Description: Jasypt (Java Simplified Encryption) is a java library which allows the developer to add basic encryption capabilities to his/her projects with minimum effort, and without the need of having deep knowledge on how cryptography works. Platform: |
Size: 9878528 |
Author:vinoth |
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Description: 完成基于非对称密码技术的对称密钥分配工作
说明：
（1）在完成上述基于公钥证书的非对称密钥分配工作的基础上，根据教材上基于非对称密码技术的对称密钥分配方案，完成对称密钥Ks的分配工作。
（2）A用Ks对一图象文件（test_pic.bmp)进行加密并发送给B，B收到后解密，对比原图象看是否一致，并记录整个加密/解密的所用时间T2；
（3）对比T1和T2；
要求：
（1）JAVA语言编程实现，基于RSA完成非对称密码技术的加/解密，基于DES完成对称密码技术的加/解密（JAVA有库函数支持）；
（2）通信内容为一图象文件（test_pic.bmp)；
（3）基于网络完成密钥分配工作（作为通信的双方A、B应部署于两台主机上）；
（4）所分配的对称密钥皆为一次一密，随机产生；
（5）具体密钥分配过程请以课本中基于非对称密码技术的对称密钥分配方案为参考，完成从步骤1到步骤4的全过程；-Completed based on asymmetric cryptography symmetric key distribution work
Description:
( 1 ) Upon completion of the above-mentioned asymmetric public key certificate-based key distribution based on the work , according to the materials on asymmetric cryptography-based symmetric key distribution scheme , the completion of the distribution of symmetric key Ks work .
(2) A use of an image file Ks (test_pic.bmp) is encrypted and sent to B, B to decrypt after receipt , compared to see if the same original image , and records the encryption/decryption used time T2
( 3 ) comparing T1 and T2
Requirements:
(1) JAVA programming language, based on the RSA asymmetric cryptographic techniques to complete encryption/decryption , based on the DES symmetric cryptographic techniques to complete the encryption/decryption (JAVA library functions are supported )
( 2) The content of the communication is an image file (test_pic.bmp)
( 3 ) complete network-based key distribution job ( as the Platform: |
Size: 15360 |
Author:丁元元 |
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Description: 密码学、DES算法实现，纯ｊａｖａ代码，能实现自动加密和解密，输入长度为９的数字-Cryptography, DES algorithm, pure java code, to achieve automatic encryption and decryption, digital input length of 9 Platform: |
Size: 3072 |
Author:冯文明 |
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Description: 实习三 基于RSA的公钥加密
一、实习目的
1、 理解公钥密码算法，熟悉常有的密码算法：RSA、椭圆曲线密码体制
2、 以RSA加密算法为例，掌握公钥密码算法加解密过程的实现。
二、实习内容
以RSA为例，利用java中的相关类实现对指定字符串的加解密。
1、 生成公钥密钥对
(1)利用java中的KeypairGenerator类创建公钥密钥对，利用KeypairGenerator的静态方法getInstance（）获得KeypairGenerator类型的对象，所需参数为加密算法的名称RSA。
KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA")
(2)利用KeyPairGenerator类的genKeyPair()方法返回生成的密钥对：
KeyPair kp = kpg.genKeyPair()
(3)返回此密钥对的公钥组件的引用和私钥组件的引用
PublicKey pbkey = kp.getPublic()
PrivateKey prkey = kp.getPrivate()
(4)将生成的公钥写入文件Skey_RSA_pub.dat
FileOutputStream f1 = new FileOutputStream("Skey_RSA_pub.dat")
ObjectOutputStream b1 = new ObjectOutputStream(f1)
b1.writeObject(pbkey)
用同样的方法将私钥写入文件Skey_RSA_pri.dat
-Internship RSA public key encryption based on three
An internship purpose
An understanding of public key cryptography algorithm, familiar with common cryptographic algorithms: RSA, elliptic curve cryptography
2, RSA encryption algorithm, for example, public key cryptography algorithm to achieve master encryption and decryption process.
Second, the practical content
In RSA, for example, the use of java in the relevant class implements the specified string encryption and decryption.
1, generates a public key pair
(1) the use of java class in KeypairGenerator create a public key pair using KeypairGenerator static method getInstance () to get the object KeypairGenerator type parameters required for the encryption algorithm name RSA.
