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1 Controller of Certifying Authorities (CCA)
Centre in New Delhi, to license & regulate working of Certifying Authorities (CA) that issue digital signature certificates for e-transactions; maintains Root Certifying Authority of India (RCAI) & National Repository of Digital Certificates (NRDC)
2 iCERT
Licensed certifying authority of the CBEC under the Department of Revenue, Ministry of Finance in Delhi; issues digital signature certificates as per the Information Technology Act 2000 to CBEC's trading community, its officers & related agencies
Public Key Infrastructure (PKI) established by Mahanagar Telephone Nigam Limited; provides digital certificates to entities including individuals, organizations, servers and network devices within the framework of IT-Act 2000