EncDec is a free Delphi unit to encode and decode string
EditBy: EncDec is a free Delphi unit to encode and decode String. It doesnt uses any sophisticated industry standard encryption method, it simply mimics Base64 encoding with a configurable key. This unit is useful when you want to obscure a text and store it also as a string. I use this unit to store a string encoded in an INI file.
* function EncodeString(const Str: string): string;
Encodes a string defined by Str. The result is also a string type.

* function EncodeString(const Str: string): string;
Decodes an encoded string defined by Str.

* var EncDecKey: string;
Is a global variable that is used by EncodeString and DecodeString functions. It must be 65 characters in length, no duplicate Chars, uppercases and lowercases are allowed. you can free download EncDec Library 1.0 now.