Section: OpenSSL (3)
BN_security_bits - returns bits of security based on given numbers
int BN_security_bits(int L, int N);
returns the number of bits of security provided by a
specific algorithm and a particular key size. The bits of security is
defined in NIST SP800-57.
support two types
of asymmetric algorithms: the FFC
(Finite Field Cryptography) and IFC
(Integer Factorization Cryptography). For FFC,
are used to decide the bits of security, where
is the size of the public key and N
is the size of the private
key. For IFC,
is used and it's commonly considered
to be the key size (modulus).
Number of security bits.
(Elliptic Curve Cryptography) is not covered by the BN_security_bits()
function. The symmetric algorithms are not covered neither.
function was added in OpenSSL 1.1.0.
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Licensed under the OpenSSL license (the ``License''). You may not use
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in the file LICENSE in the source distribution or at