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e-sushi
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sign Signing a message to make sure that it will not be tampered with when forwarded, without trusting the receivers?

Lets say there are 3 people.

  • 1st signs a message and sends it to 2nd using public key encryption
  • 1st deletes the message
  • 1st tells 2nd to forward his message
  • 2nd forwards the message to 3rd

How can 1st verify the message was forwarded untampered without trusting 2nd or 3rd and without finding out the message contents again?

A terrible idea is to have 3rd give his private key to a 4th who will confirm to 1st that his message was untampered.

I am new to this so if what I want to do is impossible a heads up would be deeply appreciated. Thanks in advance.

sign a message make sure that it will not be tampered with when forwarded without trusting the receivers

Lets say there are 3 people.

  • 1st signs a message and sends it to 2nd using public key encryption
  • 1st deletes the message
  • 1st tells 2nd to forward his message
  • 2nd forwards the message to 3rd

How can 1st verify the message was forwarded untampered without trusting 2nd or 3rd and without finding out the message contents again?

A terrible idea is to have 3rd give his private key to a 4th who will confirm to 1st that his message was untampered.

I am new to this so if what I want to do is impossible a heads up would be deeply appreciated. Thanks in advance.

Signing a message to make sure that it will not be tampered with when forwarded, without trusting the receivers?

Lets say there are 3 people.

  • 1st signs a message and sends it to 2nd using public key encryption
  • 1st deletes the message
  • 1st tells 2nd to forward his message
  • 2nd forwards the message to 3rd

How can 1st verify the message was forwarded untampered without trusting 2nd or 3rd and without finding out the message contents again?

A terrible idea is to have 3rd give his private key to a 4th who will confirm to 1st that his message was untampered.

I am new to this so if what I want to do is impossible a heads up would be deeply appreciated.

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sign a message make sure that it will not be tampered with when forwarded without trusting the receivers

Lets say there are 3 people.

  • 1st signs a message and sends it to 2nd using public key encryption
  • 1st deletes the message
  • 1st tells 2nd to forward his message
  • 2nd forwards the message to 3rd

How can 1st verify the message was forwarded untampered without trusting 2nd or 3rd and without finding out the message contents again?

A terrible idea is to have 3rd give his private key to a 4th who will confirm to 1st that his message was untampered.

I am new to this so if what I want to do is impossible a heads up would be deeply appreciated. Thanks in advance.