.gr and .ελ zone is signed (DNSSEC) using cryptographic electronic signatures
The zone files for .gr, .ελ and the secondary level .gr domains are digitally signed by making use of the DNSSEC technology. As the authoritative RRsets of the zone are signed, DNS resolvers can use the public key that singed those records and thus authenticate them, which greatly improves the security and authenticity of the information returned from DNS name servers, eliminating DNS spoofing.
To take advantage of the increased security offered by DNSSEC, domain names must make use of DNSSEC via the registrars. The use of DNSSEC technology is optional.
Registry Lock Service (RLS)
The Registry Lock Service (RLS) provides users with an optional higher level of protection for .gr and .ελ domain names.
Upon the initial activation of the service any changes to the domain name (and any activated reserved forms) or other actions on the domain name (e.g. change of registrant details, deletion of domain name and/or changes/deletion of its subsidiary servers, DS Records update) are prohibited.
Any changes to a domain name when the Registry Lock Service is active are permitted only upon registrant’s request and for a short period of time, defined by the registrant. In order for the request to be verified an 8-digit Authorisation PIN is sent by the Registry to the registrar and the registrant of the domain name, respectively. Both Authorisation PINs must be communicated to the Registry by the registrar for the request to be authorised.