df75c2bfcd
While stereotyped repetitions are frowned upon in literature, they serve a useful purpose in manual pages, because it is easier for the user to find certain information if it is always presented in the same way. For that reason, this commit harmonizes the varying formulations in the HISTORY section about which functions, flags, etc. were added in which OpenSSL version. It also attempts to make the pod files more grep friendly by avoiding to insert line breaks between the symbol names and the corresponding version number in which they were introduced (wherever possible). Some punctuation and typographical errors were fixed on the way. Reviewed-by: Tim Hudson <tjh@openssl.org> (Merged from https://github.com/openssl/openssl/pull/7854)
51 lines
1.5 KiB
Text
51 lines
1.5 KiB
Text
=pod
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=head1 NAME
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BN_security_bits - returns bits of security based on given numbers
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=head1 SYNOPSIS
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#include <openssl/bn.h>
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int BN_security_bits(int L, int N);
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=head1 DESCRIPTION
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BN_security_bits() returns the number of bits of security provided by a
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specific algorithm and a particular key size. The bits of security is
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defined in NIST SP800-57. Currently, BN_security_bits() support two types
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of asymmetric algorithms: the FFC (Finite Field Cryptography) and IFC
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(Integer Factorization Cryptography). For FFC, e.g., DSA and DH, both
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parameters B<L> and B<N> are used to decide the bits of security, where
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B<L> is the size of the public key and B<N> is the size of the private
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key. For IFC, e.g., RSA, only B<L> is used and it's commonly considered
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to be the key size (modulus).
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=head1 RETURN VALUES
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Number of security bits.
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=head1 NOTES
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ECC (Elliptic Curve Cryptography) is not covered by the BN_security_bits()
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function. The symmetric algorithms are not covered neither.
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=head1 HISTORY
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The BN_security_bits() function was added in OpenSSL 1.1.0.
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=head1 SEE ALSO
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L<DH_security_bits(3)>, L<DSA_security_bits(3)>, L<RSA_security_bits(3)>
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=head1 COPYRIGHT
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Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the OpenSSL license (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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