With http://fnpaste.com/ you have a lot of options:
A hidden paste is viewable by anyone with the paste ID or URL, but will not show up on any public paste lists or be indexed by search engines. This is the default visibility setting for new pastes.
•Private pastes are only accessible via the secure paste URL, which contains a special hash code to ensure that no one guesses or brute-forces the paste URL. Anyone you give the secure URL to can view your paste.
(example: http://fnpaste.com/L8AW?hash=6b4ace7bd80fa2e5f57bc276ee2473c0 )
2nd: Encryption Password
•If you provide an encryption password, your paste will be encrypted so that only people with the password can view it.
We have no way of decrypting pastes without your password, so please don't lose it!
3rd: Paste Expiration Date
•You can control when your paste expires. By default, pastes do not expire and will live happily forever.
4rd: Paste Availability Date
• You can control when your paste will be available to the world. By default, pastes are available immediately after creation.
Try using this along with the Email Notification option for sending someone your top-secret spy data at a specific date/time. Once created, your paste will be emailed to the recipient automatically (unless it is deleted before the availability date!)
5th: Email Notification
6th: Delete Code