OTP meaning in Military and Defence ?

Answer: What is One Time Pad mean?

In cryptography, the one-time pad (OTP) is an encryption technique that cannot be cracked, but requires the use of a single-use pre-shared key that is no smaller than the message being sent. In this technique, a plaintext is paired with a random secret key (also referred to as a one-time 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.

The resulting ciphertext will be impossible to decrypt or break if the following four conditions are met:

The key must be random (uniformly distributed and independent of the plaintext), and sampled from a non-algorithmic, chaotic source such as a Hardware random number generator.The key must be at least as long as the plaintext.The key must never be reused in whole or in part.The key must be kept completely secret by the communicating parties.

It has also been mathematically proven that any cipher with the property of perfect secrecy must use keys with effectively the same requirements as OTP keys. Digital versions of one-time pad ciphers have been used by nations for critical diplomatic and military communication, but the problems of secure key distribution make them impractical for most applications.

First described by Frank Miller in 1882, the one-time pad was re-invented in 1917. On July 22, 1919, U.S. Patent 1,310,719 was issued to Gilbert Vernam for the XOR operation used for the encryption of a one-time pad. Derived from his Vernam cipher, the 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 later, when Joseph Mauborgne recognized that if the key tape were totally random, then 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, allowing the current top sheet to be torn off and destroyed after use. For concealment the pad was sometimes so small that a powerful magnifying glass was required to use it. The KGB used pads of such size that they could fit in the palm of a hand, or in a walnut shell. To increase security, one-time pads were sometimes printed onto sheets of highly flammable nitrocellulose, so that they could easily be burned after use.

There is some ambiguity to the term "Vernam cipher" because some sources use "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).

reference

Full Form	Category
Oneness Trust Passion	Academic & Science
Bucharest	Airport Code
One Time Password	Banking
OEM (Original Equipment Manufacturer) Technology Provider	Business
Országos Takarékos Pénztár	Business
Over the Page	Business
Once Tamed Productions	Business
Orsz?os Takar?os P?zt?	Business
Outstanding Teacher Programme	Community
On The Planet	Community
Old Testament Pseudepigrapha	Community
Ought To Pass	Community
Overview of The Process	Community
Occupy The Populace	Community
Occupational Training Programme	Community
Over-temperature Protection	Computer Hardware
Objective Technical Problem	Computing
Office of Technology Policy	Computing
Over The Phone	Computing
Open Trading Protocol	Computing
Online Team Play	Computing
Open Technology Platform	Computing
Order Transaction Processing	Computing
One Time Payment	Computing
Oracle Tuning Pack	Computing
Organization Technology People	Computing
On The Potty	General
Over The Pants	General
Online Transaction Process	General
One Time Passcodes	General
Optimal Team Practice	General
Opioid Treatment Programs	General
Orientation Transition Programs	General
Orientation and Transition Programs	General
Ontario Truck Plant	General
Offener Tourenwagen Polizei	General
Oldtimer Praxis	General
One Time Passwords	General
One Time Passcode	General
Other Tobacco Products	General
One Time Pin	General
Open Telematic Platform	General
Open Tech Programme	General
One True Paring	General
One True Pain	General
Open Training Platform	General
On Time Performance	General
Orsz?os Takar? P?zt?	General
Official Titans Podcast	General
Own The Podium	General
Országos Takarék Pénztár	General
Oregon Transportation Plan	Governmental
Out of Turn Priority	Governmental
Office of The Prosecutor	Governmental
On The Prowl	Governmental
Official Tea Party	Governmental
Office of Telecommunications Policy	Governmental
One Term President	Governmental
OTTAPPALAM	Indian Railway Station
Optional Term Policy	Insurance
Oh The Pain	Internet
On the phone	Internet Slang
Origin Template Plot	Maths
One Tree Point	Maths
Opiate Treatment Program	Medical
Opioid Treatment Program	Medical
Off Topic Post	Messaging
One True Pairing	Messaging
Offer To Purchase	Messaging
Outside The Perimeter	Military and Defence
Operational Test Plan	Military and Defence
Outline Test Plan	Military and Defence
One Time Pad	Military and Defence
Opposite Track Path	Military and Defence
On The Porch	Radio Science
Option To Purchase	Real Estate
Otopeni, Romania	Regional
One Time Programming	Softwares
One Time Programmable	Softwares
Online Theme Park	Softwares
On-going Test Plan	Softwares
Operational Test Procedure	Space Science
Operations Test Plan	Space Science
Operations Turnaround Plan	Space Science
Off The Path	Sports
Out To Practice	Sports
Olympic Trial Participant	Sports
Open Telecommunications Platform	Telecommunication
On The Premises	Telecommunication
Open Telecom Platform	Telecommunication
Bucharest Otopeni International Airport	Transport & Travel
Ottapalam	Transport & Travel