encryption-symmetric

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How to use secure encryption of an existing column in SQL Server 2005

I want to encrypt an existing column in SQL Server 2005, using an UPDATE statement, moving the old content into the new encrypted column.[详细]

2023-01-16 11:42 分类：问答
Simple XOR a message (Javascript/Tcl)?

I need the username/password to be scrambled at the client-side before sending it over via HTTP GET/POST. And the server will decode it with Tcl, before the checks against database.[详细]

2023-01-11 01:41 分类：问答
PHP AES encrypt / decrypt

I found an example for en/decoding strings in PHP. At first it looks very good but it wont work :-( Does anyone know what the problem is?[详细]

2023-01-10 23:29 分类：问答
Using Rijndael encryption for large files

I\'m in a situation where I need to encrypt / decrypt a file of n length securely, ideally using Rijndael, but definitely at 256bit encryption.[详细]

2023-01-09 17:47 分类：问答
Calculation of encrypted file size does not match true size

I have the need to calculate the size of a file I am encrypting using Rijndael. According to other answers on this site, and on google, the following is the correct way of calculat开发者_如何学Going[详细]

2023-01-09 00:58 分类：问答
Differences between CAPICOM TripleDES and System.Security.Cryptography TripleDES

I\'m trying to move away from using CAPICOM since I can no longer use it (64-bit Windows 7 machine). The existing code for using TripleDES is like this:[详细]

2023-01-08 06:48 分类：问答
Getting 'BadPaddingException: pad block corrupted' in AES/CBC/PKCS5Padding

My constants public static final String AES_ALGORITHM_MODE_PADDING = \"AES/CBC/PKCS5Padding\"; public static final String AES = \"AES\";[详细]

2023-01-06 04:26 分类：问答
Static or random IV for a license file

I have made a small program that will allow me to send licenses in encrypted form to users. At the moment I have[详细]

2023-01-05 13:23 分类：问答
How to authenticate client based on possession of symmetric key?

Our clients开发者_开发问答 call our web service over SSL and authenticate themselves with a username and password. Our server then generates a symmetric key and sends it back to the client.[详细]

2023-01-05 10:26 分类：问答
Symmetric Bijective Algorithm for Integers

I need an algorithm that can do a one-to-one mapping (ie. no collision) of a 32-bit signed integer onto another 32-bit signed integer.[详细]

2023-01-05 03:12 分类：问答