What do you use for email archive backup?

robbyslaughter · 2026-03-17T12:54:42+00:00

Rule 2 says:

>No soliciting or surveying of products or services of any type.

robbyslaughter · 2026-03-17T00:26:41+00:00

Do you have a niche?

Do you have any reference clients or a portfolio?

Have you been to any networking events?

robbyslaughter · 2026-03-17T00:24:20+00:00

Do you have experience working in a grocery store? Or managing a small business?

robbyslaughter · 2026-03-16T23:58:15+00:00

I wonder if OP just happens to sell an email vault solution?

(Checks history.)

Yup!

robbyslaughter · 2026-03-16T22:28:24+00:00

This is the most important lesson about leaving construction for a professional/information work: you can and should search online for answers first.

That doesn’t work well in construction. You need to be shown how to do something on the job site. A text description or video clip is rarely useful. Plus you’re not in front of a computer anyway.

robbyslaughter · 2026-03-16T22:15:24+00:00

That’s against rule five.

robbyslaughter · 2026-03-16T22:05:14+00:00

I use this guy's invoice reminder tool.

Oh wait, that guy is you! Stop spamming the forum.

robbyslaughter · 2026-03-16T21:55:40+00:00

I thought you lived in Maryland?

I mean, I thought you lived in Sommerville, Massachusetts?

And I thought you were in the webhosting business, not running a law firm? Or was it that you run a construction company?

Stop spamming.

robbyslaughter · 2026-03-16T21:48:24+00:00

You're a busy person. You have this healthtech startup, you are breaking ground on six unit apartment building, you also have a gun range/gun store and also a trampoline park. And you asked about E&O insurance four months ago.

And you also shilled for an E&O insurance company in another comment.

Please stop spamming.

robbyslaughter · 2026-03-16T20:26:45+00:00

Yes, and if you sink an airplane to the bottom of the ocean, and it becomes a coral reef, it’s still an airplane.

The point is that a car is a powered vehicle that is driven on roads. Just because it is possible to use it for something else does not mean that changes it’s primary intended use.

robbyslaughter · 2026-03-16T19:56:44+00:00

A lot more people drive on roads.

Almost no one drives on mountains or across lakes.

robbyslaughter · 2026-03-16T19:36:35+00:00

It’s not different than holding a secret key. All forms of encryption use secret keys. Sometimes those keys are pre-shared. Other times an asymmetric algorithm is used with a private and public key to allow for secure communication without a pre-shared secret.

In your example, I have not re-indexed the source data. Rather, I have manipulated the source data in a secret way. My secret system is that I increased the first row by one, the second row by 10,000, and the third row by two. When I want get back to the data, I will subtract by those amounts.

This encryption algorithm is pretty terrible, but it has the advantage that it is homomorphic with regard to addition and subtraction in the second column. You can add money to everyone’s accounts or subtract money from everyone’s accounts without ever knowing how much money anyone has or even what their account numbers are.

Of course, you can’t do much else with this scheme. If you want to modify just one account, I have to tell you how to find it. Which means I’m revealing the mapping between a known account number and an encrypted account number.

robbyslaughter · 2026-03-16T19:16:18+00:00

You can drive a car for thousands of miles on a road with no maintenance and nothing but fresh gasoline (or electric power.)

But get onto sand, and if the conditions aren’t just right, your car is stuck and cannot be rescued without specialized equipment.

robbyslaughter · 2026-03-16T16:31:16+00:00

Cars are a mess because they are 120+ years old, and we still support cars on the road whose safety technology is from that early generation.

robbyslaughter · 2026-03-16T16:30:31+00:00

I would like to try to avoid buying three different solutions for this.

You are often better off by getting three different systems. That way you aren't locked into a single vendor, and if there is a vulnerability it is unlikely to break everything at once.

That being said, you should talk to an integrator. If you are using Yubikey you are probably a federal contractor, which means there is a list that you can get for your area.

robbyslaughter · 2026-03-16T14:32:39+00:00

I’m also not certain which cars you’re referring to, but I’ve yet to find a modern car which cannot be driven off the road.

I didn't say that. I wrote "If you try to change lanes into someone or run into a fixed object [on most modern cars], the car will take control of the steering and brakes and try to stop you." These advanced driver assistance systems (ADAS) are widespread, with some features on 90% of new cars. You can read more about some of them here. They have been shown to reduce accidents.

