What is the difference between watermarking, steganography, and cryptography ?
Digital Watermarking World: FAQWhile cryptography is about protecting the content of messages (their meaning), steganography is about concealing their very existence. It comes from Greek roots, literally means 'covered writing', and is usually interpreted to mean hiding information in other information. Examples include sending a message to a spy by marking certain letters in a newspaper using invisible ink, and adding sub-perceptible echo at certain places in an audio recording.
Related QuestionsWhat is the difference between visible and invisible watermarking ?
Digital Watermarking World: FAQVisibility is a term associated with the perception of the human eye. A watermarked image in which the watermark is imperceptible, or the watermarked image is visually identical to its orginal constitutes a invisible watermarking. Examples include images distrubuted over internet with watermarks embedded in them for copyright protection. Those which fail can be classified as visible watermarks. Examples include logos used in papers in currencies.
Related QuestionsWhat is Cryptography?
Able Encryption Software. Safe Soft Corporation. Frequently ...Cryptography is the art and science of keeping files and messages secure. It works by mathematically transforming plaintext messages or files into a ciphertext, a process known as encryption.
Related QuestionsDigital Certificate Registration CenterCryptography is the science of enabling secure communications between a sender and one or more recipients. This is achieved by the sender scrambling a message (with a computer program and a secret key) and leaving the recipient to unscramble the message (with the same computer program and a key, which may or may not be the same as the sender's key). The emphasis of cryptography is on data confidentiality, data integrity, sender authentication, and non-repudiation of origin/data accountability.Related Questions
The National Committee for Voting Integrity (NCVI)Cryptography is the science of mathematical security. On modern computers, cryptography includes encryption, authentication, and integrity. A good introduction to the concepts can be found here:Related Questions
DCSSI FAQCryptography is a science intended to convert unencrypted information or signals into information or signals using secret conventions called keys, such that the information or signals are unintelligible to third parties who are not aware of the secret used to convert the signals, or to perform the reverse operation using hardware or software means designed for this purpose.Related Questions
Digital IdentityCryptography is the science of disguising information through encryption (scrambling) and restoring it to its original form through decryption. It provides similar, but much stronger, security assurances that signatures, paper envelopes and codebooks have always provided.Related Questions
Where can I learn more about cryptography?
DESCHALL Project Frequently Asked QuestionsThere are a few good resources available that should be able to help you better understand cryptography, regardless of your level of experience. Some of these can get quite technical, so if you're looking for a quicker introduction to some of the concepts and such, you'll probably want to grab the Snake Oil FAQ which was written to be understandable by an IS-type person without lots of background in mathematics or information security.
Related QuestionsWhat is Watermarking?
Surround FAQWatermarking is an embedded signal that applies a digital signature in the form of noise (supposedly inaudible) on a DVD-A. This digital watermark actually puts a faint image (either text or graphics) on the signal side of the disc which makes it extremely hard for pirates to duplicate. The watermark also identifies the artist, record company, catalog number and copyright holder. In some cases yes, in some cases no.
Related QuestionsWhat is encryption and cryptography?
JARING E-MALLEncryption is the transformation of data into a form (a cipher) that is, for most intents and purposes, impossible to read with out the appropriate decoder (a cryptographic key). Its purpose is to ensure privacy by keeping information hidden from anyone for whom it is not intended, even those who have access to the encrypted data. Decryption is the reverse of encryption; it is the transformation of encrypted data back into an intelligible form.
Related QuestionsChina Construction Bank (Macau)Encryption/Cryptography creates a secure environment for the information being transferred between your browser and China Construction Bank (Macau). Put simply, secure data such as your customer ID and Password are scrambled in our encryption/cryptography process to avoid disclosing your information by unauthorized persons.Related Questions
What is symmetric cryptography?
The National Committee for Voting Integrity (NCVI)Encryption uses a mathematical key to provide secrecy. Symmetric cryptography refers to encryption systems that use the same key to encrypt and decrypt. A longer explanation can be found here: There are many books that explain these concepts in more detail. We recommend Chapter XX of Secrets & Lies: Digital Security in a Networked World, by Bruce Schneier.
Related QuestionsWhat is watermarking? What is a digital watermark?
