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| | Cryptanalysis |
 | | In industry, too, ciphers are not free from flaws: for example, the A5/1, A5/2 and CMEA algorithms, used in mobile phone technology, can all be broken in hours, minutes or even in real-time using widely-available computing equipment. | | | In academia, new designs are regularly presented, and are also frequently broken: the 1984 block cipher Madryga was found to be susceptible to ciphertext-only attacks in 1998; FEAL-4, proposed as a replacement for the DES standard encryption algorithm, was demolished by a spate of attacks from the academic community, many of which are entirely practical. | | | Distinguishing algorithm — the attacker can distinguish the cipher from a random permutation. |
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http://hallencyclopedia.com/Cryptanalysis
(2474 words)
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| | [No title] |
| | Block Encryption Variable Length (BEVL) encoding, embodying the invention and to be described herein, overcomes the identified weaknesses of the CMEA algorithm. | | | Therefore, in CMEA, even if the CAVE table, which is not a permutation, were to be replaced with a table which is a permutation, the output of tbox () still would not be a permutation. | | | CMEA has been published on the Internet, hence these weaknesses are open for discovery by anyone with an interest in doing so. |
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http://www.wipo.int/cgi-pct/guest/getbykey5?KEY=98/40984.980917&ELEMENT_SET=DECL
(5362 words)
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| | Cryptanalysis of the Cellular Message Encryption Algorithm |
| | CMEA is quite simple, and appears to be optimized for 8-bit microprocessors with severe resource limitations. | | | This paper analyzes the Telecommunications Industry Association's Cellular Message Encryption Algorithm (CMEA), which is used for confidentiality of the control channel in the most recent American digital cellular telephony systems. | | | Therefore, 3-byte blocks are a good indicator of the strength of CMEA as used in phone systems; by giving a known-plaintext attack on CMEA with 3-byte blocks, we show that the control channel is not protected adequately in nearly all of the North American digital cellular phone systems. |
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http://www.cs.berkeley.edu/~daw/papers/cmea-crypto97-www/paper10.html
(4189 words)
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| | [No title] |
| | The first and second offsets are applied to the inputs to the tbox function during a first iteration of the CMEA process, and the third and fourth offsets are applied to the inputs to the tbox function during a second iteration of the CMEA process. | | | Once the table is generated, octets of the key are applied to octets of a message according to an algorithm described below, and the resulting value is used as an index to the lookup table. | | | The CMEA algorithm of the prior art may be significantly improved as described in greater detail below. |
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http://www.wipo.int/cgi-pct/guest/getbykey5?KEY=99/03246.990121&ELEMENT_SET=DECL
(4533 words)
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| | Wired News: Digital Cell Phone Crypto Cracked |
| | Unfortunately, the TIA created a poor algorithm, and thousands of digital cellular users are now using it. | | | However, flaws in the CMEA algorithm allow an attacker to predict portions of the key, reducing the effective key length to 24 or 32 bits, significantly shorter than the weak cryptography the US government allows for export. | | | Note: You are reading this message either because you can not see our css files (served from Lygo, a Lycos image server, for performance reasons), or because you do not have a standards-compliant browser. |
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http://www.wired.com/news/technology/0,1282,2676,00.html
(821 words)
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| | TR45.3 |
| | Thc CMEA key is used with the CMEA algorithm for protection of digital data exchanged between the mobile station and the base station. | | | The CAVE algorithm has been confidential to the industries, and was developed under the auspices of the NSA (see Barlow and Gilmore below). | | | §2.7 describes the ORYX algorithm and procedures for key and mask generation for encryption and decryption in cellular data services. |
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http://cryptome.sabotage.org/tr453.htm
(1517 words)
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| | The Politics of Encryption |
| | In their draft report Cryptanalysis of the Cellular Message Encryption Algorithm they revealed several weaknesses and proposed an attack that can be carried out on currently-available computers in a matter of minutes, or at most hours. | | | As early as 1992 this method was known to be cryptographically weak and could be compromised with commercially available computing equipment and custom code-breaking software. | | | Nonetheless, new encoding techniques had been perfected over the past couple of decades, and military-strength encryption was not only possible, but was being used by thousands of people on the Internet through such software programs as Pretty Good Privacy (PGP). |
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http://www.decodesystems.com/mt/97jun
