confidentiality using symmetric encryption

... F(Li, Ki) Chuẩn mã hóa liệu  DES (Data Encryption Standard) công nhận chuẩn năm 1977  Phương thức mã hóa sử dụng rộng rãi  Tên giải thuật DEA (Data Encryption Algorithm)  Là biến thể hệ mã ... tương ứng • Kiểm tra lại với cặp (p, C) mới; OK K1 K2 khóa Chuẩn mã hóa tiên tiến  AES (Advanced Encryption Standard) công nhận chuẩn năm 2001  Tên giải thuật Rijndael (Rijmen + Daemen)  An ninh ... theo hệ Feistel o Không chia khối làm đôi Các hệ mã hóa khối khác (1)  IDEA (International Data Encryption Algorithm) o Khối 64 bit, khóa 128 bit, vòng o Theo cấu trúc mạng S-P, không theo hệ...

Ngày tải lên: 15/03/2014, 16:20

... candidates are discovered using meta-patterns of high frequency and content words, and symmetric patterns are discovered using simple graph-theoretic measures Categories are generated using a novel graph ... entities of a particular kind, as done in (Freitag, 2004) using coclustering Many Information Extraction papers discover relationships between words using syntactic patterns (Riloff and Jones, 1999) ... (Riloff and Jones, 1999) (Widdows and Dorow, 2002; Dorow et al, 2005) discover categories using two hard-coded symmetric patterns, and are thus the closest to us They also introduce an elegant graph...

Ngày tải lên: 23/03/2014, 18:20

... Conventional Encryption Principles Conventional Encryption Algorithms Cipher Block Modes of Operation Location of Encryption Devices Key Distribution Henric Johnson Conventional Encryption Principles ... = Plaintext EK[X] = encryption of X using key K DK[Y] = decryption of Y using key K • Effective key length of 168 bits Henric Johnson 15 Triple DEA Henric Johnson 16 Other Symmetric Block Ciphers ... Henric Johnson 20 Location of Encryption Device • Link encryption: – A lot of encryption devices – High level of security – Decrypt each packet at every switch • End-to-end encryption – The source...

Ngày tải lên: 29/03/2014, 16:20

... 1 USE OF MODERN BLOCK CIPHERS Symmetric- key encipherment can be done using modern block ciphers Modes of operation have been devised to encipher ... function inserts 0’s USE OF MODERN BLOCK CIPHERS Encryption in cipher feedback (CFB) mode In CFB mode, encipherment and decipherment use the encryption function of the underlying block cipher ... (shifted)? Encryption/ Decryption The bit streams created from the key generator are buffered to form a 228bit key that is exclusive-ored with the plaintext frame to create the ciphertext frame Encryption/ decryption...

Ngày tải lên: 11/07/2014, 11:52

... encode the other half, with the aid of the particular stage subkey Therefore, by using the subkeys in reverse order, the encryption process can be reversed This is really the reason that one half-word ... PIC17C42 IMPLEMENTATION OF DES CPU processing is required to generate the encryption key into the DES subkeys The 64-bit encryption key is reduced to 56-bits, by ignoring every eighth bit, usually ... and Ri of each stage are computed from Li-1 and Ri-1, and a subkey Ki that is generated from the encryption key In other words a round of the DES can be shown as: The six input bits specify an...

Ngày tải lên: 11/01/2016, 11:52

... Recovering Mailbox User Using Dial-Tone Recovery of 26 http://msopenlab.com/index.php?option=com_content&view=article&id= ... Restore, chọn Back up files and setting, sau nhấn Next 6/17/2011 1:47 PM Recovering Mailbox User Using Dial-Tone Recovery of 26 http://msopenlab.com/index.php?option=com_content&view=article&id= ... đánh dấu chọn vào First Storage Group, sau nhấn Next 6/17/2011 1:47 PM Recovering Mailbox User Using Dial-Tone Recovery of 26 http://msopenlab.com/index.php?option=com_content&view=article&id=...

Ngày tải lên: 14/08/2012, 08:51

... Between Documents ■ Chapter Creating Java Files ■ Using File Templates ■ Using GUI Templates Configuring the Editor Creating and Editing Files 21 Using NetBeansTM 5.0 IDE Creating Java Files NetBeans ... template in the New File wizard Using GUI Templates If you want to visually edit a Java GUI form using the IDE's GUI Builder, you have to create the form's source file using the IDE's Java GUI Forms ... sources, built using your own Ant build script Free-form project icon Web Project with Existing Ant Script Template for creating a web project based on your own web and Java sources, built using your...

Ngày tải lên: 17/08/2012, 09:18

... WS-Security using WSE 2.0 • Overview of digital signatures and encryption, and how to implement using different security tokens, including X.509 digital certificates • How to prevent replay attacks using ... how to rethink your approach to Web services development using today’s best tools and industrystandard specifications The book was written using prerelease copies of WSE that were released after ... that communicate using SOAP over HTTP xix 3901fm_final.qxd 6/30/04 2:50 PM Page xx Introduction WS-Secure Conversation: Establishes session-oriented trusted communication sessions using security...

