The phrase "a major security challenge" is correct and usable in written English.
It can be used when discussing significant threats or difficulties related to security in various contexts, such as cybersecurity, national defense, or organizational safety.
Example: "The rise of cyberattacks poses a major security challenge for businesses worldwide."
Alternatives: "a significant security issue" or "a critical security concern."
As a result, it is a major security challenge for CPS to safely distribute massive amounts of data to the clients with limited resources.
Distributed denial of service (DDoS) attacks are not a new threat, but remain a major security challenge and are a topic of ongoing research interest.
However, as regional states and their international partners gather in Abuja on Saturday to discuss their strategy, Boko Haram remains a major security challenge requiring a coordinated response.
Four high-profile attacks on civilians – in Xinjiang and in two cities elsewhere in China – since October have handed a major security challenge to the president and Communist party leader, Xi Jinping, during his first 18 months in office.
North Korea is certain to pose a major security challenge, probably early on in Trump's presidency, as it consolidates its nuclear and missile arsenal – testing out Trump's willingness to "deal".
And Mr. Putin, who is engaged in a critical opening dialogue with President Bush, is able to demonstrate to those who see Russia as a declining power that it stands as a crucial bridge to the rest of Asia, especially to China, which is regarded by Mr. Bush and his advisers as a major security challenge.
The worm was Facebook's first major security challenge and remains the most persistent threat on the site.
Asean's leading envoys have spent days wrangling over how to respond to the ruling amid splits, acrimony and fears that the bloc is faltering in its response to the major security challenge of the day.
Crossbencher and former chief of the general staff Lord Stirrup focuses on the "major security challenges" posed by a region "frozen in a divided state between two very different countries".
With major security challenges there, they are already budgeting for a huge deficit.
The UK National Security Strategy recognises that in today's globalised world infectious diseases are among the major security challenges, and that the highest risk is an influenza-type pandemic [ 153].
