attacks on E2EE."There have been repeated attempts (and will continue to be repeated attempts) to outlaw end-to-end encryption. Governments want to spy on citizens; companies want to spy on individuals to profit off their private data; organisations want private data of individuals to make discriminatory decisions about said individuals. All of these actions have negative consequences on individuals: psychological abuse, economic discrimination, racial discrimination, political discrimination, exploitative psychological advertising (the list goes on and on).

So what can you do about this? You can raise awareness, first of all. Complain to your local government representative about the attacks on E2EE. You can educate yourself about which software gives you full control over your secret keys.

"Note that operating systems and devices have constantly had back doors installed into them."Here's a list of software you can look up which gives users control over their secret keys:

1) GnuPG and Kleopatra (GNU/Linux, BSD, OSX)

2) Gpg4win and Kleopatra (Windows)

3) OpenKeychain (Mobile)

There are many books, videos, and tutorials about the tools above. They're a good point to start with.

Note that operating systems and devices have constantly had back doors installed into them. The best way to use E2EE software is to have a separate device for performing all E2EE tasks; said device should never be connected to the Internet. This is too inconvenient for some but is worth considering for those who want added level of security.

A note on hardware security tokens: Don't believe in them. Most of them are likely to have back doors in them which allow extraction of your secret keys. Use an ordinary, general-purpose computer for all E2EE tasks; preferably one that never sees the Internet. Old laptops make great E2EE machines; just turn off the WIFI and don't plug in any Ethernet cable. Devices like the Raspberry Pi are also a good candidate for an affordable system exclusively used for E2EE. You can use these devices with an HDMI cable, keyboard+mouse, and a USB stick to move data to and from the device.

Does all your data need to be E2EED? Of course not. That would be overkill. But data that you think needs to be private should be private. So use E2EE software to protect your privacy, when you see fit. This includes pictures, videos, legal documents, files containing passwords, etc.

"Old laptops make great E2EE machines; just turn off the WIFI and don't plug in any Ethernet cable."Remember: E2EE is a system in which data is encrypted so that ONLY ONE party can decrypt the data: intended recipient(s). Any system which doesn't satisfy this definition is not E2EE; don't let governments, companies, etc. convenience you otherwise.

Technical details



Say J wants to send a file F to M; J wants to encrypt F so that only M can decrypt F. We'll refer to the encrypted form of F as EF.

What would J need to do?

We'll establish a few more definitions (sorry about this but it's necessary to maintain correctness).

J and M both have keys.

E2EE software : S.

Public key of J : JPKEY Secret key of J : JSKEY

Public key of M : MPKEY Secret key of M : MSKEY

(1) J and M both use S to generate their respective key files (JPKEY, JSKEY, MPKEY, MSKEY).

(2) J needs MPKEY in order to encrypt F for M.

(3) M sends J: MPKEY, in advance (this can be done over any media as MPKEY is not required to remain private).

(4) J now has the following: S, JSKEY, MPKEY, F. J can use these to obtain EF.

(5) J sends EF to M.

(6) M now has the following: MSKEY, S, EF.

(7) M can use these to obtain F from EF.

All of the above can be done with only one person. In, that case J = M. This is when you want E2EED that is "for your eyes only".

RSA and EDDSA are considered the most secure systems for E2EE today (2020). The major weak points in any E2EE are: human error, hardware and software backdoors, hardware and software bugs. E2EE is always evolving, so what you read today may not be true tomorrow.

As with all security, there is assumed risk no matter how careful you are. There are no security guarantees but that doesn't mean you shouldn't try.

Be wary of any body that gives you guarantees.

Recent Techrights' Posts

Pushers of systemd Rewrite History (Richard Stallman Said UNIX "Was Portable and Seemed Fairly Clean")
Unlike systemd
Trajectory of The Register: From News Site/s Into "B2B"... and Into Microsoft Salespeople
Something isn't right at The Register
Doing My Share to Tackle Online Slop and SPAM
Trying my best to 'fix' the Web
Slopwatch: Fakes, FUD, Duplicates, and Charlatans Galore
The Web as we once know it is collapsing. Some opportunists try to replace it with low-quality slop.
The Register UK Seems to Have Become American and Management is Changing (Microsofter as Editor in Chief)
The Register 'UK' is now controlled by the Directions on Microsoft guy
 
