8 stories
·
0 followers

Longest (Partial) Lunar Eclipse in Centuries Later This Week

1 Share

On late Thursday, November 18, and early Friday, November 19, those watching the sky over much of the globe will see the longest partial lunar eclipse in almost 600 years. The eclipse will last for nearly 3 and a half hours and will be very near to, but not quite, a full lunar eclipse.

The eclipse will take place with a Beaver minimoon, so-called because the November moon is often colloquially called the Beaver moon and since the moon is also close to its apogee, or farthest point in its orbit, is slightly smaller in the sky and is referred to as a minimoon or micromoon.  Click here for detailed times for the eclipse on the US East Coast.


Partial Lunar Eclipse November 18-19 2021

The post Longest (Partial) Lunar Eclipse in Centuries Later This Week appeared first on Old Salt Blog.

Read the whole story
agwego
20 days ago
reply
Share this story
Delete

Appleā€™s NeuralHash Algorithm Has Been Reverse-Engineered

4 Comments and 10 Shares

Apple’s NeuralHash algorithm — the one it’s using for client-side scanning on the iPhone — has been reverse-engineered.

Turns out it was already in iOS 14.3, and someone noticed:

Early tests show that it can tolerate image resizing and compression, but not cropping or rotations.

We also have the first collision: two images that hash to the same value.

The next step is to generate innocuous images that NeuralHash classifies as prohibited content.

This was a bad idea from the start, and Apple never seemed to consider the adversarial context of the system as a whole, and not just the cryptography...

Read the whole story
agwego
109 days ago
reply
Share this story
Delete
4 public comments
guilhermea
109 days ago
reply
People knew it was bound to happen, but this early? Wow.
London, England
jgbishop
109 days ago
reply
Got to love when Apple blows it!
Durham, NC
freeAgent
109 days ago
reply
I wonder if we'll see people creating false positives in order to frame others OR in order to jam up Apple's system with lots of false positives. Or both. Probably both.
Los Angeles, CA
zippy72
107 days ago
I can think of at least two governments that are probably working on the former. There's a few hackers on Twitter who claim to be working on the latter.
MotherHydra
109 days ago
reply
Clearly something that while helpful on its face has immense (possibly impossible) technical hurdles to overcome lest innocent people get flagged.
Space City, USA

Texas Instruments new TI-84 Plus CE Python graphing calculator

1 Comment
Comments
Read the whole story
agwego
125 days ago
reply
Neat
Share this story
Delete

Researchers use Rowhammer bit flips to steal 2048-bit crypto key

1 Share
Comments
Read the whole story
agwego
903 days ago
reply
Share this story
Delete

Using Let's Encrypt for Internal Servers

1 Comment
Comments
Read the whole story
agwego
1000 days ago
reply
Nice
Share this story
Delete

German federal office BSI publishes Telemetry analysis

1 Share
Comments
Read the whole story
agwego
1106 days ago
reply
Share this story
Delete
Next Page of Stories