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Role-based identities are central to understanding how individuals navigate social environments by adopting distinct self-conceptions aligned with various societal roles. These identities are not fixed traits but are constructed through personal actions and the social feedback individuals receive in context-specific interactions. Each social role, such as student, teacher, or friend, carries a set of expectations and norms that influence how people think, feel, and behave within that...
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Related Experiment Video

Updated: Apr 23, 2026

In Vitro Directed Evolution of a Restriction Endonuclease with More Stringent Specificity
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In Vitro Directed Evolution of a Restriction Endonuclease with More Stringent Specificity

Published on: March 25, 2020

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An efficient and provable secure revocable identity-based encryption scheme.

Changji Wang1, Yuan Li1, Xiaonan Xia1

  • 1School of Information Science and Technology, Sun Yat-sen University, Guangzhou, China; Guangdong Province Information Security Key Laboratory, Sun Yat-sen University, Guangzhou, China.

Plos One
|September 20, 2014
PubMed
Summary
This summary is machine-generated.

We developed a new revocable identity-based encryption (RIBE) scheme that is scalable and resilient to key exposure. This efficient RIBE scheme offers constant-size public parameters, enhancing security and performance.

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Last Updated: Apr 23, 2026

In Vitro Directed Evolution of a Restriction Endonuclease with More Stringent Specificity
09:16

In Vitro Directed Evolution of a Restriction Endonuclease with More Stringent Specificity

Published on: March 25, 2020

7.7K

Area of Science:

  • Cryptography
  • Information Security
  • Computer Science

Background:

  • Revocation functionality is essential for identity-based cryptosystems.
  • Existing revocable identity-based encryption (RIBE) schemes often suffer from insecurity or inefficiency.
  • Scalable and secure RIBE schemes are critical for modern identity management.

Purpose of the Study:

  • To propose a novel, scalable RIBE scheme with enhanced security features.
  • To improve the efficiency of RIBE schemes concerning ciphertext and public parameter size.
  • To achieve decryption key exposure resilience in an identity-based encryption context.

Main Methods:

  • Combining the Lewko and Waters' identity-based encryption scheme with the complete subtree method.
  • Utilizing dual system encryption methodology to prove semantic security.
  • Analyzing efficiency metrics including ciphertext size, public parameters size, and decryption cost.

Main Results:

  • A new scalable and semantically secure RIBE scheme is constructed.
  • The proposed scheme demonstrates improved efficiency in ciphertext size, public parameters size, and decryption cost compared to existing methods.
  • Achieved decryption key exposure resilience.

Conclusions:

  • The developed RIBE scheme is the first known construction offering scalability, semantic security, and constant-size public system parameters.
  • This work advances the field of identity-based encryption by providing a more efficient and secure solution for revocation.
  • The proposed scheme offers a practical improvement for secure identity management systems.