(1419 words)
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| | [No title] |
| | The Internet and Intranets The age of the Information Superhighway—the Internet— spawned an entire generation of hackers, crackers, sniffers, and spoofers.38 The development of the personal computer and high-speed modems39 resulted in the linking of computer networks around the world to form the Internet. | | | To evaluate the impact of emerging technologies on the expectation of privacy required by the attorney-client privilege, courts should adapt their analyses to modern technological realities. | | | PCS is currently the most advanced cellular technology. |
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http://stlr.stanford.edu/STLR/Articles/97_STLR_3/Article_txt.txt
(5140 words)
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| | Crackers & Hackers - 3/31/1997 - Wireless Week - CA5034 |
| | New and stronger versions of wireless algorithms will replace those that are broken. | | | Counterpane President Bruce Schneier said the algorithm, developed by a working group of the Telecommunications Industry Association, was "done in secret. | | | Two weeks ago, Minneapolis-based cryptographic and computer security consulting firm Counterpane Systems said it and University of California-Berkeley researchers had "discovered a flaw in the privacy protection" of the cellular message encryption algorithm. |
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http://www.wirelessweek.com/article/CA5034.html?spacedesc=
(545 words)
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| | THE WORLD QUESTION CENTER 2005 |
| | The implementation of a specific algorithm may be boring, a task best left to a machine, while the construction of the algorithm together with a rigorous proof that it works is a creative and often laborious enterprise. | | | By now the concept of an algorithm, well- defined, is widely hailed as the way to solve problems, more precisely sequences of problems labeled by a numerical parameter. | | | In other words the message may be wrong, but it won't be wrong because of the encryption and it is easily fixed. |
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http://www.edge.org/q2005/q05_3.html
(4621 words)
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| | Kremlin for Windows Support FAQ. Kremlin Encrypt Security Software: Encrypt and Protect Your Files, Folders, Emails, ... |
| | The encryption used in Kremlin is extremely secure, and it would require several months of processing by several thousand computers to break even the least secure algorithm (NewDES). | | | Hall has discovered several security flaws in the X-Windows operating system, helped to break the Cellular message encryption algorithm, and contributed to numerous papers on cryptographic algorithms and protocols. | | | Note that we have no idea if the US government or any other organization has a top-secret encryption-breaking machine, but because Kremlin uses the most advanced and secure technology in the encryption field, it will be one of the last encryption programs to be broken by this "encryption-breaking machine". |
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http://www.kremlinencrypt.com/FAQ.htm
(1091 words)
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| | WSP: Wireless Security Perspectives, Monthly Technical Bulletin |
| | GSM has developed a new, higher security algorithm for encryption of traffic, based on work on 3G security. | | | Many security algorithms rely on the difficulty of factoring multiples of large prime numbers. | | | Recent Cryptanalysis of GSM A5/1 Algorithm: What Does it Mean?. |
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http://www.cnp-wireless.com/wsp.html
(4321 words)
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| | [No title] |
| | As we understand the researchers' claim, it appears that the algorithm selected and the way it was implemented in the system has led to the stated flaws. | | | And it's still true that digital cellular systems are much harder to casually eavesdrop on than analog phones. | | | This in itself isn't necessarily a > problem, said David Wagner, a professor of computer science at the > University of California-Berkeley, but GSM also does not > authenticate its > base stations, the hardware that communicates with the > handsets -- and that > is potentially troublesome. |
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http://www.tscm.com/tscm-l/051402.txt
(17450 words)
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| | [No title] |
| | Strong, modern encryption algorithms have been published worldwide since the 1970s. | | | In my written testimony is an abstract of a new paper being released today by Wagner, Schneier and Kelsey describing how to break the Cellular Message Encryption Algorithm in minutes to hours on a single computer. | | | Digital cell phones are still much harder to intercept than regular analog ones, but they are not nearly as secure as they could have been or as we thought they were. |
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http://people.qualcomm.com/karn/export/houseoral.html
(585 words)
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| | Information Security - General Information |
| | This algorithm is cryptographically weak, and it is not difficult to break the algorithm and clone GSM digital phones. | | | Schneier says, ``These algorithms were developed in secret, and were never published. | | | A5/2, the weaker of the two voice-encryption algorithms |
