• K Satyanarayana
• Prof.S.ramachandram

Identity-based cryptography (IBC) has gained popularity in recent years due to its lack of need for public-key certificate maintenance overhead. However, an unresolved but important problem regarding IBC is how to revoke a misbehaving user. Identity-based encryption (IBE) systems with revocable keys have recently been suggested, but little work has been done on the revocation issue of identity-based signatures so far. Revocation in identity-based settings may be accomplished by having the key generation centre refresh users' private keys regularly (KGC). Nevertheless, as the number of users grows, the strain on the KGC will grow much faster. We provide an efficient RIBS method that outsources the revocation operation to a cloud revocation server in this paper (CRS). Most of the calculations required during important updates are offloaded to the CRS in our suggested method. It is shown that the proposed method is existentially unforgeable in the random oracle model against adaptively selected messages and identity attacks, and we explain the new framework and security model for it. This system has reduced calculation and transmission costs than earlier IBS schemes, as well. To ensure that certificates are valid and up-to-date, certificate authorities (CAs) are in charge of all of these activities.

"IDENTITY-BASED SIGNATURES IN CLOUD COMPUTING", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 12, page no.a614-a623, December-2021, Available :http://www.jetir.org/papers/JETIR2112074.pdf

"IDENTITY-BASED SIGNATURES IN CLOUD COMPUTING", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 12, page no. ppa614-a623, December-2021, Available at : http://www.jetir.org/papers/JETIR2112074.pdf