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3. Grid Authentication. - Mode of access: https://safenet.gemalto.com/multi-factor-authentication/authenticators/grid-authentication , free. Accessed 08 Dec 2016 (in Russian)
4. Open ID foundation. - Mode of access: http://openid.net , free. Accessed 08 Dec 2016 (in Russian)
5. OAuth 2.0. - Mode of access: https://oauth.net/2 , free. Accessed 08 Dec 2016 (in Russian)