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http://www.cromwell-intl.com/security/security-generalinfo.html
(4770 words)
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| | CMEA - Wikipedia, the free encyclopedia |
| | The Cellular Message Encryption Algorithm, a block cipher. | | | This article consisting of a 4-letter acronym or initialism is a disambiguation page — a list of pages that otherwise might share the same title. |
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http://en.wikipedia.org/wiki/CMEA
(82 words)
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| | Citicomm Wireless, Inc. - Nextel iDEN Technology. |
| | In March 1997, researchers were able to break the Cellular Message Encryption Algorithm (CMEA) which is used to encode the digits that are depressed on a key pad by a user. | | | The break does show that with enough time, resources and computing power an encrypted code can be broken since it is based on mathematics. | | | The iDEN system is designed to meet the needs of a new generation of customers who require the integration of multiple services on a single business communication system, and the quality and flexibility of advanced digital communications. |
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http://www.citicomm.net/nextel/digitalsecurity.html
(603 words)
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| | InternetWeek The Business and Technology of the Internet http://internetweek.cmp.com |
| | The three reporte d their findings in a research paper titled "Cryptanalysis of the Cellular Message Encryption Algorithm," which scrutinizes the Cellular Message Encryption Algorithm (CMEA) created by the Telecommunications Industry Association. | | | Schneier and Counterpane cryptographer John Kelsey, along with University of California at Berkeley graduate student David Wagner, have proved on paper that a digital break-in of a cellular phone can be carried out in a few minutes with software on a conventional PC. | | | CMEA is the cipher used for safeguarding the control channel in most U.S. digital cellular systems. |
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http://www.internetweek.com/telepath/08new7.htm
(422 words)
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| | Index of Crypto Papers Available Online |
| | A new polynomial factorization algorithm and its implementation | | | , Fast Software Encryption: Designing Encryption Algorithms for Optimal Software Speed on the Intel Pentium Processor, Fast Software Encryption, Fourth International Workshop Proceedings (January 1997), Springer-Verlag, 1997, pp. | | | , A New Algorithm for the Recognition of Series Parallel Graphs; Report CS-R9504, Centrum voor Wiskunde en Informatica (CWI), January 1995. |
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http://www.schneier.com/biblio/all-authors-S.html
(4763 words)
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| | AntiOnline - Cellphones |
| | CAVE and CMEA are documented in Common Cryptographic Algorithms and Interface Specification for Common Cryptographic Algorithms. | | | David Wagner, Bruce Schneier and John Kelsey published Cryptanalysis of the Cellular Message Encryption Algorithm, which documents deep flaws in the CMEA algorithm.(http://www.schneier.com/paper-cmea.pdf) | | | FDMA:FDMA or Frequency Division Multiple Access is an old out of date system which sends analog signals to transmit information.It was obviated as analog signals could be easily tapped into and they required more power.Each call made had to be made on a different frequency. |
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http://www.antionline.com/printthread.php?threadid=258166&pagenumber=1
(994 words)
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| | NO MORE SECRETS Researchers find digital wireless technology is not secure |
| | Carriers deploying European-bred GSM quickly pointed out that the study does not apply to their technology's encryption algorithms. | | | "We could have chosen a more robust algorithm, but we couldn't export it. | | | The researchers sought to show the vulnerability of the cellular message encryption algorithm (CMEA) used to code signaling data for wireless transmission-information such as personal identification numbers and credit card data. |
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http://telephonyonline.com/mag/telecom_no_secrets_researchers/index.html
(612 words)
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| | TIA 1998 STAR: TR-45 Mobile and Personal Communications Systems |
| | The TR-45 Ad Hoc Authentication Group (AHAG) completed and approved for TIA consideration the Common Cryptographic Algorithms (CCA) document, which addresses near-term enhancements to encryption algorithms. | | | The Subcommittee completed its work to standardize Cellular Digital Packet Data (CDPD), having published more than 60 CDPD-related documents (IS-732, Cellular Digital Packet Data, in more than 40 parts, and TSB-87, Cellular Digital Packet Data System Specification, in more than 20 parts). | | | A new work program specific to the standardization of CDPD system enhancements is under way in TR-45.6. |
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http://www.tiaonline.org/standards/star/98/tr45.cfm?print=&dhtml=on
(1824 words)
