We present the first records of Lindsaea leprieurii Hook. and angustipinna A.Rojas & Tejero from Panama. Images, taxonomic comments, conservation assessments, geographic notes are provided.

We present a practical attack on the Panama hash function that generates a collision in 2 evaluations of the state updating function. Our attack improves that of Rijmen and coworkers that had a complexity 2, too high to produce a collision in practice. This improvement comes mainly from the use of techniques to transfer conditions on the state to message words instead of trying many message pai...