When You Tell You It's Free, Does That Mean No Charges (If So, Who's Paying and Why)?
there's "no free lunch"
Most Editors at The Register Are American, Including the Editor in Chief, a Decade-Long Microsoft Stenographer (Writing Prose to Sell Microsoft)
It's not easy to tell where the site is based (we tried) because it's hiding behind ClownFlare and CrimeFlare hasn't been well lately
"New Techrights" Soon Turns 2 (A Few Days Before the FSF Turns 40)
We have a lot more to say about LLM bots
When Silence Says So Much
Garrett, a 'secure' boot pusher, will need to defend himself in the UK High Court
The Register in Trouble
There is not much that can be done at this point
Over at Tux Machines...
GNU/Linux news for the past day
IRC Proceedings: Saturday, July 26, 2025
IRC logs for Saturday, July 26, 2025
Misinformation in Social Control Media
Social control media passes around all sorts of tropes
Slopwatch: Fake Linux 'Articles' and Slopfarms With "Linux" in Their Names/Domains
throwing bots at "Linux" to make some fake articles
Links 26/07/2025: Amazon Shutdown in China, Russian Economy Slows
Links for the day
Gemini Links 26/07/2025: History of Time (1988) and Gemini Games
Links for the day
Links 26/07/2025: 50 Percent Tariffs in Amazon, Dying Intel Offloads Network and Edge Group (NEX)
Links for the day
Blaming Programming Languages for Users' and Developers' Bad Practices
That's like blaming cars for drivers who crash into things
Many People Still Read Techrights Because It Says the Truth, Produces Evidence, and Does Not Self-Censor
Unlike so many other sites
The Register is Desperate for Money, According to The Register
I decided to check how they're doing as a business
Microsoft Finally Finds a Use Case for Slop?
Create low-quality chaff to shift the media's attention?
Microsoft Windows Lost 400 Million Users in a Few Years, Why Does The Register Double Down on Windows With New US Editor?
days ago they hired a new US editor
Over at Tux Machines...
GNU/Linux news for the past day
IRC Proceedings: Friday, July 25, 2025
IRC logs for Friday, July 25, 2025
For Libel Reform One Must First Bring (or Raise) Awareness to the Issues and Their Magnitude
I myself know, from personal experience
Links 26/07/2025: Rationed Meals in the US and TikTok Repels Investments (Too Toxic)
Links for the day
Gemini Links 26/07/2025: "Bloody Google" and New People in Geminispace
Links for the day
Response to Solderpunk (Father of Gemini Protocol) About the Gemini Community
Solderpunk responds to non-sequitur
HTML and the Web Used to be Something a Child Could Learn, "Modern" Web is a Puzzle of Frameworks, Bloat, and Worse
When the Web was more like Gemini Protocol
New US Editor in The Register is 84% Microsoft/Windows Booster
It'll be worrying if it carries on like this
Links 25/07/2025: Slop Blunders and China Has Code of Conduct for Lawmakers in HK
Links for the day
Gemini Links 25/07/2025: Some Books and Babies and Capital
Links for the day
Links 25/07/2025: NOAA Cuts Endanger Lives, "Europe's Self Inflicted Cloud Crisis"
Links for the day
They Try to Lecture Us on Ethics
They even removed "master" from Microsoft GitHub
The Future of the Web is One Rendering Engine or 'Flavours' of Chrome
The future of the Web does not look bright at all
Best Sites Are Not Optimised for Any Browser, They Work Equally Well With All of Them
Red Hat (IBM) is making rubbish sites
YouTube is a Spamfarm, Slopfarm, and Clickfarm (a Lot of Numbers There Are Fake)
Those who don't fake look unpopular and unimportant
We Don't Do JavaScript and Pages Are Small
Thankfully Gemini Protocol has nothing like JavaScript
'Tech' is Not Technology
Some people use terms like 'Old Tech'
IBM's Debt Rose by Almost 10 Billion Dollars in the Past 6 Months Alone
The "hey hi" circus is coming to an end
Yes, Master
Gaslighting by actual racists
Microsoft Bribes and Buys Politicians to Tell Europe What to Do About Free Software (Which It's Attacking)
Microsoft: we speak for the thing that we are attacking! Follow the money...
Making Backups Quickly and Reliably
Backups are imperative, more so in an age of uncertainty, unpredictable weather, and worsening standards (quality of products going down while prices go up)
Techrights Investigation: Estimating the Point in Time LinuxIac Turned Into LLM Slop (Part of the Time)
Bobby Borisov got lazy
10th Month, Ten Weeks From Now, at Ten AM
In Wentworth Institute of Technology in Boston
Over at Tux Machines...
GNU/Linux news for the past day
IRC Proceedings: Thursday, July 24, 2025
IRC logs for Thursday, July 24, 2025
A Nadella Memo Distracts From Microsoft's Cheapening Of the Workforce
Right now the "MSM" (mainstream media) is flooded/overwhelmed by garbage pieces that relay lies for Nadella
Vanishing Faces of GNU/Linux
Free software projects do not depend on any one person or company to still exist
Microsoft Says It Lost 400 Million Windows Users, Now It's Waiting for GNU/Linux to Stop Booting on 'Old' PCs
When it comes to Windows, Microsoft is fully aware of the issue and statements it made earlier this summer suggest it lost 400 million Windows users
Slopwatch: LinuxTechLab, linuxsecurity.com, LinuxIac, and More
Also: The Register's Microsoft agenda (new editor)
Gemini Links 25/07/2025: Gemtext Aware Titan Editor and Gemini Protocol Comeback
Links for the day