# File lib/Dnsruby/dnssec.rb, line 142
    def self.no_keys?
      no_keys = true
      [@@anchor_verifier, @@root_verifier, @@dlv_verifier].each {|v|
        if (v.trusted_keys.length() > 0 ||
              v.trust_anchors.length() > 0)
          no_keys = false
        end
      }
      return no_keys
    end