全文获取类型
收费全文 | 1704篇 |
免费 | 310篇 |
国内免费 | 252篇 |
专业分类
电工技术 | 26篇 |
综合类 | 224篇 |
机械仪表 | 10篇 |
建筑科学 | 2篇 |
矿业工程 | 3篇 |
轻工业 | 5篇 |
石油天然气 | 1篇 |
武器工业 | 3篇 |
无线电 | 644篇 |
一般工业技术 | 53篇 |
冶金工业 | 3篇 |
自动化技术 | 1292篇 |
出版年
2024年 | 9篇 |
2023年 | 26篇 |
2022年 | 50篇 |
2021年 | 50篇 |
2020年 | 63篇 |
2019年 | 39篇 |
2018年 | 51篇 |
2017年 | 54篇 |
2016年 | 71篇 |
2015年 | 75篇 |
2014年 | 98篇 |
2013年 | 155篇 |
2012年 | 173篇 |
2011年 | 184篇 |
2010年 | 132篇 |
2009年 | 161篇 |
2008年 | 128篇 |
2007年 | 169篇 |
2006年 | 140篇 |
2005年 | 96篇 |
2004年 | 77篇 |
2003年 | 57篇 |
2002年 | 47篇 |
2001年 | 33篇 |
2000年 | 31篇 |
1999年 | 30篇 |
1998年 | 7篇 |
1997年 | 13篇 |
1996年 | 7篇 |
1995年 | 7篇 |
1994年 | 1篇 |
1993年 | 4篇 |
1992年 | 5篇 |
1991年 | 1篇 |
1990年 | 4篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1982年 | 5篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1977年 | 1篇 |
排序方式: 共有2266条查询结果,搜索用时 15 毫秒
1.
2.
Bahram Rashidi 《International Journal of Circuit Theory and Applications》2020,48(8):1227-1243
In this paper, low-cost and two-cycle hardware structures of the PRINCE lightweight block cipher are presented. In the first structure, we proposed an area-constrained structure, and in the second structure, a high-speed implementation of the PRINCE cipher is presented. The substitution box (S-box) and the inverse of S-box (S-box−1) blocks are the most complex blocks in the PRINCE cipher. These blocks are designed by an efficient structure with low critical path delay. In the low-cost structure, the S-boxes and S-boxes−1 are shared between the round computations and the intermediate step of PRINCE cipher. Therefore, the proposed architecture is implemented based on the lowest number of computation resources. The two-cycle implementation of PRINCE cipher is designed by a processing element (PE), which is a general and reconfigurable element. This structure has a regular form with the minimum number of the control signal. Implementation results of the proposed structures in 180-nm CMOS technology and Virtex-4 and Virtex-6 FPGA families are achieved. The proposed structures, based on the results, have better critical path delay and throughput compared with other's related works. 相似文献
3.
This paper introduces the research progress of the State Key Laboratory of Information Security (SKLOIS) in China during 2002–2006.
This introduction covers four selected areas with each covering some selected research findings. The four selected areas are:
the fundamentals of cryptography; the design, analysis and testing of block cipher algorithms; the design and analysis of
security protocols based on computational intractability; authentication, authorization and their applications. 相似文献
4.
5.
6.
Mihir Bellare Adriana Palacio 《Applicable Algebra in Engineering, Communication and Computing》2006,16(6):379-396
Key-insulated encryption schemes use a combination of key splitting and key evolution to protect against key exposure. Existing
schemes, however scale poorly, having cost proportional to the number t of time periods that may be compromised by the adversary, and thus are practical only for small values of t. Yet in practice t might be large.
This paper presents a strongly key-insulated encryption scheme with optimal threshold. In our scheme, t need not be known in advance and can be as large as one less than the total number of periods, yet the cost of the scheme
is not impacted. This brings key-insulated encryption closer to practice. Our scheme is based on the Boneh-Franklin identity-based
encryption (IBE) scheme [9], and exploits algebraic properties of the latter.
Another contribution of this paper is to show that (not strongly) key-insulated encryption with optimal threshold and allowing
random-access key updates (which our scheme and all others known allow) is equivalent to a restricted form of IBE. This means
that the connection between key-insulated encryption and IBE is not accidental.
Supported in part by NSF grants CCR-0098123, ANR-0129617 and CCR-0208842, and by an IBM Faculty Partnership Development Award.
Supported in part by an NSF graduate fellowship. 相似文献
7.
Yu Long Author Vitae Kefei Chen Author Vitae Shengli Liu Author Vitae 《Computers & Electrical Engineering》2007,33(3):166-176
This paper proposes an identity-based threshold decryption scheme IB-ThDec and reduces its security to the Bilinear Diffie-Hellman problem. Compared with previous work, this conceals two pairing computations in the ciphertext validity verification procedure. The formal proof of security of this scheme is provided in the random oracle model. Additionally, we show that IB-ThDec can be applied to the threshold key escrow and the mediated cryptosystems. 相似文献
8.
Threshold cryptography based on Asmuth-Bloom secret sharing 总被引:1,自引:0,他引:1
In this paper, we investigate how threshold cryptography can be conducted with the Asmuth-Bloom secret sharing scheme and present three novel function sharing schemes for RSA, ElGamal and Paillier cryptosystems. To the best of our knowledge, these are the first provably secure threshold cryptosystems realized using the Asmuth-Bloom secret sharing. Proposed schemes are comparable in performance to earlier proposals in threshold cryptography. 相似文献
9.
Probabilistic Visual Cryptography Schemes 总被引:1,自引:0,他引:1
10.
This article is concerned with various arithmetic operations inGF(2
m
). In particular we discuss techniques for computing multiplicative inverses and doing exponentiation. The method used for
exponentiation is highly suited to parallel computation. All methods achieve much of their efficiency from exploiting a normal
basis representation in the field. 相似文献