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- One-time_pad abstract "In cryptography, a one-time pad (OTP) is an encryption technique that cannot be cracked if used correctly. In this technique, a plaintext is paired with random, secret key (or pad). Then, each bit or character of the plaintext is encrypted by combining it with the corresponding bit or character from the pad using modular addition. If the key is truly random, at least as long as the plaintext, never reused in whole or in part, and kept completely secret, the resulting ciphertext will be impossible to decrypt or break. It has also been proven that any cipher with the perfect secrecy property must use keys with effectively the same requirements as OTP keys. However, practical problems have prevented one-time pads from being widely used.First described by Frank Miller in 1882, the one-time pad was re-invented in 1917 and patented a couple of years later. It is derived from the Vernam cipher, named after Gilbert Vernam, one of its inventors. Vernam's system was a cipher that combined a message with a key read from a punched tape. In its original form, Vernam's system was vulnerable because the key tape was a loop, which was reused whenever the loop made a full cycle. One-time use came a little later when Joseph Mauborgne recognized that if the key tape were totally random, cryptanalysis would be impossible.The "pad" part of the name comes from early implementations where the key material was distributed as a pad of paper, so the top sheet could be easily torn off and destroyed after use. For easy concealment, the pad was sometimes reduced to such a small size that a powerful magnifying glass was required to use it. Photos show captured KGB pads that fit in the palm of one's hand, or in a walnut shell. To increase security, one-time pads were sometimes printed onto sheets of highly flammable nitrocellulose so they could be quickly burned.There is some ambiguity to the term because some authors use the terms "Vernam cipher" and "one-time pad" synonymously, while others refer to any additive stream cipher as a "Vernam cipher", including those based on a cryptographically secure pseudorandom number generator (CSPRNG).".
- One-time_pad thumbnail One-time_pad.svg?width=300.
- One-time_pad wikiPageExternalLink one-time-pad-cryptography.
- One-time_pad wikiPageExternalLink d.rijmenants.
- One-time_pad wikiPageExternalLink onetimepad.htm.
- One-time_pad wikiPageExternalLink one_time_pad.pdf.
- One-time_pad wikiPageExternalLink OTP.
- One-time_pad wikiPageID "22210".
- One-time_pad wikiPageRevisionID "605485941".
- One-time_pad hasPhotoCollection One-time_pad.
- One-time_pad subject Category:Cryptography.
- One-time_pad subject Category:Information-theoretically_secure_algorithms.
- One-time_pad subject Category:Stream_ciphers.
- One-time_pad type Abstraction100002137.
- One-time_pad type Act100030358.
- One-time_pad type Activity100407535.
- One-time_pad type Algorithm105847438.
- One-time_pad type Cipher106254239.
- One-time_pad type Communication100033020.
- One-time_pad type Event100029378.
- One-time_pad type Information-theoreticallySecureAlgorithms.
- One-time_pad type Message106253690.
- One-time_pad type Procedure101023820.
- One-time_pad type PsychologicalFeature100023100.
- One-time_pad type Rule105846932.
- One-time_pad type StreamCiphers.
- One-time_pad type YagoPermanentlyLocatedEntity.
- One-time_pad comment "In cryptography, a one-time pad (OTP) is an encryption technique that cannot be cracked if used correctly. In this technique, a plaintext is paired with random, secret key (or pad). Then, each bit or character of the plaintext is encrypted by combining it with the corresponding bit or character from the pad using modular addition.".
- One-time_pad label "Cifrario di Vernam".
- One-time_pad label "Libreta de un solo uso".
- One-time_pad label "Masque jetable".
- One-time_pad label "One-Time-Pad".
- One-time_pad label "One-time pad".
- One-time_pad label "One-time pad".
- One-time_pad label "One-time pad".
- One-time_pad label "Szyfr z kluczem jednorazowym".
- One-time_pad label "Шифр Вернама".
- One-time_pad label "لوحة المرة الواحدة".
- One-time_pad label "ワンタイムパッド".
- One-time_pad label "一次性密碼本".
- One-time_pad sameAs Vernamova_šifra.
- One-time_pad sameAs One-Time-Pad.
- One-time_pad sameAs Libreta_de_un_solo_uso.
- One-time_pad sameAs Masque_jetable.
- One-time_pad sameAs Cifrario_di_Vernam.
- One-time_pad sameAs ワンタイムパッド.
- One-time_pad sameAs One-time_pad.
- One-time_pad sameAs Szyfr_z_kluczem_jednorazowym.
- One-time_pad sameAs One-time_pad.
- One-time_pad sameAs m.05kp8.
- One-time_pad sameAs Q150474.
- One-time_pad sameAs Q150474.
- One-time_pad sameAs One-time_pad.
- One-time_pad wasDerivedFrom One-time_pad?oldid=605485941.
- One-time_pad depiction One-time_pad.svg.
- One-time_pad isPrimaryTopicOf One-time_pad.
