Maryland’s Board of Elections fell one vote short last year of the super-majority needed to inch the state toward online on-line voting, despite cyber experts’ warnings that such balloting could easily be hacked, with votes even switched to other candidates. Now, three months before this fall’s elections, the issue has morphed into a legal battle pitting the blind vs. the blind. It’s a fight with plenty of intrigue behind it and nationwide implications in the debate over whether cyber security is ready for electronic voting. The National Federation of the Blind Inc., which touts itself as the recognized voice of blind Americans and their families, filed a federal court suit in May seeking to compel the state elections board to make its newly developed online ballot-marking system available so that all disabled people could cast absentee ballots via the internet this fall. It’s a suit that likely wasn’t unwelcome to the three board members who voted to implement the system and to state Election Director Linda Lamone, a big advocate of electronic voting. But over the weekend, the American Council of the Blind of Maryland, along with three blind residents and two nonprofit groups that have fought internet voting, intervened in the case filed in Baltimore. They contend that the board’s online balloting tool is both flawed and insecure.