SJCL predates libsodium.js :)
From the SJCL documentation:
> An older version of this implementation is available in the public domain, but this one is (c) Emily Stark, Mike Hamburg, Dan Boneh, Stanford University 2008-2010 and BSD-licensed for liability reasons.
From the SJCL documentation:
> An older version of this implementation is available in the public domain, but this one is (c) Emily Stark, Mike Hamburg, Dan Boneh, Stanford University 2008-2010 and BSD-licensed for liability reasons.