Technische Universitat Clausthal
The authors presented the first smart card implementation of a forward secure signature scheme. The results presented in section 4 shows that the implementation is practical and that key generation can be done on the card in less than a minute. This is in contrast to previous implementations of similar schemes that did not achieve on-card key generation. To achieve this, they introduced XMSS+, an improved version of XMSS. Besides the improved key generation, the worst case signing time is also reduced. While the presented improvement is necessary for an implementation on smart cards, it might also show to be useful for implementations on other hardware (At least in cases, where key generation time or worst case signing time are critical).