Excel Encryption

[PT]

I'd like to protect certain spreadsheets using the Excel 2003 built-in
encryption. Just on a hunch, I Googled Excel Encryption, and discovered a
variety of programs claiming to be able to open any such encrypted files,
regardless of password complexity.

Is this correct?

If so, is there any convenient way to encrypt effectively?

 

[Alan]

Yes it is, Excel protection is very weak and whatever password you use can
be broken easily by anyone with a little knowledge and the will to do so.
It's not really meant for high security, more to prevent accidental
overwriting etc.
Regards,
Alan.