Questions tagged [ecdh]

I am reading the technical "specification" for stealth addresses, available here. The core idea is described in the following paragraph: Using Elliptic curve Diffie-Hellman (ECDH) we can generate a shared secret that the payee can use to recover…

Peter Dettman notes that ECDH peers can waste each other's time at will. What does he mean? Can this be weaponized against Lightning nodes?

In confidential transaction proposed by Maxwell, instead of transaction amounts we use pedersen commitments to hide the amount and add the range proof to the transaction to prevent overflow. A simple commitment with one input and one output C1 and…

I understand that: pubkey(a + b) = pubkey(a).combine(pubkey(b)) where a and b are secret keys. (See: https://crypto.stackexchange.com/q/83694/17505) If, under the circumstances: Bob wants to pay Alice, by creating transaction output whose private…