The encryption of data transmitted between the client and the bank prevents unauthorized detection of sensitive information by a third party. The use of the correct encryption key (which is stored in the client's mobile phone) is also one of the elements of client authentication. The latest algorithm, a successor of the 3DES, AES algorithm, is used for encryption.
The use of the MBA is protected with a PIN that is required by the application when launched.
Optionally, the security of the MBA can be further strengthened by using an independent authentication element (a token, code table—TAN, or grid card) to authenticate the client and submitted transactions.