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编译好的 openSSL 最新版本 2023年的 March 14, 2023 - OpenSSL 3.1 is available. Also, Happy Pi Day. Users should currently install a 1.1.1 series + a 3.x series for maximum application compatibility. All application developers should begin migrating their applications to use OpenSSL 3.x series. Note that 3.0.x is a LTS release series while 3.1.x is not.

wireshark抓包英文教材，英文原版教材。作者 Chris Sanders

To overcome the challenges encountered in chaotic image encryption system, such as dynamic degradation, weak security, and low encryption efficiency, this paper proposes a new image encryption algorithm. In terms of key generation method, a roulette wheel selection algorithm is designed, which effectively reduces dynamic degradation. In pixel coding, a linear congruence pixel transformation method is proposed, which enhances the security of pixel transform. In the overall layout of the encryption algorithm, the substitution-permutation-substitution structure is adopted. Under the joint action of various aspects, encryption efficiency is improved while security of our proposed encryption algorithm is guaranteed. Additionally, during design, the motivation of each part of the algorithm is explained. Theoretical analysis and experimental results show our proposed algorithm has a good application prospect

这本书中，有一些很实用的内容，包括如何高效学习、战胜拖延、有序地生活等等。每个方面的内容对大学生都很有借鉴意义，推荐给学生党。如何有效地阅读课本，记笔记，写好论文，消除干扰。 另外，我们还能了解到国外大学的生活是什么样的。

In this paper we propose a new image randomness measure using Shannon entropy over local image blocks. The proposed local Shannon entropy measure overcomes several weaknesses of the conventional global Shannon entropy measure, including unfair randomness comparisons between images of different sizes, failure to discern image randomness before and after image shuffling, and possible inaccurate scores for synthesized images. Statistical tests pertinent to this new measure are also derived. This new measure is therefore both quantitative and qualitative. The parameters in the local Shannon entropy measure are further optimized for a better capture of local image randomness. The estimated statistics and observed distribution from 50,000 experiments match the theoretical ones. Finally, two examples are given, applying the proposed measure to image randomness among shuffled images and encrypted images. Both examples show that the proposed method is more effective and more accurate than the global Shannon entropy measure

经典教材 1964年出版 找了好久才获得的