So easy & Supafast
XUMM is a non custodial client (wallet) for the XRP Ledger, with superpowers. XUMM allows you to interact with the XRP Ledger and 3rd party tools while keeping your keys super safe. XUMM supports signing all XRP ledger transactions, like payments & escrows. Xumm Tutorial
In terms of the XRP Ledger, a trust line is an object owned by a wallet that specifies what address is trusted for which asset code. Creating a trust line does not expose your wallet to any attack.