V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

CDA
       Combined dynamic Data Authentication (EMV, cryptography)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

CDA
       Communications Decency Act (Internet, USA)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

CDA
       Compound Document Architecture (DEC)


The Jargon File (version 4.4.7, 29 Dec 2003):

CDA
 /C?D?A/

    The ?Communications Decency Act?, passed as section 502 of a major
    telecommunications reform bill on February 8th, 1996 (?Black Thursday?).
    The CDA made it a federal crime in the USA to send a communication which is
    ?obscene, lewd, lascivious, filthy, or indecent, with intent to annoy,
    abuse, threaten, or harass another person.? It also threatened with
    imprisonment anyone who ?knowingly? makes accessible to minors any message
    that ?describes, in terms patently offensive as measured by contemporary
    community standards, sexual or excretory activities or organs?.

    While the CDA was sold as a measure to protect minors from the putative
    evils of pornography, the repressive political aims of the bill were laid
    bare by the Hyde amendment, which intended to outlaw discussion of abortion
    on the Internet.

    To say that this direct attack on First Amendment free-speech rights was
    not well received on the Internet would be putting it mildly. A firestorm
    of protest followed, including a February 29th 1996 mass demonstration by
    thousands of netters who turned their home pages black for 48 hours.
    Several civil-rights groups and computing/telecommunications companies
    mounted a constitutional challenge. The CDA was demolished by a
    strongly-worded decision handed down in 8th-circuit Federal court and
    subsequently affirmed by the U.S. Supreme Court on 26 June 1997 (?White
    Thursday?). See also Exon.


The Free On-line Dictionary of Computing (30 December 2018):

CDA

   1.  Compound Document Architecture.

   2.  Communications Decency Act.