aes

I am looking to encrypt some data using Rijndael/AES in VBScript using a specific key and IV value. Are there any good function libraries or COM components that would be good to use? I looked at CAPICOM ; it allows a passphrase only, and won't allow setting specific key and IV values. Old question- that really never gets old! One way is to declare encryption classes within vbscript, without needing external added COM objects or wrapper. The following example takes a string, encrypts and decrypts using Rijndael managed class: '----------------------------------------------------- Dim obj,arr,i

I want to encrypt/decrypt lots of small (2-10kB) pieces of data. The performance is ok for now: On a Core2Duo, I get about 90 MBytes/s AES256 (when using 2 threads). But I may need to improve that in the future - or at least reduce the impact on the CPU. Is it possible to use dedicated AES encryption hardware with Java (using JCE, or maybe a different API)? Would Java take advantage of special CPU features (SSE5?!), if I get a better CPU? Or are there faster JCE providers? (I tried SunJCE and BouncyCastle - no big difference.) Other possiblilities? The JVM will not, by itself, take advantage

查看日志发现出现此异常 　　 javax.crypto.BadPaddingException: Given final block not properly padded 后面百度了一下终于解决了，在生成key的时候出现错误的 原来的代码： private Key initKeyForAES(String key) throws NoSuchAlgorithmException { if (null == key || key.length() == 0) { throw new NullPointerException("key not is null"); } SecretKeySpec key2 = null;try { KeyGenerator kgen = KeyGenerator.getInstance("AES"); kgen.init(128, new SecureRandom(key.getBytes()) ); SecretKey secretKey = kgen.generateKey(); byte[] enCodeFormat = secretKey.getEncoded(); key2 = new SecretKeySpec(enCodeFormat, "AES"); } catch (NoSuchAlgorithmException ex) {

第5章 多变量图 多变量图显示三个或更多变量之间的关系。有两种常用的方法可以容纳多个变量：分组和分面。 5.1 分组 在分组中，前两个变量的值映射到 x 和 y轴 。然后将其他变量映射到其他视觉特征，例如 颜色 ， 形状 ， 大小 ， 线型 和 透明度 。 分组 允许您在单个图形中绘制多个组的数据。 使用 Salaries 数据集，让我们显示 yrs.since.phd 和 salary 之间的关系。 library(tidyverse) data(Salaries, package="carData") Salaries %>% glimpse() # plot experience vs. salary ggplot(Salaries, aes(x = yrs.since.phd, y = salary)) + geom_point() + labs(title = "Academic salary by years since degree") 图5.1：简单的散点图 接下来，让我们使用 颜色 包括教授的等级。 # plot experience vs. salary (color represents rank) ggplot(Salaries, aes(x = yrs.since.phd, y = salary, color=rank)) + geom_point() +

I'm trying to implement AES in Java and this is the code I use: byte[] sessionKey = {00000000000000000000000000000000}; byte[] iv = {00000000000000000000000000000000}; byte[] plaintext = "6a84867cd77e12ad07ea1be895c53fa3".getBytes(); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(sessionKey, "AES"), new IvParameterSpec(iv)); byte[] ciphertext = cipher.doFinal(plaintext); cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(sessionKey, "AES"), new IvParameterSpec(iv)); byte[] deciphertext = cipher.doFinal(ciphertext); I need this

I found a guide for implementing AES encryption/decryption in Java and tried to understand each line as I put it into my own solution. However, I don't fully understand it and am having issues as a result. The end goal is to have passphrase based encryption/decryption. I've read other articles/stackoverflow posts about this, but most do not provide enough explanation (I am very new to crypto in Java) My main issues right now are that even when I set byte[] saltBytes = "Hello".getBytes(); I still get a different Base64 result in the end ( char[] password is random each time, but I read that it

CMDB和运维自动化 2018-05-05 IT运维的分类 传统运维痛点 自动化运维平台的特性 资产管理系统（CMDB） CMDB包含的功能 CMDB实现的四种方式 IT运维的分类 IT运维，指的是对已经搭建好的网络，软件，硬件进行维护。运维领域也是细分的，有硬件运维和软件运维 硬件运维主要包括对基础设施的运维，比如机房的设备，主机的硬盘，内存这些物理设备的维护 软件运维主要包括系统运维和应用运维，系统运维主要包括对OS，数据库，中间件的监控和维护，这些系统介于设备和应用之间，应用运维主要是对线上业务系统的运维 这里讨论的主要是软件运维的自动化，包括系统运维和应用运维的自动化 传统运维痛点 日常工作繁琐 日常运维工作是比较繁琐的，研发同学会经常需要到服务器上查日志，重启应用，或者是说今天上线某个产品，需要部署下环境。这些琐事是传统运维的大部分工作 应用运行环境不统一 在部署某应用后，应用不能访问，就会听到开发人员说，在我的环境运行很好的，怎么部署到测试环境后，就不能用了，因为各类环境的类库不统一 还有一种极端情况，运维人员习惯不同，可能凭自己的习惯来安装部署软件，每种服务器上运行软件的目录不统一 运维及部署效率低下 想想运维人员需要登陆到服务器上执行命令，部署程序，不仅效率很低，并且非常容易出现人为的错误，一旦手工出错，追溯问题将会非常不容易 无用报警信息过多