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Compatibility

				

				
				

					


	
Compatibility between Silver Key versions



	

	
			

				Silver Key 5 introduced a new parcel format – more secure and tamper-proof,
				offering a lot of new features.
			


			

				There is a drawback, though: older Silver Key versions don't know anything about
				this cool new format. If you try to decrypt a version 5 parcel with an older Silver Key
				version, you will see this message box:
			


				Compatibility error message

			

				This message means that the installed Silver Key version can't recognize the format
				of this new-style parcel, which needs a newer decryptor.
			




		
What Can Be Done Here?


			

				There are several ways to solve this problem:
			



		
Upgrading


			

				A rather obvious solution and also the best one. However if upgrading is
				out of the question, there are other methods.
			



		
Using self-decrypting parcels


			

				Self-decrypting parcels contain an embedded decryptor and so have
				no compatibility problem. You can create self-decrypting parcel in
				several ways; the simplest one is the Explorer's right-click command
				Create EXE Parcel.
			



		
Using compatibility mode


			

				Silver Key 5 can create old-style parcels that can be decrypted by older
				versions if you switch it to the compatibility mode:
			


			

				Double-click Silver Key desktop icon and press 'Settings'. Select the
				'Cipher' page; in the drop box 'Engine to use' select 'Silver Key 4.x
				compatibility' (or 3.x if the target version is really old). Press OK.
				Silver Key will now produce old-format files, decryptable by older
				versions.