3 ms·

They are also used to stop quotes and documents from being changed once they are sent to others.

munk-a 7y ago
There are other better ways to accomplish that like lodging a document with a third party to ensure a lack of changes... regarding quoting... preventing text capture is a futile effort that really needs to stop existing - it's a pain to deal with and provides no real security since, much like snapchat - you can never counter someone taking a picture of the screen.
- JaimeThompson 7y ago
  Yes there are better ways but for a lot of small businesses those better ways simply do not get paid. It isn't how it should be and it will take a long time for things to change.
- nitrogen 7y ago
  you can never counter someone taking a picture of the screen. Except with digital watermarks. Photocopiers generally recognize things like currency and refuse to copy at high fidelity. The PS3 I believe would refuse to play ripped cinema soundtracks all the way through, using audio watermarking. It's conceivable that cameras could be required to do the same thing for digital restriction watermarks.
  - ptx 7y ago
    Even if they conspire with every camera manufacturer, they can't prevent someone from just retyping the text they want to quote. On a mechanical typewriter if necessary. I guess they could try to do a denial of service attack on the typist by deliberately overusing letters from the same vertical keyboard row to wear out the finger.
- JaimeThompson 7y ago
  Quote as in sending them a quote for product and/or services.
  - munk-a 7y ago
    Ah okay, so you don't actually care about the selectability - just the immutability. In that case a third party is the answer and has been the answer forever - if only the bank has a paper record of your mortgage then you have no guarantees they won't alter that contract on the sly - if it's lodged with a mutually trusted third party that doesn't have a vested interest with either participant then you're safe. The best I've ever seen with physical documents is a guarantee that the document hasn't been tampered with, but there isn't really a way to prove which document is the real document.

There are other better ways to accomplish that like lodging a document with a third party to ensure a lack of changes... regarding quoting... preventing text capture is a futile effort that really needs to stop existing - it's a pain to deal with and provides no real security since, much like snapchat - you can never counter someone taking a picture of the screen.

JaimeThompson 7y ago
Yes there are better ways but for a lot of small businesses those better ways simply do not get paid. It isn't how it should be and it will take a long time for things to change.
nitrogen 7y ago
you can never counter someone taking a picture of the screen. Except with digital watermarks. Photocopiers generally recognize things like currency and refuse to copy at high fidelity. The PS3 I believe would refuse to play ripped cinema soundtracks all the way through, using audio watermarking. It's conceivable that cameras could be required to do the same thing for digital restriction watermarks.
- ptx 7y ago
  Even if they conspire with every camera manufacturer, they can't prevent someone from just retyping the text they want to quote. On a mechanical typewriter if necessary. I guess they could try to do a denial of service attack on the typist by deliberately overusing letters from the same vertical keyboard row to wear out the finger.
JaimeThompson 7y ago
Quote as in sending them a quote for product and/or services.
- munk-a 7y ago
  Ah okay, so you don't actually care about the selectability - just the immutability. In that case a third party is the answer and has been the answer forever - if only the bank has a paper record of your mortgage then you have no guarantees they won't alter that contract on the sly - if it's lodged with a mutually trusted third party that doesn't have a vested interest with either participant then you're safe. The best I've ever seen with physical documents is a guarantee that the document hasn't been tampered with, but there isn't really a way to prove which document is the real document.