[XMR] Technical questions thread re: crypto & protocol

[keystroke]

How does the Monero wallet decide what other signatures to use to sign a transaction when I say to use n signatures? Does it select them randomly from the blockchain?

      crypto::generate_ring_signature(tx_prefix_hash, boost::get<txin_to_key>(tx.vin).k_image, keys_ptrs, in_contexts.in_ephemeral.sec, src_entr.real_output, sigs.data());