10. A non-transitory computer readable medium comprising instructions, that when executed by a hardware processor, performs a method of digitally securing a digital object from a first user in a first domain to a second user in a second domain using a domain name system (“DNS”) provider, the method comprising: accessing a client-side local policy, wherein the local policy comprises one or more zones managed by one or more DNS providers and secured by DNS-based authentication of named entities (“DANE”) using DNS security extensions (“DNSSEC”); constructing a DNS query for a cryptographic credential for the second user based, at least in part, on a zone of the one or more zones in the local policy; providing a request for the cryptographic credential for the second user; obtaining the cryptographic credential for the second user from a DNS provider of the one or more DNS providers; digitally securing the digital object using the cryptographic credential; and providing the digital object that is secured using the cryptographic credential to the second user.
10. A non-transitory computer readable medium comprising instructions, that when executed by a hardware processor, performs a method of digitally securing a digital object from a first user in a first domain to a second user in a second domain using a domain name system (“DNS”) provider, the method comprising: accessing a client-side local policy, wherein the local policy comprises one or more zones managed by one or more DNS providers and secured by DNS-based authentication of named entities (“DANE”) using DNS security extensions (“DNSSEC”); constructing a DNS query for a cryptographic credential for the second user based, at least in part, on a zone of the one or more zones in the local policy; providing a request for the cryptographic credential for the second user; obtaining the cryptographic credential for the second user from a DNS provider of the one or more DNS providers; digitally securing the digital object using the cryptographic credential; and providing the digital object that is secured using the cryptographic credential to the second user. 15. The non-transitory computer readable medium of claim 10 , wherein the digital object comprises a document, an email, or a file.