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| | CRYPTO '97 Accepted Submissions |
| | A Multiplicative Attack Using LLL Algorithm on RSA Signatures with Redundancy (Jean-Francois Misarsky) | | | Cryptanalysis of the Cellular Message Encryption Algorithm (Bruce Schneier, David Wagner, John Kelsey) | | | Efficient Algorithms for Elliptic Curve Cryptosystems (Jorge Guajardo and Christof Paar) |
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http://www.iacr.org/conferences/c97/accepted.html
(430 words)
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| | LISTWATCH: Security List Items |
| | Counterpane Systems and UC Berkeley announced that researchers have discovered a flaw in the privacy protection of the Cellular Message Encryption Algorithm (CMEA), used in today's most advanced digital cellular phones. | | | One concern is that anonymous remailers and fully anonymous digital cash might be export-restricted under the exception for hardware and software intentionally used to evade US law or taxes. | | | Although CMEA is a 64-bit symmetric cipher, flaws reduce the key length to 24 or 32 bits. |
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http://www.ieee-security.org/Cipher/Newsbriefs/1997/970322.LISTWATCH.html
(627 words)
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| | Weakness |
| | Burnt Toad/AK Technology services is a nonexistant organization, who's main purpose is to research software flaws,especially when it comes to security, and inform the general public about the flaws so they can better know how things work(or don't know work), and if needed, to fix it. | | | Our main research is geared towards system security research, data compression, encryption, and manipulation to produce informative documentation and useful software." | | | Our goal is to provide support, resources, and a way to publish individual’s productions with the benefit of being recognized by an entity of integrity. |
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http://users.castel.nl/~groor01/weak.htm
(295 words)
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| | Security Library :: Cryptography |
| | Fast Software Encryption: Designing Encryption Algorithms for Optimal Software Speed on the Intel Pentium Processor | | | Date - May 21, 2003 Author - ABI- Software Development | | | The Security of the Cipher Block Chaining Message Authentication Code. |
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http://www.windowsecurity.com/pages/larticle.asp?type=WHP&id=24
(1317 words)
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| | Signaling message encryption |
| | The SME encryption algorithm (called Cellular Message Encryption Algorithm, or CMEA) has already been broken; another one for the cryptographers! | | | AC (or VLR if SSD is shared) uses SSD_B and the CAVE algorithm to generate an encryption mask (SME key) | | | SME key is used by MS and BS to encrypt certain signaling information sent over the analog voice channel or digital traffic channel during call (e.g., a subscriber-entered PIN or credit card number) |
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http://www.wca.org/synacom/tsld014.htm
(94 words)
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| | [No title] |
| | Somewhere there is a file telling how to do it... | | | I write to request a copy of all agency records or portions thereof, in electronic or other form, which pertain, relate, or refer to encryption for cellular telephone communications. | | | As you know, the FOIA provides that an agency must make an initial determination of whether to comply with a FOIA request within ten working days of receiving the request. |
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http://www.textfiles.com/magazines/SURFPUNK/surf0101.txt
(2605 words)
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| | Cellular Message Encryption Algorithm - Wikipedia, the free encyclopedia |
| | Some accusations were made that the NSA had pressured the original designers into crippling CMEA, but the NSA has denied any role in the design or selection of the algorithm. | | | CMEA is one of four cryptographic primitives specified in a Telecommuncations Industry Association (TIA) standard, and is designed to encrypt the control channel, rather than the voice data. | | | In cryptography, the Cellular Message Encryption Algorithm (CMEA) is a block cipher which was used for securing mobile phones in the United States. |
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http://en.wikipedia.org/wiki/Cellular_Message_Encryption_Algorithm
(161 words)
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| | Encryption |
| | Encryption is used in communications systems to protect information being transmitted over a channel from being intercepted and read by unauthorised parties. | | | uses the the Cellular Message Encryption Algorithm (CMEA). | | | The confidentiality of transmitted data is also enhanced by the use of CDMA, which hinders attempts at interception. |
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http://www.argospress.com/Resources/cdma-mobile/cdmencrip.htm
(197 words)
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| | QUALCOMM Press Center - QUALCOMM Responds to Digital Security Issues |
