The phrase "a string of security" is correct and usable in written English.
It can be used to describe a series or collection of security measures, protocols, or features that are implemented to ensure safety or protection.
Example: "The new software update includes a string of security enhancements designed to protect user data from breaches."
Alternatives: "a series of security measures" or "a chain of security protocols".
The shooting, in a high-traffic area near the National Mall crowded with tourists and other bystanders, was the latest in a string of security episodes involving the White House.
So far, talks between the two countries have produced a string of security measures – extra fencing, CCTV cameras, infrared detectors and floodlights – but a notable lack of humanitarian relief.
Adding to the problems, leading newspapers reported a string of security lapses, including the failure by the authorities to detect explosives brought into a competition site during a security drill.
The pattern of offences involving firearms looks more and more like that in America: random, careless shootings have replaced the carefully-planned bank robberies of old".Standards are down," asserts Terry Smith, who carried out a string of security van robberies in 1980s London.
It is a particularly bitter blow for those who have ridden out several tough years in the tourist industry, because it comes at a time when there seemed to be cause for a sliver of cautious optimism, with Russia talking about restarting flights after a string of security upgrades in the airport at Sharm el-Sheikh, from where Metrojet Flight 9268 took off.
The acknowledgment came as Energy Secretary Bill Richardson and his department faced harsh criticism in Congress over the loss of the hard drives, the latest in a string of security lapses at the New Mexico laboratory, where nuclear weapons are designed.
Gruntal is the latest in a string of securities firms to cut jobs amid a slowdown in the investment banking business.
The federal approval makes American Express the latest in a string of securities firms, insurance companies and other financial service businesses to get new federal savings and loan charters in recent months.
LONDON — In the latest of a string of government security breaches involving citizens' personal information, a private consulting company working for Britain's Home Office has lost a memory stick containing details on all of the 84,000 prisoners serving time in England and Wales.
The UK faces a string of "considerable" security threats, including the emergence of militant group Isis and the "expanding scope" of cyber crime, the home secretary has said.
After a string of Facebook security breaches and outcry from US Senators over Facebook's new privacy policies, the New York Times revealed the complexities of Facebook's new privacy policy (now longer than the Constitution).
