Forgot your password?

Comment: Re:Now I'm confused ... (Score 3, Insightful) 380

by jcochran (#47327837) Attached to: New Chemical Process Could Make Ammonia a Practical Car Fuel

Unfortunately, it needs to be anhydrous ammonia.
Looking at the paper, what they're doing is

1. Convert sodium amide into metallic sodium, hydrogen, and nitrogen.
2. Convert ammonia and metallic sodium into sodium amide and hydrogen.

They can easily balance those two reactions.
However, if there's any water in the system, there will be a 3rd reaction going on as well.
3. Convert water and metallic sodium into sodium hydroxide and hydrogen.
That 3rd reaction would effectively consume the sodium prevent it from making more sodium amide.

Given how nasty anhydrous ammonia is, I definitely know I wouldn't want to be anywhere near an accident involving it.

Comment: Re:Except, of course, they have to prove you can (Score 1) 560

by jcochran (#47326331) Attached to: Mass. Supreme Court Says Defendant Can Be Compelled To Decrypt Data

As all the other posters have already mentioned, your plan won't work. But way back when was finally forced to reveal through the legal system, the real email address of a user, I did a bit of a mental exercise.

How could someone create a pseudonymous remailer that would be extremely hard if not impossible to break through the legal system?

The scheme I thought up was as follows.
      1. Maintain an encrypted database of email addresses and pseudonyms.
      2. Have the key to the above mentioned database stored only in RAM and never written to any persistent storage.

The above scheme would work, but power failures and reboots would effectively destroy the database so it's not a complete solution. But to work around the power issues, add the following.
      3. A UPS to minimize power issues (not really required, but will reduce the down time)
      4. Have the key split into multiple parts and have those parts sent to multiple trusted parties in multiple legal jurisdictions. There's plenty of secret splitting techniques out there to do this. And if your escrow parties happen to be in the USA, Finland, Italy, Switzerland, etc., it would be rather difficult to have enough of them divulge the key portion that they've been entrusted with. And of course, have those parties instructed to destroy their key portion if they ever discover that legal proceedings have been engaged against you. And of course, have your lawyer instructed to inform those parties as well.

So in the above situation if you lose power, or need to reboot, the system will be in an unusable state, but will contact the escrow parties to retrieve the key parts and reconstruct the encryption key. Once this happens, it resumes normal operation. But most other governmental attacks would have a very slight chance of success.

Of course, other refinements could be added such as a periodic "ping" to the escrows informing them that things are still OK. If a sufficiently long time elapses without such a keep alive ping being received, the escrow would delete the key portion entrusted to it.

To break such a system would be extremely difficult.

Comment: Re:Except, of course, they have to prove you can (Score 2) 560

by jcochran (#47325733) Attached to: Mass. Supreme Court Says Defendant Can Be Compelled To Decrypt Data

Wouldn't work.


It's standard forensic practice to make bit level copies of media and examine the copies, not the original material. Your software can do anything it wants to with the USB stick and an overwrite simply means that a new copy is made from the original (using software and hardware under the investigators control) and they get to try again.

Comment: Re:Well, this won't backfire! (Score 1) 268

by jcochran (#47314937) Attached to: Wikipedia Editors Hit With $10 Million Defamation Suit

You just might want to take a look at the comment on the edit made to Yank Barry's wikipedia entry at 9:21 25 Jun 2014... The URL is and to save you time, here's the comment

  (Court cases: I expect we'll have better sources than TechEye sooner rather than later. And shortly after that, we can update Streisand effect.)

Unless you're willing to claim that all the editors of Wikipedia are geeks, then it looks like the Streisand effect is gonna have another edit in the near future.

Comment: Doesn't really say much (Score 4, Informative) 276

by jcochran (#47310709) Attached to: Federal Judge Rules US No-fly List Violates Constitution

The ruling doesn't ban the no fly list, it merely requires the government to make a suitable appeal process for those who are on the list. So you may expect the list to still be in use for quite a while. Additionally, Judge Brown is only on the Oregon district. So her ruling only applies to Oregon (however, it will be used as a precedent in other districts). All in all, it's still a very good ruling, but there's still a long ways to go.

Comment: Mostly a repeat. (Score 1) 104

by jcochran (#47265691) Attached to: 3-D Printing with Molten Steel (Video)

Interesting article, however, I suspect the editors are a bit mistaken. I strongly suspect that Mr Delaire is NOT using TIG welding in his machine, but instead is using MIG welding. Also I have to wonder if Mr Delaire is aware of
If not, he may be able to save a bit of effort and time by building upon the work someone else has already done.

Comment: Re:And the winners are... (Score 4, Informative) 164

by jcochran (#47250279) Attached to: Endurance Experiment Writes One Petabyte To Six Consumer SSDs

You might want to do a bit of math before making such a statement. 700TB is a very large amount of data. And in order to do that in a week, would require quite a bit of data transfer bandwidth. To wit:

700,000,000,000,000 / 7 days = 100,000,000,000,000 / 24 hours = 4,166,666,666,666 / 3600 seconds = 1,157,407,407 bytes per second.

Do you really write 1.157GB/second every second for a week? And if so, what data interface are you using? I'd really like to know since SATA 3.0 can only handle 600MB/second. Perhaps you're using SATA 3.2 which does have the required speed?

Now in an environment using multiple drives, you can get to the 700TB mark much more rapidly with much lower per drive bandwidth. But then again, that's not the test criteria. They are testing how much endurance individual SSDs have.

Comment: Re:Measure blood directly (Score 1) 75

by jcochran (#47249691) Attached to: Artificial Pancreas Shows Promise In Diabetes Test

Do you make it something that attaches to the outside of the skin for power (ie: a small battery)? Or cut the person open whenever the battery starts flaking out? If the latter, we have new members of the zipper club instantly.

Seems that such a device would be an ideal candidate for inductive coupling. Both for charging and data transmission. The device would consist of two parts. One part implanted into the body, and a second part held on the skin over the implant. That would avoid a semi-permanent skin penetration acting as an infection risk.

The closest to perfection a person ever comes is when he fills out a job application form. -- Stanley J. Randall