one-time pad

(redirected from One-time tape)
Also found in: Acronyms, Encyclopedia.

one-time pad

(wŭn′tīm′)
n.
A key used in private-key cryptography that is the same length as the contents of the message being encrypted, providing unbreakable encryption if the key is perfectly random and used only once.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.