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<a href="http://www.citi.umich.edu/u/provos/ssh/privsep.html">Niels Provos</a>

and Markus Friedl in OpenSSH in March 2002, released with OpenBSD 3.2.

The concept is now used in many programs.

<li>W^X: First used for sparc, sparc64, alpha, and hppa in OpenBSD 3.3.

Today, most architectures implement it.</li>

<li>ASLR: OpenBSD 3.4 was the first widely used operating system to

provide it by default.</li>

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man1/gcc-local.1">gcc-local(1)</a>

__attribute__((__bounded__)) static analysis annotation

and checking mechanism:

Line 112

Line 116

First released with OpenBSD 3.4.

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/malloc.3">malloc(3)</a> randomization:

Implemented by <a href="http://www.openbsd.org/papers/eurobsdcon2009/otto-malloc.pdf">Otto Moerbeek</a> for OpenBSD 4.4.</li>

<li>W^X: First used for sparc, sparc64, alpha, and hppa in OpenBSD 3.3.

Today, most architectures implement it.</li>

<li>ASLR: OpenBSD 3.4 was the first widely used operating system to

provide it by default.</li>

</ul>

<h3>Early adoption in OpenBSD</h3>

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Imported February 13, 1997 and first released with OpenBSD 2.1.

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/strlcpy.3">strlcpy(3)</a>, <a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/strlcat.3">strlcat(3)</a>: Todd Miller and Theo de Raadt, July 1, 1998, OpenBSD 2.4</li>

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/strtonum.3">strtonum(3)</a>: Ted Unangst, Todd Miller, and Theo de Raadt, May 3, 2004, OpenBSD 3.6</li>

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/timingsafe_bcmp.3">timingsafe_bcmp(3)</a>: Damien Miller, July 13, 2010, OpenBSD 4.9</li>

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/explicit_bzero.3">explicit_bzero(3)</a>: Ted Unangst and Matthew Dempsky, January 22, 2014, OpenBSD 5.5</li>

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/reallocarray.3">reallocarray(3)</a>: Theo de Raadt and Ted Unangst, April 22, 2014, OpenBSD 5.6</li>

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man2/getentropy.2">getentropy(2)</a>: Matthew Dempsky and Theo de Raadt, June 13, 2014, OpenBSD 5.6</li>

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man2/sendsyslog.2">sendsyslog(2)</a>: Theo de Raadt, July 10, 2014, OpenBSD 5.6</li>

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/timingsafe_memcmp.3">timingsafe_memcmp(3)</a>: Matthew Dempsky, July 13, 2014, OpenBSD 5.6</li>

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man2/pledge.2">pledge(2)</a>: Theo de Raadt, July 19, 2015, OpenBSD 5.9</li>

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/imsg_init.3">imsg</a>:

message passing API, written by Henning Brauer.

Message passing API, written by Henning Brauer.

In libutil since May 26, 2010, OpenBSD 4.8;

used by various daemons before that.</li>

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/asr_run.3">asr</a>:

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/timingsafe_bcmp.3">timingsafe_bcmp(3)</a>: Damien Miller, July 13, 2010, OpenBSD 4.9</li>

Replacement resolver written and maintained by Eric Faurot.

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/explicit_bzero.3">explicit_bzero(3)</a>: Ted Unangst and Matthew Dempsky, January 22, 2014, OpenBSD 5.5</li>

Imported April 14, 2012; activated on March 26, 2014, OpenBSD 5.6.</li>

<li><a href="http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/ohash_init.3">ohash</a>:

Written and maintained by Marc Espie.

In libutil since May 12, 2014, OpenBSD 5.6;

used by make(1) and m4(1) before that.</li>