Tiny Encryption Algorithm (TEA)

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Implementasi Pengenkripsian Dan Penyembunyian Data Menggunakan Tiny Encryption Algorithm Dan End Of File

Implementasi Pengenkripsian Dan Penyembunyian Data Menggunakan Tiny Encryption Algorithm Dan End Of File

Keamanan dan kerahasiaan data merupakan salah satu aspek penting dari suatu sistem informasi. Informasi yang disalahgunakan dapat berakibat kerugian yang sangat besar pada kasus-kasus besar seperti informasi penting rahasia perusahaan, data nasabah bank dan lain sebagainya. Solusi dalam pengamanan informasi salah satunya dapat digunakan dengan kriptografi. Algoritma kriptografi yang digunakan pada penelitian ini adalah tiny encryption algorithm. Serangan pengamanan data memakai kriptogafi selalu bisa dapat terjadi, dengan pemikiran ini penulis menambahkan teknik pengamanan dengan melakukan penyembunyian data dengan media gambar sebagai penampung, istilah ini disebut dengan steganografi. Steganografi yang digunakan pada penelitian ini adalah end of file. Teknik ini melakukan proses penyembunyian data yang terletak pada akhir citra, sehingga tidak mempengaruhi kualitas citra penampung. Pada penelitian ini, sistem yang dibangun menggunakan microsoft visual studio 2010 C# . Sistem ini dapat berfungsi dengan baik, namun memiliki warna blur yang ditimbulkan pada citra penampung yang diakibatkan oleh pesan yang disisipkan, dimana semakin besar ukuran pesan yang dsisipkan maka warna blur yang timbul pada citra akan semakin banyak.
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Institutional Repository | Satya Wacana Christian University: Perancangan dan Implementasi Kriptosistem Pada Aplikasi Chat Menggunakan Tiny Encryption Algorithm (TEA)

Institutional Repository | Satya Wacana Christian University: Perancangan dan Implementasi Kriptosistem Pada Aplikasi Chat Menggunakan Tiny Encryption Algorithm (TEA)

Chatting is a widely used communication technology. Thing that needs attention is, for some chat services, the data is passed on the internet conversations are not encrypted. Thus providing the data security loophole conversation. Tiny Encryption Algorithm (TEA) cipher is an encryption algorithm, can be used to encode data that is passed on the internet conversation. In this study, designed and implemented a cryptosystem, in the form of encrypted chat application. The application encrypts the conversation before being sent, and vice versa, the application will decrypt the received message. The results show that the cryptosystem is developed capable of encrypting messages without providing significant additional processing time.
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ANALISIS PERBANDINGAN KINERJA ALGORITMA TWOFISH DAN TEA (TINY ENCRYPTION ALGORITHM) PADA DATA SUARA | Hendra | JURNAL ILMIAH MATEMATIKA DAN TERAPAN 32 118 1 PB

ANALISIS PERBANDINGAN KINERJA ALGORITMA TWOFISH DAN TEA (TINY ENCRYPTION ALGORITHM) PADA DATA SUARA | Hendra | JURNAL ILMIAH MATEMATIKA DAN TERAPAN 32 118 1 PB

Tiny Encryption Algorithm (TEA) merupakan suatu algoritma sandi yang diciptakan oleh David Wheeler dan Roger Needham dari Computer Laboratory, Cambridge University, England pada bulan November 1994. Algoritma ini merupakan algoritma penyandian block cipher yang dirancang untuk penggunaan memory yang seminimal mungkin dengan kecepatan proses yang maksimal[5].

