[#BN_security_bits]
= BN_security_bits
:mrdocs:

Estimate the security strength in bits for asymmetric parameters of sizes `L` and `N.`

== Synopsis

Declared in `<openssl/bn.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
BN_security_bits(
    int L,
    int N);
----

== Return Value

Estimated security strength in bits (NIST SP 800‐57 style).

== Parameters

[cols="1,4"]
|===
| Name| Description
| *L*
| Public‐key / modulus size in bits (for example RSA modulus length).
| *N*
| Private‐value size in bits (for example subgroup order); may be 0 when unused.
|===


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