SDMI Challenge FAQA digital watermark is an imperceptible signal hidden in an audio clip, or an image, or any other object of value. The hidden signal is intended to communicate information about the marked object. There are many applications of watermarking. In the context of SDMI, the application is screening and piracy prevention: an audio clip with a watermark is recognized as copyrighted, warning a portable device that it should not be recorded (or possibly even played) except under specific conditions.
Related QuestionsWhat were the two non-watermarking challenges?
SDMI Challenge FAQWe will discuss these in detail in our upcoming technical report. Briefly, challenge D concerned a method for preventing people from ripping tracks from a CD, unless that CD has a signature on it marking the CD as original. Thus, as far as we can tell, this is intended to allow you to make mix CDs and MP3s from your original CDs, but not permit you to make mixes and MP3s from other mix CDs or pirated CDs.
Related QuestionsWhat is software watermarking?
Java and .NET Obfuscation Frequently Asked QuestionsSoftware watermarking is used to hide customer identification or copyright information within software applications, in the same fashion that digital content providers protect songs, movies and images. A watermark is used to identify owners of the software or to stealthily identify the origin of a pirated copy. TOP
Related QuestionsWhat is video watermarking ?
Digital Watermarking World: FAQA very simple defintion of video watermarking would be, ''The process of watermarking the sequence of video frames''. There are several avenues in case of video to watermark. One can watermark the raw frame data, or the compressed data, where watermarking the later is more challenging.
Related QuestionsWhat is audio watermarking ?
Digital Watermarking World: FAQAudio, like any other data, constitutes a carrier for physo-acoustically hidden data. Thus the process of embedding information into audio can be termed as audio watermarking.
Related QuestionsWhat is text watermarking ?
Digital Watermarking World: FAQWatermarking Document Images with Bounding Box Expansion'', Jack Brassil and Larry O'Gorman Information Hiding 1st International Workshop, June 1996 Marking and Detection of Text Documents Using Transform-domain Techniques'', Yong Liu, Jonathon, Edward Wong, Steven Low Security and watermarking of Multimedia Contents, january 1999 Document Image Data Hiding Technique Using Character Spacing With Sequence Coding'', Nopporn Chotikakamthorn ICIP'99
Related QuestionsWhat is digital watermarking?
Frequently Asked Questions | Digital Watermarking AllianceDigital watermarking is the process by which identifying data is woven into media content such as images, movies, music or programming, giving those objects a unique, digital identity that can be used for a variety of valuable applications.
Related QuestionsWhat is cryptology? Cryptography? Plaintext? Ciphertext? Encryption? Key?
Cryptography FAQs - WikiFAQ - Answers to Frequently Asked Qu...The story begins: When Julius Caesar sent messages to his trusted acquaintances, he didn't trust the messengers. So he replaced every A by a D, every B by a E, and so on through the alphabet. Only someone who knew the ''shift by 3 rule could decipher his messages. A cryptosystem or cipher system is a method of disguising messages so that only certain people can see through the disguise. Cryptography is the art of creating and using cryptosystems.
Related Questionsc) What is secret key cryptography?
Digital Signature IndiaSecret-key cryptography is sometimes referred to as symmetric cryptography. It is the more traditional form of cryptography, in which a single key can be used to encrypt and decrypt a message. Secret-key cryptography not only deals with encryption, but it also deals with authentication.
Related Questionsd) What is Public Key Cryptography?
Digital Signature IndiaPublic Key Cryptography is a method for securely exchanging messages, based on assigning two complimentary keys (one public, one private) to the individuals involved in a transaction. Public Key Cryptography is based on the science of encryption, the mathematical scrambling and unscrambling of messages.
Related QuestionsWhat is Server Gated Cryptography (SGC)?
SSL Certificate FAQs - SSL and HTTPS BasicsU.S. government restrictions on U.S. vendors prevented the export of "strong" cryptography several years ago. As a result, many people purchased computers or downloaded export version browsers supporting only 40- or 56-bit SSL encryption. Microsoft developed "Server Gated Cryptography" ("SGC") and Netscape developed "step-up" technology to enable 128-bit SSL encryption with export versions of browsers.
Related QuestionsHow can I learn more about Cryptography on the Internet?
RXN Communications FAQ - InternetCryptography has many applications on the internet today, from the protection of documents to the securing of online transactions. The following sites offer additional information: Handbook of Applied Cryptography
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