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.