Secure transaction unit, electronic token transaction system, and method in a secure transaction unit

A secure transaction unit for use in an electronic token transaction system, the secure transaction unit comprising:

• a secure element;
• and
• a special secure element for temporary offline storing of history data related to tokens being transacted within offline token transactions;
• wherein the secure element comprises:
• a secure element computing unit configured for receiving at least one token from another secure element when performing an offline token transaction between the secure element and the other secure element;
• wherein the special secure element comprises:
• a special secure element computing unit configured for directly or indirectly receiving history data, the received history data being related to the at least one token received by the secure element from the other secure element, for temporary offline storing of the received history data, and for registration of the at least one received token in a token register, by providing the temporarily stored history data to the token register.