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One-Time Pads | by The Central Intelligence Agency
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One-Time Pads

One-time pads (OTP) are used to encode/decode agent communications. They are issued in matching sets of two: one for the encoder and one for the decoder, and no two pages are alike. Each sheet contains a random key in the form of five-digit groups. Once a sheet has been used to encode a message, it is torn off the pad and destroyed. If used as designed, encryption by OTP is virtually unbreakable.

  

For more information on CIA history and this artifact please visit www.cia.gov

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Taken on March 7, 2011