How to encrypt files

Hi,
My requirement is like...
I have encrypt and store files in the db. We know that files are stored in some binary format in the db. But then, I dont want anyone who knows how to read blobs from db to read those files without my knowledge. Please let me know what kind of encryption I can make use of?
Can I read a standard set of content from file. i.e. Read the first 1024 bytes, encrypt that and store it somewhere. Then read the next 1024 bytes, store it. And to retrieve in the same fashion as how stored earlier, and decrypt the content.
This is the crude logic that I have in mind. If anyone could suggest me any other better approach, that will be helpful for me.
Thanks in advance

I have seen several posts to these forums regarding encrypting pieces of databases, and the trouble always occurs when the poster tries to figure out key management.
Java makes encryption easy -- its just a few lines of code. The hard part is key management -- how do I generate an encryption key, arrange so that it is always available to the proper entities when needed, and that is never available to the entities that shouldn't have it.
The correct answers to these questions depends on many factors specific to your problem context, and on whether you want "real" security or merely to deter the lazy snoop.

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Message was edited by: Mark Hilderbrandt

Mark Hilderbrandt wrote:
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