Problems of security of the asymmetric cryptographic algorithm RSA are considered, which might occur when choosing small values of public keys and related plaintexts and a development of the well known in these cases cryptoattack of Franklin-Reiter-Coppersmith is offered.
The present catalogue of the ants (Hymenoptera, Formicidae) of Bulgaria is made on a base of critical reconsideration of literature (covering the period from 1892 till 2009 and part of 2010) as well as on examination of the authors' and several museum's collections. A lot of data were omitted in the previous Bulgarian monograph on ants, lots of new data… (More)
The invasive garden ant Lasius neglectus (Hymenoptera: Formicidae) has been spreading rapidly in Europe ever since the 1990s. This ant established enormous supercolonies in many European cities and poses a serious threat to the local native faunas. The spread of this species has not slowed down in the last decades, but in the recent years the sizes of the… (More)
We give the results from the first investigation focused on the land snail fauna in Srebarna Nature Reserve in Bulgaria. A total of 23 localities were studied and 27 species of terrestrial gastropods were found, 23 of which were new observations for the Reserve.
The four authors are well-known in the field of European myrmecology. Research on the myrmecofauna of Poland has a long history. Due to the continuity in the work of myrmecologists of different generations, it seems likely that their good work will be extended successfully into the future. The fruitful work of the late Prof. Bohdan Pisarski has been… (More)