Method and an apparatus for securely signing application data

The invention provides a method and apparatus for the secure electronic signing of electronic documents and data. The method comprises the steps of: obtaining a first digital representation in a high level first data format of the set of application data; generating a second digital representation in a low level second data format of the application data whereby the low level second data format is different from the high level first data format; presenting an analog representation of the set of application data to a user, whereby the second digital representation is a precise and accurate representation of said analog representation; obtaining an indication whether the user approves the analog representation for signing; if the indication indicates that the user approves the analog representation for signing, generating the first digital signature over the second digital representation using a first signature key associated with the user.