Public holidays celebrated in Spain include a mix of religious (Roman Catholic), national and regional observances. Each municipality is allowed to declare a maximum of 14 public holidays per year; up to nine of these are chosen by the national government and at least two are chosen locally. Spain's National Day (Fiesta Nacional de Espaa) is 12 October, the anniversary of the Discovery of America and commemorate Our Lady of the Pillar feast, patroness of Aragon and throughout Spain.
There are many festivals and festivities in Spain. Some of them are known worldwide, and every year millions of people from all over the world go to Spain to experience one of these festivals. One of the most famous is San Fermn, in Pamplona. While its most famous event is the encierro, or the running of the bulls, which happens at 8:00 am from 7 to 14 July, the week-long celebration involves many other traditional and folkloric events. Its events were central to the plot of The Sun Also Rises, by Ernest Hemingway, which brought it to the general attention of English-speaking people. As a result, it has become one of the most internationally renowned fiestas in Spain, with over 1,000,000 people attending every year.
Other festivals include the carnivals in the Canary Islands, the Falles in Valencia or the Holy Week in Andalusia and Castile and Len.
Some places to visit are:
Tanggedu Waterfall, 26 kilometers from capital city Waingapu.
Puru Kambera Beach, 26 kilometers from capital city Waingapu, a one-hour drive
Tarimbay Bay, 120 kilometers from Waingapu, a five-hour drive, is a surfer paradise with 2- to 3-meter tall waves between June and September.
Watu Mandorak Cove, a white sandy beach with cliffs, a two-hour drive, and 42 kilometers from Tambolaka in the dry season. It takes longer and is not recommended in the rainy season.
The island's most popular resort is the Nihiwatu Resort, which has been ranked as one of the world's five best eco-hotels and was awarded the worlds best hotel of 2016 from Travel + Leisure for its native ambiance and authentic local experience. Despite its expensive rates, the resort has been fully booked.
On 8 October 2015, Marc Stevens, Pierre Karpman, and Thomas Peyrin published a freestart collision attack on SHA-1's compression function that requires only 257 SHA-1 evaluations. This does not directly translate into a collision on the full SHA-1 hash function (where an attacker is not able to freely choose the initial internal state), but undermines the security claims for SHA-1. In particular, it is the first time that an attack on full SHA-1 has been demonstrated; all earlier attacks were too expensive for their authors to carry them out. The authors named this significant breakthrough in the cryptanalysis of SHA-1 The SHAppening.
The method was based on their earlier work, as well as the auxiliary paths (or boomerangs) speed-up technique from Joux and Peyrin, and using high performance/cost efficient GPU cards from NVIDIA. The collision was found on a 16-node cluster with a total of 64 graphics cards. The authors estimated that a similar collision could be found by buying US$2,000 of GPU time on EC2.
The authors estimate that the cost of renting EC2 CPU/GPU time enough to generate a full collision for SHA-1 at the time of publication was between US$75K120K, and note that is well within the budget of criminal organizations, not to mention national intelligence agencies. As such, the authors recommend that SHA-1 be deprecated as quickly as possible.