Mask generation function: Difference between revisions

Revision as of 14:44, 11 December 2017

Revision as of 21:56, 29 August 2018

Line 3:

== Definition ==

<blockquote>

"A mask generation function takes an octet string of variable length

A mask generation function takes an octet string of variable length and a desired output length as input, and outputs an octet string of the desired length. There may be restrictions on the length of the input and output octet strings, but such bounds are generally very large. Mask generation functions are deterministic; the octet string output is completely determined by the input octet string. The output of a mask generation function should be pseudorandom, that is, if the seed to the function is unknown, it should be infeasible to distinguish the output from a truly random string.<ref name="rsa">{{cite web |url=https://www.ietf.org/rfc/rfc2437.txt |title=RFC 2437 PKCS #1 |author=RSA Laboratories}}</ref>

and a desired output length as input, and outputs an octet string of

</blockquote>

the desired length. There may be restrictions on the length of the

input and output octet strings, but such bounds are generally very

large. Mask generation functions are deterministic; the octet string

output is completely determined by the input octet string. The output

of a mask generation function should be pseudorandom, that is, if the

seed to the function is unknown, it should be infeasible to

distinguish the output from a truly random string."<ref name="rsa">{{cite web |url=https://www.ietf.org/rfc/rfc2437.txt |title=RFC 2437 PKCS #1 |author=RSA Laboratories}}</ref>

== Applications ==