Timed-Release Encryption with Pre-open Capability and Its Application to Certified E-mail System

Hwang, Yong Ho; Yum, Dae Hyun; Lee, Pil Joong

doi:10.1007/11556992_25

Cited by 39 publications

(29 citation statements)

References 12 publications

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“…The scheme we propose shares similarities with the scheme proposed by Hwang, Yum and Lee [14]; however, our scheme is substantially simpler and, when used with a suitable DEM, gives rise to a more efficient TRE-PC scheme.…”

Section: An Efficient Tre-pc Kemmentioning

confidence: 89%

“…In the paper that proposes the concept of timed-release encryption with pre-open capability, Hwang, Yum, and Lee [14] propose a security model against which the security of a TRE-PC scheme could be assessed. We refer to this model as the HYL model.…”

Section: The Hyl Security Modelmentioning

confidence: 99%

“…However, in some circumstances, we may need a special kind of TRE schemes, in which a mechanism enables the receiver to decrypt the ciphertext before the release time without requiring the sender to re-send the plaintext. Recently, Hwang, Yum, and Lee [14] proposed such a scheme, which they term a Timed-Release Encryption Scheme with Pre-Open Capability (TRE-PC). In a TRE-PC scheme, a message is encrypted in such a way that it can only be decrypted at a certain point in time, or if the sender releases a piece of trapdoor information called a pre-open key.…”

Section: Introductionmentioning

confidence: 99%

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Revisiting the Security Model for Timed-Release Encryption with Pre-open Capability

Dent

Tang

2007

Lecture Notes in Computer Science

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Abstract. The concept of timed-released encryption with pre-open capability (TRE-PC) was introduced by Hwang, Yum and Lee. In a TRE-PC scheme, a message is encrypted in such a way that it can only be decrypted at a certain point in time or if the sender releases a piece of trapdoor information known as a pre-open key. This paper examines the security model for a TRE-PC scheme, demonstrates that a TRE-PC scheme can be constructed using a KEM-DEM approach, and provides an efficient example of a TRE-PC scheme.

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Section: An Efficient Tre-pc Kemmentioning

confidence: 89%

Section: The Hyl Security Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Revisiting the Security Model for Timed-Release Encryption with Pre-open Capability

Dent

Tang

2007

Lecture Notes in Computer Science

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“…The recovery of past time-dependent trapdoors from a current trapdoor was studied in [9] and [27], which employs a hash chain and a tree structure [6] respectively. The study of the pre-open capability in TRE was initiated in [24] and improved by [19]. Recently, Chalkias, Hristu-Varsakelis and Stephanides proposed an efficient TRE scheme [8] with random oracles.…”

Section: Timed-release Encryptionmentioning

confidence: 99%

“…Typically in TRE [3,8,12,19,24], a single public key is given to the adversary as the target of attack. However, the non-standard TRE formulation in [7] does allow uncertified public keys.…”

Section: Certificateless Encryption From Timed-release Encryptionmentioning

confidence: 99%

General Certificateless Encryption and Timed-Release Encryption

Chow

Röth

Rieffel

2008

Lecture Notes in Computer Science

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Abstract. While recent timed-release encryption (TRE) schemes are implicitly supported by a certificateless encryption (CLE) mechanism, the security models of CLE and TRE differ and there is no generic transformation from a CLE to a TRE. This paper gives a generalized model for CLE that fulfills the requirements of TRE. This model is secure against adversaries with adaptive trapdoor extraction capabilities, decryption capabilities for arbitrary public keys, and partial decryption capabilities. It also supports hierarchical identifiers. We propose a concrete scheme under our generalized model and prove it secure without random oracles, yielding the first strongly-secure security-mediated CLE and the first TRE in the standard model. In addition, our technique of partial decryption is different from the previous approach.

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An improved attribute‐based encryption technique towards the data security in cloud computing

Namasudra

2017

Concurrency and Computation

111

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Summary With the rapid development of the Internet, resource and knowledge sharing are two major problems experienced due to the presence of many hackers and malicious users. In this paper, an efficient and secure access control model has been proposed for the cloud computing environment for resource and knowledge sharing by using attribute‐based encryption (ABE), distributed hash table (DHT) network, and identity‐based timed‐release encryption (IDTRE). Here, at first, data or resources are encrypted by using the attributes of users, and encrypted data are divided into the encapsulated ciphertext and extracted ciphertext. Then, IDTRE algorithm has been used to encrypt the decryption key and combined the ciphertext of the key with the extracted ciphertext for creating the ciphertext shares. At last, the ciphertext shares are distributed into the DHT network, and encapsulated ciphertext are stored on the cloud servers. Both the performance and security analysis show the proficiency of the proposed scheme over the existing schemes in a cloud environment.

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Timed-Release Encryption with Pre-open Capability and Its Application to Certified E-mail System

Cited by 39 publications

References 12 publications

Revisiting the Security Model for Timed-Release Encryption with Pre-open Capability

Revisiting the Security Model for Timed-Release Encryption with Pre-open Capability

General Certificateless Encryption and Timed-Release Encryption

An improved attribute‐based encryption technique towards the data security in cloud computing

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