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Why does base64 encoding require padding if the input length is not divisible by 3?
What is the purpose of padding in base64 encoding. The following is the extract from wikipedia:
3 Answers
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Why does C++ not have reflection?
This is a somewhat bizarre question. My objectives are to understand the language design decision and to identify the possibilities of reflection in C++.
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Fundamental difference between Hashing and Encryption algorithms
I see a lot of confusion between hashes and encryption algorithms and I would like to hear some more expert advice about:
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不同品牌的防火墙组成高可靠性集群 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...问题的时候，可以自动切换到备防火墙上。第一台设备 ASG 425 支持OSPF...拓扑如下
主机A ，B有两个可用路由要实现主备切换，当主防火墙出现问题的时候，可以自动切换到备防火墙上。
第一台设备 ASG 425 支持OSPF BGP PIM路由...
Understanding REST: Verbs, error codes, and authentication
I am looking for a way to wrap APIs around default functions in my PHP-based web applications, databases and CMSs.
10 Answ...
Protect .NET code from reverse engineering?
Obfuscation is one way, but it can't protect from breaking the piracy protection security of the application. How do I make sure that the application is not tampered with, and how do I make sure that the registration mechanism can't be reverse engineered?
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Two-way encryption: I need to store passwords that can be retrieved
I am creating an application that will store passwords, which the user can retrieve and see. The passwords are for a hardware device, so checking against hashes are out of the question.
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What's the “big idea” behind compojure routes?
I'm new to Clojure and have been using Compojure to write a basic web application. I'm hitting a wall with Compojure's defroutes syntax, though, and I think I need to understand both the "how" and the "why" behind it all.
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分布式系统的事务处理 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...据一致性。这个是一个很难的问题。 让我们用最经典的Use Case：“A帐号向B帐号汇钱”来说明一下，熟悉RDBMS事务的都知道从帐号A到帐号B需要6个操作：
从A帐号中把余额读出来。
对A帐号做减法操作。
把结果写回A帐号中。
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How to create a video from images with FFmpeg?
This line worked fine but I want to create a video file from images in another folder.
Image names in my folder are:
4 Answ...