Ngày tải lên: 20/08/2012, 13:59

Ngày tải lên: 03/09/2012, 15:54

... Standard, Triple Data Encryption Standard, Advanced Encryption Standard, Rivest Cipher, International Data Encryption Algorithm, and Blowfish • Disadvantages of symmetric encryption relate to ... symmetric cryptography is that encryption and decryption using a private key is usually fast and easy to implement • A digital signature solves the problem of authenticating the sender when using ... encryption relate to the difficulties of managing the private key Asymmetric Cryptography Strengths and Vulnerabilities • With asymmetric encryption, two keys are used instead of one – The private key...

Ngày tải lên: 17/09/2012, 10:43

Ngày tải lên: 19/09/2012, 09:21

... Experimental procedure Red mud was obtained from a bauxite ore refinery in Guinea It was analyzed using Emission Spectral Analyser PGS-2 Q24 Carl Zeiss Jena, Atomic Absorption Spectrometer Perkin ... 73 83 89 83 77 l0 15 20 25 82 88 91 89 contact time was varied from to 24 h at continuous mixing using a magnet stirrer The treated mud was separated from the acid suspension, washed with distilled ... importance of the preliminary acid treatment of the red mud was established by parallel experiments using both raw and activated red mud In Fig the results are compared for OPh-solution, and in Fig...

Ngày tải lên: 23/09/2012, 14:47

... of three physicians achieved consensus on whether the outcome was a result of medical management using a previously derived and widely accepted review process [19-24] If so, the case was considered ... studied factors We compared the distribution of these factors by preventable adverse event status using the chi-square statistic for categorical variables and the Wilcoxon rank-sum test for continuous ... responses to critical patients as the most common cause of preventable adverse events Our hospital is using this information to guide quality improvement strategies Our program cost very little to implement...

Ngày tải lên: 25/10/2012, 10:06

... adhesions may be avoided following thoracotomy by using a hyaluronate-based absorbable membran in rats [6] Also, Getman et al achieved the same effect by using haemostatic membrane [7] The present study ... the Experimental Animals Laboratory of Dokuz Eylul University Faculty of Medicine The purpose of using rats is easy availability, safety, and the high ratio of repeating the experiment Design The ... intramuscular morphine HCL 0.1 mg/kg in every 12 hours during the first 24 hours The rats were sacrificed using ether at lethal doses on day 21, when wound healing was complete and anti-adhesion barrier...

Ngày tải lên: 25/10/2012, 11:00

... prevalence of frontal sinus aplasia and agenesis using dental volumetric tomography in a population of Turkish individuals 279 was performed using two light-beam markers The vertical positioning ... (automatic exposure control system) Two dental radiologists in this study evaluated the DVT images using DVT software (Quantitative Radiology, NNT Software version 2.21, Verona, Italy) with respect ... performed to determine the reliability of this method Intra- and inter-observer agreement was analyzed using the weighted kappa test Results In the DVT scans, both agenesis (on the right) and aplasia...

Ngày tải lên: 25/10/2012, 11:04

... Preoperative Management All thirty selected patients underwent pre-admission investigative imaging using 99m Tc-sestamibi Injection of 20 to 25 mCi 99mTc-sestamibi was performed and views were acquired...

Ngày tải lên: 25/10/2012, 11:04

Ngày tải lên: 26/10/2012, 08:57

... local therapy and allow using uncemented implants If cortical bone should become preferable out of whatever circumstances it can be loaded with antibiotics as well34 Using adequate impregnation ... the sensitivities of periprosthetic tissue and sonicate-fluid culture rise from 45.0% to 75.0% Using immunofluorescence microscopy for visualizing dislodged pathogens after marking with specific ... further times more colonies than seen with light microscopy, amplification of bacterial genomes using PCR shows bacterial RNA in more than 70% of all THR revision cases, including the so called...

Ngày tải lên: 26/10/2012, 09:53

... labeled with digoxigenin by using the DIG-Chem-Link Labeling and Detection Set (Roche Diagnostics Corp., Indianapolis, IN) Detection of DIG-labeled nucleic acids was performed using the DIG Luminescent ... thigh) On Day 35, the rats were euthanized and scanned using CT Axial CT images (1-mm collimation and 1mm table increment) were obtained using the standard algorithm with 130 kV, 100 mA, a 2-second ... and BMP6 cDNA coding sequences Total RNA was prepared from the spleen of a 2month-old SD rat by using an RNeasy Mini Kit (Qiagen, Valencia, CA) according to the manufacturer’s instructions Rat...

Ngày tải lên: 31/10/2012, 17:08