The Act for prevention of Cyber Crimes in India is the Information Technology Act, 2000.Favourite Choice
Section 66 A of Information Technology Act, 2000 provides punishment for online Defamation.
Section 66A can be read as follows:-
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6A. Punishment for sending offensive messages through communication service, etc..-
Any person who sends, by means of a computer resource or a communicable device,-
(a) any information that is grossly offensive or has menacing character; or
(b) any information which he knows to be false, but for the purpose of causing annoyance, inconvenience, danger, obstruction, insult, injury, criminal intimidation, enmity, hatred, or ill will, persistently makes by making use of such computer resource or a communication device;
(c) any Electronic Mail or Electronic Mail Message for the purpose of causing annoyance or inconvenience or to deceive or to mislead the addressee or recipient about the origin of such messages, shall be punishable with imprisonment for a term which may extend to three years and with fine.
Explanation: For the purposes of this section, terms "Electronic mail" and "Electronic Mail Message" means a message or information created or transmitted or received on a computer, computer system, computer resource or communication device including attachments in text, image, audio, video and any other Electronic record, which may be transmitted with the message.
Section 65A and Section 65B of The Indian Evidence Act, 1872 provides for Admissibility of electronic records as evidence. Some of the sections of Indian Penal Code, 1960 that deal with Cyber defamation are Section 499, 500 and 503.