Can a record store be encrypted?
You might want to encrypt a record store to protect access to it other than through the application that manages it. It would defeat the purpose of securing an application against unauthorised use, if the hacker could simply read the record store at the operating system level (on PalmOS, the record stores seen by MIDP can also be downloaded to a PC). There is no built-in support for data encryption in MIDP/CLDC. However, it is not difficult to implement a Java version of an algorithm of, say, IDEA or Blowfish. You’ll only need a dozen lines of Java code. Alternatively, find an open-source project that has already done it. See, for example, Bouncy Castle.