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Institutional Repository | Satya Wacana Christian University: Perancangan dan Implementasi Aplikasi Enkripsi-Dekripsi Folder Menggunakan Algoritma XTEA (Extended Tiny Encryption Algorithm)

Institutional Repository | Satya Wacana Christian University: Perancangan dan Implementasi Aplikasi Enkripsi-Dekripsi Folder Menggunakan Algoritma XTEA (Extended Tiny Encryption Algorithm)

Cryptography is a solution to secure information. A data owned can be obtained as a security information so that data is needed to make data is still protected. A Folder is a container that allows the arrangement of data in order to remain neat and easy file search. XTEA (Extended Tiny Encryption Algorithm) is the encryption algorithms, can be used to secure data in folder to remain intact and safe. The research was designed and implemented an encryption-decryption application folder, which can hide and secure the files and subfolders in the folder. The results of tests indicating that the applications it developed not to change the contents of a file during the process as well as the encryption and decryption folder the results of the encryption joined in two files of different so they could not be identified by respondents.
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Implementasi Pengenkripsian Dan Penyembunyian Data Menggunakan Tiny Encryption Algorithm Dan End Of File

Implementasi Pengenkripsian Dan Penyembunyian Data Menggunakan Tiny Encryption Algorithm Dan End Of File

Keamanan dan kerahasiaan data merupakan salah satu aspek penting dari suatu sistem informasi. Informasi yang disalahgunakan dapat berakibat kerugian yang sangat besar pada kasus-kasus besar seperti informasi penting rahasia perusahaan, data nasabah bank dan lain sebagainya. Solusi dalam pengamanan informasi salah satunya dapat digunakan dengan kriptografi. Algoritma kriptografi yang digunakan pada penelitian ini adalah tiny encryption algorithm. Serangan pengamanan data memakai kriptogafi selalu bisa dapat terjadi, dengan pemikiran ini penulis menambahkan teknik pengamanan dengan melakukan penyembunyian data dengan media gambar sebagai penampung, istilah ini disebut dengan steganografi. Steganografi yang digunakan pada penelitian ini adalah end of file. Teknik ini melakukan proses penyembunyian data yang terletak pada akhir citra, sehingga tidak mempengaruhi kualitas citra penampung. Pada penelitian ini, sistem yang dibangun menggunakan microsoft visual studio 2010 C# . Sistem ini dapat berfungsi dengan baik, namun memiliki warna blur yang ditimbulkan pada citra penampung yang diakibatkan oleh pesan yang disisipkan, dimana semakin besar ukuran pesan yang dsisipkan maka warna blur yang timbul pada citra akan semakin banyak.
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BAB 2 LANDASAN TEORI 2.1. Pengertian dan Tujuan Kriptografi - Implementasi Kombinasi Tiny Encryption Algorithm (TEA) Dan Algoritma Least Significant Bit(LSB)Untuk Keamanan File Text

BAB 2 LANDASAN TEORI 2.1. Pengertian dan Tujuan Kriptografi - Implementasi Kombinasi Tiny Encryption Algorithm (TEA) Dan Algoritma Least Significant Bit(LSB)Untuk Keamanan File Text

Tiny Encryption Algorithm (TEA) merupakan suatu algoritma sandi yang diciptakan oleh David Wheeler dan Roger Needham dari Computer Laboratory, Cambrigde University, England pada bulan November 1994. Algoritma ini mengenkripsi satu blok plaintext dengan jumlah bit tertentu dan menghasilkan blok ciphertext yang dirancang untuk penggunaan memori seminimal mungkin dengan kecepatan proses maksimal.

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Implementasi Metode Enkripsi Menggunakan Algoritma XXTEA (Corrected Block Tiny Encryption Algorithm) pada Aplikasi Surat Elektronik Berbasis Web - ITS Repository

Implementasi Metode Enkripsi Menggunakan Algoritma XXTEA (Corrected Block Tiny Encryption Algorithm) pada Aplikasi Surat Elektronik Berbasis Web - ITS Repository

Metode yang akan digunakan pada Tugas Akhir ini adalah metode enkripsi menggunakan algoritma XXTEA (Corrected Block Tiny Encryption Algorithm). Enkripsi adalah nama yang diberikan untuk proses penerapan algoritma pada sebuah pesan, yang mana proses tersebut akan mengacak data di dalamnya sehingga sangat sulit dan memakan waktu apabila data hasil enkripsi tersebut disimpulkan tanpa mengetahui kode/sandi khusus. Algoritma XXTEA merupakan pengembangan dari algoritma TEA dan XTEA. Algoritma XXTEA beroperasi dalam ukuran blok kelipatan 32 bit dan panjang kunci 128 bit. Pengacakan pada blok XXTEA ini berdasarkan blok pada kanan dan kiri blok yang sedang diacak.
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Implementasi Kombinasi Tiny Encryption Algorithm (TEA) Dan Algoritma Least Significant Bit(LSB)Untuk Keamanan File Text