KeyPairGenerator kpg = KeyPairGenerator.getInstance ("RSA")
(2) the use of genKeyPair KeyPairGenerator class () method returns the generated key pair:
KeyPair kp = kpg.genKeyPair ()
References (3) Returns the public key component of this key an Platform: |
Size: 2048 |
Author:杨平 |
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Description: JAVA非对称加密技术，RSA加解密。
利用公钥加密特定文件（test-1.txt），并用私钥进行解密；反过来，再利用私钥加密特定文件，并用公钥进行解密。对比解密后的文件与原始文件是否一致。-JAVA asymmetric encryption technology, RSA encryption and decryption. The use of public key cryptography specific file (test-1.txt), and with the private key to decrypt in turn, re-use private key to encrypt specific files, and use the public key to decrypt it. Compare the decrypted file if the original file is consistent. Platform: |
Size: 787456 |
Author:zxp |
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Description: bouncycastle.jar是一种用于 Java 平台的开放源码的轻量级密码术包。它支持大量的密码术算法,并提供 JCE 1.2.1 的实现。-bouncycastle.jar lightweight cryptography package is an open-source Java platform used. It supports a large number of cryptographic algorithms and provide JCE 1.2.1 implementation. Platform: |
Size: 5225472 |
Author:郑漾 |
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Description: this script talks about encryption in java which containing the example script to doing classical cryptography such as classic cipher, transposition cipher, affinecipher and so on. so let s learn together-this script talks about encryption in java which containing the example script to doing classical cryptography such as classic cipher, transposition cipher, affinecipher and so on. so let s learn together.. Platform: |
Size: 12288 |
Author:su |
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Description: DES java code
The Data Encryption Standard (DES, /ˌ diː ˌ iː ˈ ɛ s/ or /ˈ dɛ z/) was once a predominant symmetric-key algorithm for the encryption of electronic data. It was highly influential in the advancement of modern cryptography in the academic world. Platform: |
Size: 3072 |
Author:Sparkle |
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Description: 实验内容
1、对称密码技术的实现
（1）熟悉相应的DES加密/解密函数的使用，在单机完成对特定文件（test-1.txt）的单重DES加密/解密；
（2）针对DES密钥特点（8字节，64比特位，其中真正起作用的为56比特位），设计一次一密的密钥产生机制（即每次会话所使用的密钥都是临时随机产生的）；
2、非对称密码技术的实现
（1）熟悉RSA相关函数（公私钥生成函数，加密/解密函数）；
（2）利用公钥加密特定文件（test-1.txt），并用私钥进行解密；反过来，再利用私钥加密特定文件，并用公钥进行解密。对比解密后的文件与原始文件是否一致。
3、信息摘要技术的实现
（1）熟悉MD5算法的实现函数；
（2）利用MD5实现函数，对特定文件（test-1.txt）进行信息摘要的计算，得到信息摘要M1；尝试改变特定文件中的内容（比如改变其中某个字母），再利用MD5计算一次信息摘要，看同之前得到的信息摘要是否相同；
设计要求
1、JAVA语言编程实现
2、单机上完成
3、加密内容为一文本文件（从服务器下载），从服务器上下载相关软件包（jce-1_2_2和帮助文件，主要用于RSA密钥生成和加/解密,如果安装了JDK1.6版本以上，则不需要jce支持）后，请先阅读帮助再进行编程。(DES/RSA/MD5
The implementation of symmetric cryptography
(1) familiar with the use of the corresponding DES encryption / decryption function, complete single DES encryption / decryption of a particular file (test-1.txt) in a single machine;
(2) for DES key features (8 bytes, 64 bits, which really works for 56 bits), the design of a secret key generation mechanism (i.e. using the session key is randomly generated temporary);) Platform: |
Size: 16384 |
Author:潇洒坤
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Description: 通过实验，使学生对古典密码学有充分的认识；学会正确使用编程语言（C/C++、Java、Maple等）实现希尔密码与攻击，验证课堂中所学的古典密码算法；为学习现代密码算法及其应用奠定基础。(Through the experiment, the students have sufficient knowledge of classical cryptography; learn the proper use of programming languages (C/C++, Java, Maple etc.) to achieve the Hill code and attack, classical cryptographic algorithm validation in the classroom; lay the foundation for the study of modern cryptography and its application.) Platform: |
Size: 81920 |
Author:斩月
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