Digital Fingerprint (other)

	Digital Fingerprint (other) Digital fingerprint may refer to: * Message digest, the output of a one-way function when applied to a stream of data ** Public key fingerprint, short sequence of bytes used to identify a longer public key * Fingerprint (computing) Acoustic fingerprint, a condensed digital summary generated from an audio signal Device fingerprint, a compact summary of software and hardware settings collected from a remote device, for example a computer or a web browser Digital video fingerprinting, a technique to summarize characteristic components of a video recording TCP/IP stack fingerprinting, the remote detection of the characteristics of a TCP/IP stack Content ID (algorithm) Content ID is a digital Fingerprint (computing), fingerprinting system developed by Google which is used to easily identify and manage copyrighted content on YouTube. Videos uploaded to YouTube are similarity measure, compared against audio and v ... , a Google technology used on YouTube to identify c ... [...More Info...] [...Related Items...] OR:** [Wikipedia] [Google] [Baidu]
	Message Digest A cryptographic hash function (CHF) is a hash algorithm (a map of an arbitrary binary string to a binary string with fixed size of n bits) that has special properties desirable for cryptography: * the probability of a particular n-bit output result (hash value) for a random input string ("message") is 2^ (like for any good hash), so the hash value can be used as a representative of the message; * finding an input string that matches a given hash value (a ''pre-image'') is unfeasible, unless the value is selected from a known pre-calculated dictionary (" rainbow table"). The ''resistance'' to such search is quantified as security strength, a cryptographic hash with n bits of hash value is expected to have a ''preimage resistance'' strength of n bits. A ''second preimage'' resistance strength, with the same expectations, refers to a similar problem of finding a second message that matches the given hash value when one message is already known; * finding any pair of different messa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Public Key Fingerprint In public-key cryptography, a public key fingerprint is a short sequence of bytes used to identify a longer public key. Fingerprints are created by applying a cryptographic hash function to a public key. Since fingerprints are shorter than the keys they refer to, they can be used to simplify certain key management tasks. In Microsoft software, "thumbprint" is used instead of "fingerprint." Creating public key fingerprints A public key fingerprint is typically created through the following steps: # A public key (and optionally some additional data) is encoded into a sequence of bytes. To ensure that the same fingerprint can be recreated later, the encoding must be deterministic, and any additional data must be exchanged and stored alongside the public key. The additional data is typically information which anyone using the public key should be aware of. Examples of additional data include: which protocol versions the key should be used with (in the case of PGP fingerprints); ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Fingerprint (computing) In computer science, a fingerprinting algorithm is a procedure that maps an arbitrarily large data item (such as a computer file) to a much shorter bit string, its fingerprint, that uniquely identifies the original data for all practical purposesA. Z. Broder. Some applications of Rabin's fingerprinting method. In Sequences II: Methods in Communications, Security, and Computer Science, pages 143--152. Springer-Verlag, 1993 just as human fingerprints uniquely identify people for practical purposes. This fingerprint may be used for data deduplication purposes. This is also referred to as file fingerprinting, data fingerprinting, or structured data fingerprinting. Fingerprints are typically used to avoid the comparison and transmission of bulky data. For instance, a web browser or proxy server can efficiently check whether a remote file has been modified, by fetching only its fingerprint and comparing it with that of the previously fetched copy.Detecting duplicate and near-duplicate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Acoustic Fingerprint An acoustic fingerprint is a condensed digital summary, a fingerprint, deterministically generated from an audio signal, that can be used to identify an audio sample or quickly locate similar items in an audio database. Practical uses of acoustic fingerprinting include identifying songs, melodies, tunes, or advertisements; sound effect library management; and video file identification. Media identification using acoustic fingerprints can be used to monitor the use of specific musical works and performances on radio broadcast, records, CDs, streaming media and peer-to-peer networks. This identification has been used in copyright compliance, licensing, and other monetization schemes. Attributes A robust acoustic fingerprint algorithm must take into account the perceptual characteristics of the audio. If two files sound alike to the human ear, their acoustic fingerprints should match, even if their binary representations are quite different. Acoustic fingerprints are not h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Device Fingerprint A device fingerprint or machine fingerprint is information collected about the software and hardware of a remote computing device for the purpose of identification. The information is usually assimilated into a brief identifier using a fingerprinting algorithm. A browser fingerprint is information collected specifically by interaction with the web browser of the device. Device fingerprints can be used to fully or partially identify individual devices even when persistent cookies (and zombie cookies) cannot be read or stored in the browser, the client IP address is hidden, or one switches to another browser on the same device. This may allow a service provider to detect and prevent identity theft and credit card fraud, but also to compile long-term records of individuals' browsing histories (and deliver targeted advertising or targeted exploits) even when they are attempting to avoid tracking – raising a major concern for internet privacy advocates. History Basic web browser c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Digital Video Fingerprinting Video fingerprinting or video hashing are a class of dimension reduction techniques in which a system identifies, extracts, and then summarizes characteristic components of a video as a unique or a set of multiple perceptual hashes, enabling that video to be uniquely identified. This technology has proven to be effective at searching and comparing video files. History and process Video fingerprinting was first developed into practical use by Philips in 2002.Oostveen, J., Kalker, T., & Haitsma, J. (2002, March). Feature extraction and a database strategy for video fingerprinting. In ''International Conference on Advances in Visual Information Systems'' (pp. 117-128). Springer, Berlin, Heidelberg. Different methods exist for video fingerprinting. Van Oostveen relied on changes in patterns of image intensity over successive video frames. This makes the video fingerprinting robust against limited changes in color - or the transformation of color into gray scale of the original video ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	TCP/IP Stack Fingerprinting TCP/IP stack fingerprinting is the remote detection of the characteristics of a TCP/IP stack implementation. The combination of parameters may then be used to infer the remote machine's operating system (aka, OS fingerprinting), or incorporated into a device fingerprint. TCP/IP Fingerprint Specifics Certain parameters within the TCP protocol definition are left up to the implementation. Different operating systems, and different versions of the same operating system, set different defaults for these values. By collecting and examining these values, one may differentiate among various operating systems, and implementations of TCP/IP. The TCP/IP fields that may vary include the following: * Initial packet size (16 bits) * Initial TTL (8 bits) * Window size (16 bits) * Max segment size (16 bits) * Window scaling value (8 bits) * "don't fragment" flag (1 bit) * "sackOK" flag (1 bit) * "nop" flag (1 bit) These values may be combined to form a 67-bit signature, or fingerprint, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]