How to Encrypt with no Padding (encrypted output size equals input size)

Block encryption algorithms, such as AES, will produce output that is a multiple of the algorithm’s block size. For AES, the output is a multiple of 16 bytes. However, this is for the typically used cipher modes “CBC” (Cipher Block Chaining) and “ECB” (Electronic Cookbook). There are other cipher modes …

Posts about Matching Encryption Output for Different Systems

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Format of AES, Blowfish, Twofish, 3DES, etc. Symmetric Encrypted Data?

Question: I know it isn’t listed in the documentation, but is there any method to test whether a file has been previously encrypted or not?  I would like to perform decryption on a file, but only if it is already encrypted. Answer: A symmetric encryption algorithm is simply a transformation …

Matching MySQL’s AES_ENCRYPT Functions

The following example programs demonstrate how to match MySQL’s AES_ENCRYPT function in different programming languages: ASP: Match MySQL AES_ENCRYPT Function SQL Server: Match MySQL AES_ENCRYPT Function C#: Match MySQL AES_ENCRYPT Function C++: Match MySQL AES_ENCRYPT Function MFC: Match MySQL AES_ENCRYPT Function C: Match MySQL AES_ENCRYPT Function Delphi: Match MySQL AES_ENCRYPT …

Encrypting Chinese Characters

Question: Why is it the return is blank when encrypting chinese characters? Here’s a snippet of my code: crypt.KeyLength := 256; crypt.SecretKey := Password; crypt.CryptAlgorithm := ‘aes’; crypt.EncodingMode := ‘base64’; OutPutStr := crypt.EncryptStringENC(StringToEncrypt); Answer: Strings in some programming languages such as Visual Basic, C#, VB.NET, Delphi, Foxpro, etc. should be …