Original sentence: On Usenet and his website, Bernstein has publicly argued with Wietse Venema and Paul Vixie about software and security, with Matteo Frigo, author of FFTW, about FFT implementation and benchmarking, and with Bruce Schneier and Arjen Lenstra about computational cost
Edited sentence: Bernstein is a controversial figure.On Usenet and his website, he has publicly argued with Wietse Venema and Paul Vixie about software and security, with Matteo Frigo, author of FFTW, about FFT implementation and benchmarking, and with Bruce Schneier and Arjen Lenstra about computational cost