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Identity-based systems have a characteristic problem in operation. Suppose Alice and Bob are users of such a system. Since the information needed to find Alice's public key is completely determined by Alice's ID and the master public key, it is not possible to revoke Alice's credentials and issue new credentials without either (a) changing Alice's ID (usually a phone number or an email address ...
Identity-based encryption (IBE), is an important primitive of identity-based cryptography. As such it is a type of public-key encryption in which the public key of a user is some unique information about the identity of the user (e.g. a user's email address). This means that a sender who has access to the public parameters of the system can ...
The earliest forms of Identity-based security was introduced in the 1960s by computer scientist Fernando Corbató. [4] During this time, Corbató invented computer passwords to prevent users from going through other people's files, a problem evident in his Compatible Time-Sharing System (C.T.S.S.), which allowed multiple users access to a computer concurrently. [5]
Modern cryptography is heavily based on mathematical theory and computer science practice; cryptographic algorithms are designed around computational hardness assumptions, making such algorithms hard to break in actual practice by any adversary. While it is theoretically possible to break into a well-designed system, it is infeasible in actual ...
Identity Based Cryptography is a type of public key cryptography that uses a widely known representation of an entity's identity (name, email address, phone number etc.) as the entity's public key. This eliminates the need to have a separate public key bound by some mechanism (such as a digitally signed public key certificate) to the identity ...
A key-exchange algorithm based on the scheme is the MIKEY-SAKKE protocol developed by the UK's national intelligence and security agency, GCHQ, and defined in RFC 6509. Sakai-Kasahara, as specified in MIKEY-SAKKE, is the core key-exchange algorithm of the Secure Chorus encrypted Voice over IP standard.
For key authentication using the traditional symmetric key cryptography, this is the problem of assuring that there is no man-in-the-middle attacker who is trying to read or spoof the communication. There are various algorithms used now-a-days to prevent such attacks.
In an identity-based conditional proxy re-encryption (IBCPRE) system, users set their public keys as unique identities of the users. One of the main advantages of using identity-based cryptographic algorithms is the elimination of public key certificates, which can help enhance the usability of the target security applications. The term ...