Implementasi Kombinasi Tiny Encryption Algorithm (TEA) Dan Algoritma Least Significant Bit(LSB)Untuk Keamanan File Text

Bilangan delta berasal dari golden number, bilangan delta konstan yang digunakan adalah 9E3779B9, dimana bilangan delta=( √5 -1)2 31 . Suatu bilangan delta ganda yang berbeda digunakan dalam setiap round-nya sehingga tidak ada bit dari perkalian yang tidak berubah secara teratur. Berbeda dengan sruktur feistel yang semula hanya mengoperasikan satu sisi, yaitu sisi sebelah kanan dengan sebuah fungsi F,pada algoritma TEA kedua sisi dioperasikan dengan sebuah fungsi yang sama. Proses diawali dengan input-bit plaintext sebanyak 64 bit (Sari, 2009). Kemudian ke- 64 bit tersebut dibagi menjadi dua bagian, yaitu sisi kiri (L0) sebanyak 32 bit dan di sisi kanan (R0) sebanyak 32 bit.
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Institutional Repository | Satya Wacana Christian University: Perancangan dan Implementasi Aplikasi Enkripsi-Dekripsi Folder Menggunakan Algoritma XTEA (Extended Tiny Encryption Algorithm)

Institutional Repository | Satya Wacana Christian University: Perancangan dan Implementasi Aplikasi Enkripsi-Dekripsi Folder Menggunakan Algoritma XTEA (Extended Tiny Encryption Algorithm)

Cryptography is a solution to secure information. A data owned can be obtained as a security information so that data is needed to make data is still protected. A Folder is a container that allows the arrangement of data in order to remain neat and easy file search. XTEA (Extended Tiny Encryption Algorithm) is the encryption algorithms, can be used to secure data in folder to remain intact and safe. The research was designed and implemented an encryption- decryption application folder, which can hide and secure the files and subfolders in the folder. The results of tests indicating that the applications it developed not to change the contents of a file during the process as well as the encryption and decryption folder the results of the encryption joined in two files of different so they could not be identified by respondents.
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Extended Tiny Encryption Algorithm.

Extended Tiny Encryption Algorithm.

Many solutions can be used to handle information’s security problem. One of solutions to protect data is to encrypt the data. There are two general types of encryption algorithm, symmetric algorithm and asymmetric algorithm. The Algorithm that used in this project is XTEA, one of symmetric algorithm type that encodes and decodes using only one same key. Sent data is encrypted data or so called the ciphertext. After data is received, data will be processed back to the original data or so called the plaintext.

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Implementasi Metode Tiny Encryption dan Skema K-N Visual Cryptography Untuk Pengamanan dan Pemecahan File Rahasia

Implementasi Metode Tiny Encryption dan Skema K-N Visual Cryptography Untuk Pengamanan dan Pemecahan File Rahasia

Data confidentiality is important in information technology as it is today. In certain cases, there are circumstances which an agency has confidential data that must be shared among several people, and to access the data, it requires a certain amount of fraction or share, so that the data can be reconstructed back to the original data. This problem can be solved by using Visual Cryptography k-n scheme. In this study, secret file is encrypted by Tiny Encryption Algorithm (TEA) method and the encrypted file is broken into n fractions by sharing bit 1 randomly into several file fractions. To reconstruct the file or to restore the original file, it takes at least k fraction. The merge process uses the OR function, and the result is decrypted by TEA method. Application can be used to secure confidential data or files by encrypting them using TEA method and breaking them using the Visual Cryptography k-n scheme. According to testing made, the reconstruction process runs faster than the splitting process, and the success of the reconstruction process reaches 100% if the decryption key is same as the encryption key and the number of fractions merged is greater than or equal to the value of k.
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Implementasi Metode Tiny Encryption dan Skema K-N Visual Cryptography Untuk Pengamanan dan Pemecahan File Rahasia

