c. 266, § 120F
Unauthorized access to computer system; penalties
Official text prohibited actmental stateif conditionpenaltylegal term
Whoever, without authorization, knowingly accesses a computer system by any means, or after gaining access to a computer system by any means knows that such access is not authorized and fails to terminate such access, shall be punished by imprisonment in the house of correction for not more than thirty days or by a fine of not more than one thousand dollars, or both.
The requirement of a password or other authentication to gain access shall constitute notice that access is limited to authorized users.
Simplified explanation
Knowingly accessing a computer system without authorization, or staying in after learning access is unauthorized, is punishable by up to 30 days in a house of correction or a fine of up to $1,000.