Media type: E-Article Title: SIP Issues and Challenges – A Scalable Three Factor Authentication Scheme Contributor: Jan, Saeed Ullah imprint: Elsevier BV, 2020 Published in: SSRN Electronic Journal (2020) Language: English DOI: 10.2139/ssrn.3576552 ISSN: 1556-5068 Keywords: Pharmacology (medical) Origination: Footnote: