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Yellow dots on white paper, produced by color laser printer (enlarged, dot diameter about 0.1 mm) Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was ...
For example, "GOOD DOG" can be encrypted as "PLSX TWF" where "L", "S", and "W" substitute for "O". With even a small amount of known or estimated plaintext, simple polyalphabetic substitution ciphers and letter transposition ciphers designed for pen and paper encryption are easy to crack. [5]
Polygraphic substitution cipher: the unit of substitution is a sequence of two or more letters rather than just one (e.g., Playfair cipher) Transposition cipher: the ciphertext is a permutation of the plaintext (e.g., rail fence cipher) Historical ciphers are not generally used as a standalone encryption technique because they are quite easy to ...
This makes it ideal for demonstrating encryption and decryption processes, as it ensures that all letters of the alphabet are included in the example. In a K2 Aristocrat Cipher, the ciphertext alphabet is constructed by placing the keyword at the beginning of the alphabet, followed by the remaining letters in their standard order, omitting ...
Canon RAW Format Version 2 [12] Canon's RAW format is based on TIFF. [13] 80 2A 5F D7 €*_×: 0 cin Kodak Cineon image: 52 4E 43 01 52 4E 43 02: RNC␁ RNC␂ 0 Compressed file using Rob Northen Compression (version 1 and 2) algorithm [14] 4E 55 52 55 49 4D 47 4E 55 52 55 50 41 4C: NURUIMG NURUPAL: 0 nui nup nuru ASCII/ANSI image and palette ...
Encrypt the data you send: Private Wifi uses premium-level security to encrypt everything you send and receive on your computer or mobile device over public WiFi. Real-time data protection: DataMask by AOL creates a secure browsing experience by using anti-keylogging and anti-phishing software that helps protect you from internet threats and ...
One way to implement this quantum one-time pad is by dividing the 2n bit key into n pairs of bits. To encrypt the state, for each pair of bits i in the key, one would apply an X gate to qubit i of the state if and only if the first bit of the pair is 1, and apply a Z gate to qubit i of the state if and only if the second bit of the pair is 1.
This type of early encryption was used throughout Ancient Greece and Rome for military purposes. [2] One of the most famous military encryption developments was the Caesar cipher, in which a plaintext letter is shifted a fixed number of positions along the alphabet to get the encoded letter. A message encoded with this type of encryption could ...