There are few sectors as exciting to investors these days as cybersecurity, thanks to the never-ending barrage of online attacks on governments, companies and individuals. Now two of the best known cybersecurity startups are seeking to capitalize on that interest with new fundraising moves aimed at the public and private markets.     

One of those companies, CrowdStrike, is in the process of raising another significant round of funding, according to three people with direct knowledge of the efforts, while the other, Cylance, is talking to bankers in preparation for an initial public offering, people close to the company said. Neither move has been previously reported.