The phrase "act as security" is correct and usable in written English.
It can be used in contexts where something is serving as a form of protection or assurance, often in legal, financial, or safety-related discussions.
Example: "The collateral will act as security for the loan, ensuring that the lender is protected in case of default."
Alternatives: "serve as collateral" or "function as a guarantee".
In many neighbourhoods, singing could be heard through the night and groups of men coordinated to act as security as groups of women attempted to take care of food and hygiene necessities.
The final unifying moment came when private security firm G4S made a hash of its contract to act as security for the Games.
In neighbouring India, a politician has suggested that a regiment of hijras should be established to act as security guards because of their "loyalty and integrity".
Last year, a surprise film hit in Serbia was a dark comedy called "The Parade," in a which a gay veterinarian and his homophobic friend, an ex-paramilitary man, travel across the former Yugoslavia in a pink Mini and recruit war veterans to act as security guards for a gay pride parade in Belgrade.
The Rolling Stones' most notorious gig, was also in California – Altamont, where a decision to allow the Hell's Angels to act as security guards led to a fan, 18-year-old Meredith Hunter, being stabbed to death by an Angel in front of the stage while the Stones played.
This would allow time for the land value to increase and could act as security over the club's debt, which currently stands around £30m.
All hedge fund managers are subject to the extremely broad antifraud provisions of the Investment Advisers Act as well as securities laws prohibiting trading on inside information.
Kofi, who's in his 70s and has lived in Busua for over 50 years, acts as security outside Black Star and Coconut Dreams, where he sits in dazzling Hawaiian shirts and shakes his stick at the kids if they get too close.
He also acts as security (he sleeps in the next tent), and his wife is the cook.
"But it took the CIA almost no time to conclude that the house was probably a hideout for a [high value target]." To avoid detection, bin Laden and his family never left the compound, instead relying on two Pakistani brothers who acted as security guards, bought food and paid bills.
It will act as your security department, sifting through the information that gets fed from the security appliance.
