Seems that there is a deliberate backdoor in the twenty-year-old TErrestrial Trunked RAdio (TETRA) standard used by police forces around the world. //

Looks like the encryption algorithm was intentionally weakened by intelligence agencies to facilitate easy eavesdropping. //

And I would like to point out that that’s the very definition of a backdoor.

Why aren’t we done with secret, proprietary cryptography? It’s just not a good idea. //

Clive Robinson • July 26, 2023 11:51 AM

@ Bruce, ALL,

Re : It started in WWII.

“Why aren’t we done with secret, proprietary cryptography? It’s just not a good idea.”

Remember this actually goes back well into the last century, that is it’s more than 20years old.