The phrase "a security breakdown" is correct and usable in written English.
It can be used to describe a failure or malfunction in security systems or protocols, often in contexts related to cybersecurity or physical security.
Example: "The company experienced a significant security breakdown, leading to unauthorized access to sensitive data."
Alternatives: "a security failure" or "a security breach".
One day in early 2009, a security breakdown in The Observer's computer system allowed employees access to one another's hard drives.
ALBUQUERQUE, Sept. 29 (AP) — The Department of Energy has fined the University of California $3 million for a security breakdown at Los Alamos National Laboratory last year.
The Energy Department proposed $3.3 million in fines against managers of the Los Alamos nuclear weapons laboratory because of a security breakdown in which classified documents were found in a trailer-park drug raid in northern New Mexico.
The drivers would have had to pass through two checkpoints at the government compound before reaching the last gate, which raised the prospect that a security breakdown was responsible for the disaster.
Moreover, in the words of a Western diplomat, "he talks less and listens more".Two weeks ago he flew down to Iraq's biggest southern city, Basra, to impose a state of emergency and knock together the heads of quarrelling Shia factions whose bickering had contributed to a security breakdown.
Fearing a further security breakdown, the U.S. Embassy in Cairo on Wednesday ordered the mandatory evacuation of all personnel deemed nonessential.
Yahoo Inc. announced Thursday that personal information in at least 500 million accounts was stolen in a massive security breakdown in 2014.
A "near-universal" security breakdown was also blamed, leaving the artifacts vulnerable to theft.
Juan Zarate, who was Mr. Bush's deputy national security adviser for counterterrorism, said the interception of the explosives was different than the December plot, which stemmed from an intelligence and security breakdown and which challenged the administration's response.
Tait Reimers, a former Navy SEAL who's worked festival security the last two years, said that 2010 was "definitely a tough year from the year before," and he called the security breakdown "a borderline riot situation".
Graham says that it will "be a case study of security breakdown" and "failed presidential leadership" because the consulate was a "death trap" that should have been "closed long before September 11th".
