(a)
Offense.—
Except as provided in subsection (c) of this section whoever—
(1)
intentionally accesses without authorization a facility through which an electronic communication service is provided; or
(2)
intentionally exceeds an authorization to access that facility;
and thereby obtains, alters, or prevents authorized access to a wire or electronic communication while it is in electronic storage in such system shall be punished as provided in subsection (b) of this section.