EXHIBIT 5.1

                             GREENBERG TRAURIG, LLP
                                MetLife Building
                           200 Park Avenue, 14th Floor
                               New York, NY 10166

                                                               February 27, 2006

Electronic Control Security Inc.
790 Bloomfield Avenue, Building C, Suite 1
Clifton, New Jersey 07012

Dear Sirs:

            We are acting as counsel to Electronic Control Security Inc., a New
Jersey corporation (the "Company"), in connection with the Registration
Statement on Form SB-2 filed on February 27, 2006 (the "Registration
Statement"), under the Securities Act of 1933, as amended (the "Act"), covering
3,374,909 shares of the Company's common stock, par value $.001 per share (the
"Common Stock"), which are being registered in connection with the proposed sale
of the shares of Common Stock by the selling stockholder listed therein.

            We have examined the originals, or certified, conformed or
reproduction copies, of all such records, agreements, instruments and documents
as we have deemed relevant or necessary as the basis for the opinion hereinafter
expressed. In all such examinations, we have assumed the genuineness of all
signatures on originals or certified copies and the conformity to original or
certified copies of all copies submitted to us as conformed or reproduction
copies. As to various questions of fact relevant to such opinion, we have relied
upon, and assumed the accuracy of, certificates and oral or written statements
and other information of or from public officials, officers or representatives
of the Company, and others.

            Based upon the foregoing, we are of the opinion that the 411,862
shares of Common Stock included in the Registration Statement that are presently
outstanding are legally issued, fully-paid and non-assessable, and the 3,680,993
shares of Common Stock included in the Registration Statement that are issuable
pursuant to the conversion into Common Stock of outstanding senior secured
convertible debentures and shares of the Company's series A and series B
convertible preferred stock, payment of interest and dividends thereon, and
exercise of warrants to purchase Common Stock will, when issued, delivered and
paid for in accordance with the terms and conditions of the instruments
governing their issuance, be legally issued, fully paid and non-assessable.

            We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the reference to this firm under the caption
"Legal Matters" in the prospectus forming a part of the Registration Statement.

                                        Very truly yours,

                                        /s/ Greenberg Traurig, LLP

                                        GREENBERG TRAURIG, LLP