scholarly journals Strongly Secure Certificateless Signature Scheme Supporting Batch Verification

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Chun-I Fan ◽  
Pei-Hsiu Ho ◽  
Yi-Feng Tseng
Keyword(s):  
Digital Signature ◽  
Signature Scheme ◽  
Batch Verification ◽  
Level 3 ◽  
Hard Problems ◽  
Identity Based ◽  
Level 1 ◽  
Certificateless Signature ◽  
Digital Signature Scheme ◽  
Level 2

We propose a strongly secure certificateless signature scheme supporting batch verification, which makes it possible for a verifier to verify a set of signatures more efficiently than verifying them one by one. In an identity-based digital signature scheme, private key generator (PKG) knows each user's signing key, so it can generate a signature which is indistinguishable from the signature generated by the user. This is a serious problem because the property of signature nonrepudiation will not be achieved. In our proposed scheme, it is impossible for PKG to produce a signature which is indistinguishable from any signature produced by a user. Compared with existing signature schemes with batch verification, although our proposed scheme is not the most efficient one, it achieves Girault's level-3 security, while the others have Girault's level-1 or level-2 security only. We also formally prove that the proposed scheme is unforgeable and satisfies Girault's level-3 security based on hard problems.

Key Substitution Attack and Malleability of a Short Signature Scheme with Batch Verification

2011 ◽  
Vol 55-57 ◽  
pp. 1605-1608
Author(s):  
Fan Yu Kong ◽  
Jia Yu
Keyword(s):  
Digital Signature ◽  
Public Key ◽  
Signature Scheme ◽  
Batch Verification ◽  
Malicious Adversary ◽  
Short Signature ◽  
Digital Signature Scheme

At IWSEC 2008, F. Guo et al. proposed an efficient short signature scheme with batch verification based on C. Gentry’s scheme. In this paper, we firstly propose the key substitution attack on F. Guo et al.’s digital signature scheme and show that the malicious adversary can forge a valid signature, which can be verified with a substituted public key. Secondly, we prove that F. Guo et al.’s scheme is malleable and the attacker can produce a new valid signature on the message if he/she has known some valid signatures on the same message.

Application of Identity-Based Blind Signature in the Performance Evaluation

2013 ◽  
Vol 846-847 ◽  
pp. 1652-1655
Author(s):  
Rui Wu ◽  
Shi Ping Yang
Keyword(s):  
Performance Evaluation ◽  
Digital Signature ◽  
Blind Signature ◽  
Signature Scheme ◽  
Evaluation Scheme ◽  
Identity Based ◽  
Blind Digital Signature ◽  
Digital Signature Scheme

This paper describes identity-based digital signature. On this basis, we introduce blind digital signature to propose a new identity-based blind digital signature scheme and analyze the performance between this new scheme and a previous one. Then we discuss the application of identity-based blind digital signature in the performance evaluation and design an online performance evaluation scheme.

Identity-Based Proxy Signcryption Schemes

2013 ◽  
Vol 380-384 ◽  
pp. 2605-2608
Author(s):  
Jian Wu
Keyword(s):  
Digital Signature ◽  
Computational Cost ◽  
Proxy Signature ◽  
Single Step ◽  
Signature Scheme ◽  
Signature Schemes ◽  
Identity Based Encryption ◽  
Encryption Schemes ◽  
Identity Based ◽  
Digital Signature Scheme

Identity-based encryption and signature schemes that allow any pair of users to communicate securely and to verify each other's signatures without verifying certificate. A signcryption is a primitive that provides the properties of both digital signatures and encryption schemes in a way that is more efficient than signing and encrypting separately. Proxy signature schemes are a variation of ordinary digital signature scheme that allow a proxy signer to sign messages on behalf of the original singer which proxy signcryption simultaneously fulfill both the functions of signature and encryption in a single step with a lower computational cost than that required by the traditional signature-then-encryption. In this paper, we present identity-based proxy signcryption schemes with lower efficient..

EVALUASI PELATIHAN DI PT. PUPUK KUJANG CIKAMPEK

2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Lania Muharsih ◽  
Ratih Saraswati
Keyword(s):  
Training Evaluation ◽  
Work Productivity ◽  
Learning Behavior ◽  
Level 3 ◽  
Level 1 ◽  
Four Levels ◽  
A Company ◽  
Level 2 ◽  
Evaluation Sheet ◽  
Assessment Factor

This study aims to determine the training evaluation at PT. Kujang Fertilizer. PT. Pupuk Kujang is a company engaged in the field of petrochemicals. Evaluation sheet of PT. Fertilizer Kujang is made based on Kirkpatrick's theory which consists of four levels of evaluation, namely reaction, learning, behavior, and results. At level 1, namely reaction, in the evaluation sheet is in accordance with the theory of Kirkpatrick, at level 2 that is learning should be held pretest and posttest but only made scale. At level 3, behavior, according to theory, but on assessment factor number 3, quantity and work productivity should not need to be included because they are included in level 4. At level 4, that is the result, here is still lacking to get a picture of the results of the training that has been carried out because only based on answers from superiors without evidence of any documents.   Keywords: Training Evaluation, Kirkpatrick Theory.    Penelitian ini bertujuan mengetahui evaluasi training di PT. Pupuk Kujang. PT. Pupuk Kujang merupakan perusahaan yang bergerak di bidang petrokimia. Lembar evaluasi PT. Pupuk Kujang dibuat berdasarkan teori Kirkpatrick yang terdiri dari empat level evaluasi, yaitu reaksi, learning, behavior, dan hasil. Pada level 1 yaitu reaksi, di lembar evaluasi tersebut sudah sesuai dengan teori dari Kirkpatrick, pada level 2 yaitu learning seharusnya diadakan pretest dan posttest namun hanya dibuatkan skala. Pada level 3 yaitu behavior, sudah sesuai teori namun pada faktor penilaian nomor 3 kuantitas dan produktivitas kerja semestinya tidak perlu dimasukkan karena sudah termasuk ke dalam level 4. Pada level 4 yaitu hasil, disini masih sangat kurang untuk mendapatkan gambaran hasil dari pelatihan yang sudah dilaksanakan karena hanya berdasarkan dari jawaban atasan tanpa bukti dokumen apapun.   Kata kunci: Evaluasi Pelatihan, Teori Kirkpatrick.

Sign in / Sign up

Export Citation Format

Share Document