Implementasi Metode Tiny Encryption dan Skema K-N Visual Cryptography Untuk Pengamanan dan Pemecahan File Rahasia

Data confidentiality is important in information technology as it is today. In certain cases, there are circumstances which an agency has confidential data that must be shared among several people, and to access the data, it requires a certain amount of fraction or share, so that the data can be reconstructed back to the original data. This problem can be solved by using Visual Cryptography k-n scheme. In this study, secret file is encrypted by Tiny Encryption Algorithm (TEA) method and the encrypted file is broken into n fractions by sharing bit 1 randomly into several file fractions. To reconstruct the file or to restore the original file, it takes at least k fraction. The merge process uses the OR function, and the result is decrypted by TEA method. Application can be used to secure confidential data or files by encrypting them using TEA method and breaking them using the Visual Cryptography k-n scheme. According to testing made, the reconstruction process runs faster than the splitting process, and the success of the reconstruction process reaches 100% if the decryption key is same as the encryption key and the number of fractions merged is greater than or equal to the value of k.
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Security Chp8 Lab A Site2Site VPN Instru 001

Security Chp8 Lab A Site2Site VPN Instru 001

a. To make use of the IPsec encryption with the VPN, it is necessary to define extended access lists to tell the router which traffic to encrypt. A packet that is permitted by an access list used for defining IPsec traffic is encrypted if the IPsec session is configured correctly. A packet that is denied by one of these access lists is not dropped, but sent unencrypted. Also, like any other access list, there is an implicit deny at the end, which, in this case, means the default action is to not encrypt traffic. If there is no IPsec security association correctly configured, no traffic is encrypted, and traffic is forwarded as unencrypted.
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KEAMANAN INFORMASI DAN JARINGAN   ASYMME

KEAMANAN INFORMASI DAN JARINGAN ASYMME

 Decryption algorithm, accept the ciphertext and match it to produce the plaintext.  Using algorithms that requires two separate keys, secret (or private) and public.  The public key is used, for example, to encrypt plaintext or to verify a digital signature.  The private key is used for the opposite operation, in these examples to decrypt

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High throughput FPGA implementation of Advanced Encryption Standard algorithm

High throughput FPGA implementation of Advanced Encryption Standard algorithm

based on the CAM-based SubBytes scheme [27]. By properly pipelining, the proposed CAM-based SubBytes needs a smaller gate delay than the ROM-based design. Two implementations of the AES algorithm are introduced, the first design is based on the basic architecture of the AES and the second one is based on the sub-pipelined architecture of the AES [28]. A new efficient architecture for high-speed AES encryptor is presented [31]. This technique is implemented using composite field arithmetic byte substitution, where higher efficiency is achieved by merging and location rearrangement of different operations required in the steps of encryption. In addition, multistage sub-pipelined architecture is used to allow having higher efficiency in terms of throughput and area. Composite field arithmetic in normal bases is employed to propose a low-cost S-box for the AES [32]. Moreover, authors present efficient key expansion architecture convenient for 6 sub-pipelined round units. Authors present design, implementation and comparison of highly efficient architectures for AES on FPGAS: Iterative architecture and pipelined architecture [33]. The first design is optimized for area and the second one is optimized for speed. An extension of a general-purpose processor with a crypto coprocessor for encryption and decryption of information is described [35]. High throughput digital design of the 128-bit AES algorithm based on the 2-slow retiming technique on FPGA is presented [36]. Equivalent pipelined AES architecture working on CTR mode is presented to provide high throughput through inserting some registers in appropriate points making the delay shortest, when implementing the byte transformation in one clock period [37]. AES implementation [38] is mainly targeted for low-cost embedded applications. It introduces parallel operation in the folded architecture to obtain better throughput. Authors map operations of AES from Galois Field (2 8 ) to GF (2 4 ) to obtain an area-efficient masked AES implementation [39]. Fully pipelined crypto processor is presented [40], where AES is integrated with a 32-bit general purpose 5-stage pipelined MIPS processor. Three high-throughput AES implementations in ECB mode and one ultra-high throughput AES implementation in CTR mode [42]. They performed area-delay efficient multiplier and multiplicative inverter over GF(2 8 ). Moreover, loop- unrolling, fully pipelining, and fully sub-pipelining techniques are also used and the registers are placed in optimal placement. Compact and high-speed hardware architectures and logic optimization methods for the AES algorithm [43]. It proposes a methodology to optimize the S- Box by introducing a new composite field.
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Performance of Chaos-Based Encryption Algorithm for Digital Image

