Officials from RSA Security are advising customers of the company’s BSAFE toolkit and Data Protection Manager to stop using a crucial cryptography component in the products that were recently revealed to contain a backdoor engineered by the National Security Agency (NSA).

An advisory sent to select RSA customers on Thursday confirms that both products by default use something known as Dual EC_DRBG when creating cryptographic keys.

The specification, which was approved in 2006 by the National Institute of Standards and Technology (NIST) and later by the International Organization for Standardization, contains a backdoor that was inserted by the NSA, The New York Times reported last week. RSA’s advisory came 24 hours after Ars asked the company if it intended to warn BSAFE customers about the deliberately crippled pseudo random number generator (PRNG), which is so weak that it undermines the security of most or all cryptography systems that use it. “To ensure a high level of assurance in their application, RSA strongly recommends that customers discontinue use of Dual EC DRBG and move to a different PRNG,” the RSA advisory stated. “Technical guidance, including how to change the default PRNG in most libraries, is available in the most current product documentation” on RSA’s websites. 1     

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