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De Furtivis Literarum Notis
''De Furtivis Literarum Notis'' (''On the Secret Symbols of Letters'') is a 1563 book on cryptography written by Giambattista della Porta. The book includes three sets of cypher discs for coding and decoding messages, a substitution cipher improving on the work of Al-Qalqashandi Shihāb al-Dīn Abū 'l-Abbās Aḥmad ibn ‘Alī ibn Aḥmad ‘Abd Allāh al-Fazārī al-Shāfiʿī better known by the epithet al-Qalqashandī (; 1355 or 1356 – 1418), was a medieval Arab Egyptian encyclopedist, polymath and mathemati ..., and one of the earliest known music substitution ciphers. References 1563 books Cryptography books Non-fiction books {{tech-book-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptography
Cryptography, or cryptology (from "hidden, secret"; and ''graphein'', "to write", or ''-logy, -logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of Adversary (cryptography), adversarial behavior. More generally, cryptography is about constructing and analyzing Communication protocol, protocols that prevent third parties or the public from reading private messages. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, information security, electrical engineering, digital signal processing, physics, and others. Core concepts related to information security (confidentiality, data confidentiality, data integrity, authentication, and non-repudiation) are also central to cryptography. Practical applications of cryptography include electronic commerce, Smart card#EMV, chip-based payment cards, digital currencies, password, computer passwords, and military communications. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Substitution Cipher
In cryptography, a substitution cipher is a method of encrypting in which units of plaintext are replaced with the ciphertext, in a defined manner, with the help of a key; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth. The receiver deciphers the text by performing the inverse substitution process to extract the original message. Substitution ciphers can be compared with transposition ciphers. In a transposition cipher, the units of the plaintext are rearranged in a different and usually quite complex order, but the units themselves are left unchanged. By contrast, in a substitution cipher, the units of the plaintext are retained in the same sequence in the ciphertext, but the units themselves are altered. There are a number of different types of substitution cipher. If the cipher operates on single letters, it is termed a simple substitution cipher; a cipher that operates on larger groups of lett ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Al-Qalqashandi
Shihāb al-Dīn Abū 'l-Abbās Aḥmad ibn ‘Alī ibn Aḥmad ‘Abd Allāh al-Fazārī al-Shāfiʿī better known by the epithet al-Qalqashandī (; 1355 or 1356 – 1418), was a medieval Arab Egyptian encyclopedist, polymath and mathematician. A native of the Nile Delta, he became a Scribe of the Scroll (''Katib al-Darj''), or clerk of the Mamluk chancery in Cairo, Egypt. His magnum opus is the voluminous administrative encyclopedia ''Ṣubḥ al-Aʿshá''. ''Ṣubḥ al-aʿshā'' ''Ṣubḥ al-Aʿshá fī Ṣināʿat al-Inshāʾ'' ('The Dawn of the Blind' or 'Daybreak for the Night-Blind regarding the Composition of Chancery Documents'); a fourteen-volume encyclopedia completed in 1412, is an administrative manual on geography, political history, natural history, zoology, mineralogy, cosmography, and time measurement. Based on the ''Masālik al-abṣār fī mamālik al-amṣar'' of Shihab al-Umari Shihab al-Din Abu al-Abbas Ahmad Ibn Fadlallah al-Umari (), commonly k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Music Cipher
In cryptography, a music cipher is an algorithm for the encryption of a plaintext into musical symbols or sounds. Music-based ciphers are related to, but not the same as musical cryptograms. The latter were systems used by composers to create musical Subject (music), themes or motif (music), motifs to represent names based on similarities between letters of the alphabet and musical note names, such as the BACH motif, whereas music ciphers were systems typically used by cryptographers to hide or code, encode messages for reasons of secrecy or espionage. Types There are a variety of different types of music ciphers as distinguished by both the method of encryption and the musical symbols used. Regarding the former, most are simple substitution ciphers with a one-to-one correspondence between individual letters of the alphabet and a specific musical note. There are also historical music ciphers that utilize homophonic substitution (one-to-many), polyalphabetic substitution, polyphonic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1563 Books
Year 1563 ( MDLXIII) was a common year starting on Friday of the Julian calendar. Events January–March * January 2 (January 2, 1562 O.S., January 11, 1563 N.S.) – The convocation of bishops and clerics of the Church of England is opened at St Paul's Cathedral in London by the Dean of the Arches, Robert Weston to agree upon the wording of what will become the Thirty-nine Articles, with the assembly adopting all but three of the Forty-two Articles promulgated during the reign of King Edward VI in 1553. The conference lasts for three months before agreeing upon the Articles to be submitted for further modification. * January 25 – In Italy, Instituto Bancario San Paolo di Torino, a constituent of the major financial group Sanpaolo IMI, is founded. * February 1 – Sarsa Dengel succeeds his father Menas as Emperor of Ethiopia at age 14. * February 18 – Francis, Duke of Guise, is assassinated while besieging Orléans by Jean de Poltrot. * March 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptography Books
Cryptography, or cryptology (from "hidden, secret"; and ''graphein'', "to write", or ''-logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of adversarial behavior. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, information security, electrical engineering, digital signal processing, physics, and others. Core concepts related to information security ( data confidentiality, data integrity, authentication, and non-repudiation) are also central to cryptography. Practical applications of cryptography include electronic commerce, chip-based payment cards, digital currencies, computer passwords, and military communications. Cryptography prior to the modern age was effectively synonymous with encryption, converting read ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
