The encryption improvements planned for Office 2007 Service Pack 2 will place the system on par with Office 14. “With the new encryption, we're introducing a bunch of very cool stuff: configurable symmetric encryption; cipher-block chaining (CBC or CFB); configurable hashing algorithms; support for block ciphers with block sizes from 2 to 4096 bytes; configurable salt, up to 64k bytes; iterated hashing of passwords up to 10 million iterations (default raised to 100,000); and integrity checking,” stated David LeBlanc, senior security technologist in Microsoft’s Information Technology Group.

Source:→ Softpedia