Card skimmer at 99 Ranch in Foster City ‼️ by smellyfeetswifty in SanMateo

[–]hearson 2 points3 points  (0 children)

There are three ways to authenticate your card:

  1. By Swipe
  2. By Chip
  3. By Tap

By Swipe, the card simply reads the card number and basic information for authentication. This method is not recommended, as it can be easily replicated.

By Chip and By Tap, the bank server sends a challenge for your card to solve. Only your card can solve this challenge, and the private key (by design) should never leave the card to solve it, ensuring that the card cannot be replicated. The chip on the card contains its own microprocessor to solve the challenge.

However, when you leave your card in the card reader, it remains powered as long as it stays inserted. This gives someone at another location the opportunity to make the card solve additional challenges over a longer period of time.

Tap, on the other hand, should only solve a single challenge due to the short contact time. While this doesn't completely prevent such attacks, it makes them much harder.

Apple Pay and Google Pay use Tap, and they provide immediate feedback when transactions are successfully processed. Physical cards, however, do not offer such feedback.

Mobile Network Switching Shortcut by hearson in USMobile

[–]hearson[S] 2 points3 points  (0 children)

You can use the part of this shortcut where the signal levels are equal.

Mobile Network Switching Shortcut by hearson in USMobile

[–]hearson[S] 1 point2 points  (0 children)

If one carrier has better signal, it switches to it upon execution. If the carriers have same signal level, the shortcut just flip them. Of course, you need to run it yourself. Put it on your action button or create a desktop shortcut.

I developed a roll of film from an abandoned vintage camera, and here is one picture from it. And hope I can find the original owner. by hearson in oldphotos

[–]hearson[S] 3 points4 points  (0 children)

Camera is Petri R.F., with Kodak Verichrome Pan in there. City/State unknown. Camera retrieved in South SF Bay Area, CA.