| | Any one of more than 4.4 trillion codes are utilizedduring the scrambling process. | | | "Yesterday's announcement on digital cellular security underscores the needto provide consumers with enhanced security and privacy, which are thehallmarks of our Code Division Multiple Access (CDMA) digital technology.QUALCOMM's CDMA technology continues to successfully provide a very highlevel of protection from cloning and eavesdropping. | | | Voice privacy and cloning protection providedby QUALCOMM's CDMA technology are not affected by the security issuessurrounding the Cellular Message Encryption Algorithm (CMEA), and thereforechanges to CDMA networks and wireless phones are unnecessary. |
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http://www.qualcomm.com/press/releases/1997/press874.html
(320 words)
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| | Janne - OH2MKQ: Links/Telecommunication/Cellular |
| | The new Nokia Cellular Data Suite is piece of software you put into to your Win95 PC and you can use Nokia Phones (like 8110) only with serial cable to do data communications, Fax, SMS and other applications. | | | Cracking the Cellular Message Encryption Algorithm (CMEA) (4.5.1997) | | | I wouldn't be surprised if the NSA and its "ECHELON" project (more information how they are spying you right now) DO have methods to break GSM encryption -in fact, I'd be surprised if they had not.. |
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http://www.helsinki.fi/~jhukkine/l-cellul.html
(271 words)
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| | digital certificate definition of digital certificate in computing dictionary - by the Free Online Dictionary, ... |
| | The certificate is typically combined with a signed message or signed executable file, and the public key is used to verify the signatures (see digital signature and code signing). | | | The digital equivalent of an ID card used in conjunction with a public key encryption system. | | | Version number of certificate format Serial number (unique number from CA) Certificate signature algorithm Issuer (name of CA) Valid-from/valid-to dates Subject (name of company or person certified) Subject's public key and algorithm Digital signature created with CA's private key |
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http://computing-dictionary.thefreedictionary.com/digital+certificate
(474 words)
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| | The page cannot be found |
| | Go to Microsoft Product Support Services and perform a title search for the words HTTP and 404. | | | Open IIS Help, which is accessible in IIS Manager (inetmgr), and search for topics titled Web Site Setup, Common Administrative Tasks, and About Custom Error Messages. |
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http://www.absoluteastronomy.com/encyclopedia/c/ce/cellular_message_encrypti...
(121 words)
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| | Detours on the Information Superhighway: |
| | These protocols utilize hash codes-a digital fingerprint-to authenticate messages and | | | standards agencies have developed five e-mail encryption protocols, or | | | circuitous route Internet e-mail messages sometimes take after the |
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http://stlr.stanford.edu/STLR/Articles/97_STLR_3/article.htm
(499 words)
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| | [No title] |
| | $key = q/0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0/; $section_info{$key} = '0%:%paper10.html%:%Cryptanalysis of the Cellular Message Encryption Algorithm' unless ($section_info{$key}); $done{"paper10.html"} = 1; 1; |
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http://www.cs.berkeley.edu/~daw/papers/cmea-crypto97-www/sections.pl
(51 words)
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| | List of cryptography topics |
| | ECHELON -- Edward Hebern -- EFF DES cracker -- Electronic money -- Electronic signature -- Electronic voting -- ElGamal discrete log cryptosystem -- Eli Biham -- Elizebeth Friedman -- Elliptic curve cryptography -- Elliptic Curve DSA -- Encryption -- Enigma machine -- Enigmail -- Étienne Bazeries -- Export of cryptography -- | | | Garble -- Gardening (cryptanalysis) -- GDES -- Geheimfernschreiber -- Gilbert Vernam -- Glossary of telecommunications encryption terms -- GMR -- GNU Privacy Guard -- GOST -- Government Communications Headquarters -- Great Cypher -- |
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http://www.sciencedaily.com/encyclopedia/list_of_cryptography_topics
(632 words)
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| | [No title] |
| | Tradeoff: number of XOR gates vs. statistical properties. | | | . ¨ GSM Voice Security Continued Ô A 5 / 2 i s a l g o r i t h m f o r w e a k v o i c e c r y p t o . D e v e l o p e d i n s e c r e t w i t h h e a v y i n p u t b y i n t e l l i g e n c e a g e n c i e s t o e n s u r e b r e a k a b i l i t y . B e t w e e n 0 a n d 1 6 - b i t E f f e c t i v e s e c u r i t y . C a n b e b r o k e n i n r e a l t i m e . A s f e w a s 5 c l o c k c y c l e s t o b r e a k . ¡$ ¬ ? ¬ ? ª u j ó L | | | ¡Z ó G 7 ¨ Bluetooth Encryption ¨ 4 LFSRs of length 25, 31, 33, 39. |
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http://www.ece.wpi.edu/~sunar/ee579r/wireless.ppt
(709 words)
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| | cns05 class 13 |
| | tinysec lightweight link encryption for wireless sensors (skipjack cbc-mac) |
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http://www.cs.utk.edu/~dunigan/cs594-cns00/class13.html
(144 words)
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