Equifax Inc.’s lack of transparency about its massive databreach makes it difficult for the credit-rating firm’s competitorsto check the security of their own information, according toExperian Plc.

“We don’t have a conclusive statement from Equifax,” AlexLintner, Experian’s president of consumer information services,said Tuesday in an interview. “We’re trying to get one about whathappened, so we can double-, triple-, quadruple-check whateverequivalent we have.”

Atlanta-based Equifax last week reported a cyberattack that mayhave affected 143 million people -- or about half the U.S.population -- revealing Social Security numbers, driver’s licensedata and birth dates. Experian, which collects similar customerinformation, said it has confidence in its underlying security andtechnologies.