Enigma allows you to edit, encrypt and decrypt the contents of the clipboard. The encrypted contents is saved as 7 bit ASCII text suitable for pasting into any electronic mail document. Clipboard encryption functions are accessed from the Edit Menu. The menu commands and their meaning are:
Selecting this command will encrypt the current contents of the clipboard. If necessary you will be asked to enter a key. The contents will be encrypted and saved as 7 bit ASCII text. If you are using a registered version of Enigma with full DES encryption you might want to consider selecting the "Use Limited DES" checkbox if the receiver of the message does not have a registered copy of Enigma.
Once encrypted the clipboard may be pasted into any Macintosh document.
The encrypted text is limited to a total of 32K. Because encrypted text takes up more space than the original clear text it is possible that the contents would exceed the 32K limit after encryption. If this situation applies Enigma will notify you. In this case consider splitting your message into two parts or using a self-extracting vault to send your message. The self-extracting vault will have to be binhexed before it can be emailed.
Enigma will attempt to decrypt the contents of the clipboard using the key provided by the user. Extraneous text on the clipboard (such as a short clear-text note at the beginning of the message) will not affect Enigma's ability to decrypt the contents. You must make sure that the header lines Enigma places at the beginning of the encrypted block are untouched. If Enigma can not find any encrypted text you will be notified. In that case the most likely problem is that the header has been corrupted somehow.
The clipboard contents will be replaced by the decrypted text. Note that the entire contents are replaced so that any information besides the encrypted block will no longer be on the clipboard.
Selecting this command allows you to view and edit the current clipboard contents. When you switch back to Enigma from another application the clipboard contents will automatically be updated. As mentioned above you can not create or edit a clipboard using Enigma that exceeds 32K. Attempting to paste or type more information into the clipboard will result in a polite error message from Enigma.