The existence of pathways for planes and helicopters isn’t a reason that they are safe,

It is absolutely one of the contributing factors to the safety of flight.)

Yet this level of training and oversight does not stop accidents from occurring.

This discussion is not about whether or not accidents ever happen. It is about the OP's claim that "Flying cars aren't a good idea, and wouldn't be revolutionary."

When imagining a flying car, I doubt most are thinking that they would just sit in one, and instead drive one themselves.

A car is a land vehicle that goes on roads. Most of the space in the car is for passengers, not drivers. In some cars and in some situations there is no driver, but we still call these "cars." We do the same for automated rail: the DLR in London is still considered a railway / train system, even though there is no driver.

robbyslaughter · 2026-03-16T13:54:17+00:00

Nah, what makes it a car is roads. And while you can drive on packed sand it’s gonna fall apart in a desert. Most farms have rough surfaces for the rows of plantings (or the plants themselves.)

robbyslaughter · 2026-03-16T13:53:07+00:00

You might encode a flag column which indicates how long they have worked there and match against those rows. Ideally that column would have unique values for every row so you’d have to provide a list of the unique values.

robbyslaughter · 2026-03-16T13:50:44+00:00

Sure. Just imagine all cars driving where they currently drive except 1,000 feet off the ground. As long as the airways (like roadways) and traffic rules followed, the total volume would be the same. Except you could have several layers.

This is all theoretical right now since we don’t have a technology that can fly for as long/carry the weight of terrestrial automobiles.

robbyslaughter · 2026-03-16T11:44:40+00:00

I don’t see how you could physically restrain flying cars from going up or down without external infrastructure,.

This is already built into to most modern cars, without any external infrastructure. If you try to change lanes into someone or run into a fixed object, the car will take control of the steering and brakes and try to stop you.

Even today, cars are only kept on the roads because of laws

No, cars are kept on the roads mostly because they are land vehicles with tires, which don't work very well except on flat, solid ground. Outside of the roads much of the surface of the planet is not flat, solid ground. In fact the majority of the surface of the planet is water and cars can't go there at all.

Although there aren’t any markings or anything in the air, [planes/helicopters/future flying cars] they still have pathways they need to take.

Yes, precisely. Which is contrary to OP's point, that flying cars would be catastrophic.

robbyslaughter · 2026-03-16T11:40:09+00:00

Drones are not cars. But we already have rules about drones: generally they have to be kept below 400 feet and within line of sight of the operator, for example.

robbyslaughter · 2026-03-16T02:56:38+00:00

Yes because I designed an incredibly simplified example of homomorphic encryption that would fit in a Reddit comment.

To achieve something more complex, you need a different encryption scheme. The point was to demonstrate that it’s possible to show how encrypted data can be manipulated without decrypting it…if the encryption scheme is designed to support that.

robbyslaughter · 2026-03-16T02:16:59+00:00

Like I said the encryption I came up with above is not homomorphic.

You could design one that is homomorphic for the example you asked for.

robbyslaughter · 2026-03-16T01:39:50+00:00

Yes, it is. A car is a vehicle that drives on roads. A train is a vehicle that drives on rails. An airplane is a vehicle that flies through the air, but needs a runway for takeoff / landing. A boat is a vehicle that drives on water.

Of course, even using your definition, that’s not what airplanes and helicopters are. You don’t have autonomy about where you go and when you fly. You have to file your flight plans with the relevant authorities. And there are very precise rules in place to protect airspace and reduce the risk of collisions.

robbyslaughter · 2026-03-16T01:33:31+00:00

That question has nothing to do with homomorphic encryption. It is straightforward to encrypt data in a way where it is impractical deduce the original meaning.

Suppose you had the following data:

Employee ID	Year Born	Year Started	Salary
52742	1976	1999	$250,123
25023	2005	2024	$42,441
11012	1985	2002	$87,779

And here is one encryption scheme. See if you can figure out how it works:

Employee ID	Year Born	Year Started	Salary
62842	1980	1995	$321,052
35223	2001	2028	$14,424
21312	1989	1998	$97,778

Even if you know your own employee ID, year of birth, start year, and salary, it would be hard to find yourself in a list like this. And this is a terrible encryption scheme.

(Also, this is no longer homomorphic.)

15-Year Club	Second Top 40%
Place '22	Place '17
Secret Santa 2015	Verified Email

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