Does anyone know if it would be completely save to have a site (blog) with the public part on http:// http:// on one domain (f.e. aa.com), and the administratio

Does anyone know if it would be completely save to have a site (blog) with the public part on http:// http:// on one domain (f.e. aa.com), and the administration part on https:// https:// on another domain (f.e. bb.com)?