Abstract: A method is provided for securing access to wallets in which crypto currencies and/or their secrets are stored. The method uses a transaction server on which transaction logic runs to perform a transaction with a client device controlled by a user. A user password and a unique ID are assigned to each user with a wallet server on which the wallets are managed, For the termination of a transaction, the access from the transaction server to the wallet server is based on the user password, an asymmetric server key pair, and a symmetric user key per user.