Performance of Chaos-Based Encryption Algorithm for Digital Image

Presentation of information in digital form is highly vulnerable againts information abusing. Digital image is one of digital information which is frequently becomes a target of crime. Therefore, reliable, secure, and fast security techniques are required in digital image information. In this study, chaos-based encryption algorithm for digital image is built to improve endurance from brute force and known plaintext attack. The algorithm use logistic map as a random number generator for key stream. According to test and analysis, this algorithm has key space of , key sensitivity up to , the key stream is proved random, and the distribution of pixels value from encrypted image is proved uniform. So, it can be concluded that, the algorithm is very difficult to be cracked by brute force attack and also known plaintext attack.
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NIST Special Publication 800-63B

NIST Special Publication 800-63B

Sensitive information may continue to need confidentiality protection beyond the date when the algorithm and key length used to protect that information are no longer considered adequate. Block cipher algorithms use the same key for encryption to produce ciphertext data as must be used to decrypt the ciphertext data back to the original plaintext data. However, since the algorithm and key length used to encrypt the information are no longer considered secure, those entities using the algorithm to decrypt the ciphertext data should consider that an adversary may be capable of determining the key that was used for encryption. If the adversary has access to the ciphertext data and can determine the key, then the data no longer has reliable confidentiality protection. That is, the owner of the sensitive information should consider the information to no longer be protected (i.e., the information should be considered as being in plaintext form). Several scenarios need to be considered when evaluating whether or not the information is or will remain secure.
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FPGA Based Implementation Of AES Encryption Algorithm Using Xilinx System Generator.

FPGA Based Implementation Of AES Encryption Algorithm Using Xilinx System Generator.

paper, we report on the implementation and hardware platform of a real time video encryption processing. The processing encrypts videos in real time using the AES Algorithm. We propose a computationally efficient architecture for AES. The system is optimized in terms of execution speed and hardware utilization.

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The Implementation of Henon Map Algorithm for Digital Image Encryption

The Implementation of Henon Map Algorithm for Digital Image Encryption

By encrypting data so that only the recipient can only decrypt the data is one of solutions that many enggineers do. Some encryption algorithms such as DES, AES, RSA, and others have been widely used to encrypt the image data, but these algorithms still must be improved durability of various attacks, such as brute force attacks [1]. Many research have been done in how to improve the durability of the algorithms used in the encryption process from a brute force attack, provide a good combination of speed, high security, complexity, and computational power, etc [2],[3]. One of them is using the chaos theory. Chaos-based encryption also been extensively studied by researchers because of its superior in safety and complexity [4]. One algorithm which implements the theory of chaos is the Henon map algorithm, this algorithm implements chaos theory by generating random numbers with two initial values. The algorithm implements the chaos theory that has sensitivity to small changes in initial parameter values and has a high level of security from brute force attacks [5]-[11].
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Implementasi Metode Tiny Encryption dan Skema K-N Visual Cryptography Untuk Pengamanan dan Pemecahan File Rahasia

Implementasi Metode Tiny Encryption dan Skema K-N Visual Cryptography Untuk Pengamanan dan Pemecahan File Rahasia

Perkembangan komputer dan sistem komunikasi pada tahun 1960-an mengakibatkan kebutuhan pihak swasta akan alat untuk melindungi informasi dalam bentuk digital. Dimulai dengan usaha Feistel di IBM pada awal tahun 1970-an dan mencapai puncaknya pada tahun 1977, ketika Data Encryption Standard (DES) diadopsi sebagai Standar Pemrosesan Informasi pemerintah Amerika Serikat. Metode ini menjadi alat standar untuk mengamankan electronic commerce bagi banyak institusi financial di seluruh dunia. (Munir, 2006:2)

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