<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Apr 23, 2016 at 1:18 AM, Jason A. Donenfeld <span dir="ltr"><<a href="mailto:Jason@zx2c4.com" target="_blank">Jason@zx2c4.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
What precisely prevents you from using these?<br></blockquote><div><br>Embedded systems. The state and stack sizes of BLAKE2b and SHA512 may put too much pressure on the RAM size of low-end devices in software implementations.<br><br></div><div>Some embedded chips have hardware support for SHA256 and HMAC-SHA256 now which reduces memory pressure, but SHA512 hardware support is non-existent in this space.<br></div><div><br>I'd prefer to keep BLAKE2s and SHA256 as an option.<br></div></div><br></div><div class="gmail_extra">Cheers,<br><br></div><div class="gmail_extra">Rhys.<br><br></div></div>