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What is Trusted Authority

Encyclopedia of Information Science and Technology, Fourth Edition
The Trusted Authority is a third party trusted to distribute keys. In the Identity Based Encryption Schemes, the Trusted Authority provide secret keys.
Published in Chapter:
Security of Identity-Based Encryption Algorithms
Kannan Balasubramanian (Mepco Schlenk Engineering College, India) and M. Rajakani (Mepco Schlenk Engineering College, India)
Copyright: © 2018 |Pages: 10
DOI: 10.4018/978-1-5225-2255-3.ch431
The concept of Identity Based Cryptography introduced the idea of using arbitrary strings such as e-mail addresses and IP Addresses to form public keys with the corresponding private keys being created by the Trusted Authority(TA) who is in possession of a system-wide master secret. Then a party, Alice who wants to send encrypted communication to Bob need only Bob's identifier and the system-wide public parameters. Thus the receiver is able to choose and manipulate the public key of the intended recipient which has a number of advantages. While IBC removes the problem of trust in the public key, it introduces trust in the TA. As the TA uses the system-wide master secret to compute private keys for users in the system, it can effectively recompute a private key for any arbitrary string without having to archive private keys. This greatly simplifies key management as the TA simply needs to protect its master secret.
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More Results
A Dynamic Reputation-Based Incentive Scheme to Encourage Selfish Nodes in Post-Disaster Situation Using Delay-Tolerant Network
The authorized node, which is responsible to monitor other nodes’ behavior or cooperation pattern, is termed as Trusted Authority node.
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Identification Protocols
Validates an identity of a user that aims to send messages, or generates a new identity and certifies a user has a denoted identity.
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