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Part: CS5010
Category:
Communication
-> Network
-> Encoder/Decoder/Encryption/Decryption
Description: DES/3DES Encryption/decryption Ultra Compact
Company: Amphion
Datasheet: Download CS5010 datasheet File size : 960 kB
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Datasheet text preview:
DES/3DES Encryption/Decryption Cores
CS5010-40
Virtual Components for the Converging World
TM
The CS5010-CS5040 DES/3DES Encryption/Decryption cores are designed to achieve data privacy in digital broadband, wireless, and multimedia systems. These high performance application specific silicon cores support the Data Encryption Standard (also referred as Data Encryption Algorithm) as described in the NIST Federal Information Processing Standard 46-3. They offer an efficient means of providing both DES and Triple DES encryption and decryption in one core in order to rapidly construct complete security solutions. The DES/3DES family of cores are available in both ASIC and programmable logic versions that have been hand crafted by Amphion to deliver high performance while minimizing power consumption and silicon area.
Patient Room Camera
Nurse Station PC
MPEG-2 Encoder
MPEG-2 Decoder
Security Gateway High Speed DES/3DES Encoder 10/100-Base T-Hub
Securiey Nurs t Gattatway S e ion HighPC Speed DES/3DES Decoder
Figure 1: Example of a Secure Audio/Video Based Remote Patient Monitoring System Using DES/3DES
ENCRYPTION CORE FEATURES
Table 1: CS5010-40 Features at a Glance CS5010 Ultra Compact
Fully compliant with DES NIST FIPS 46-3 DES and Triple DES Support 32-bit I/O 128-bit I/O 28-bit Key Input Port 56-bit Key Input Port EDE2 and EDE3 Triple DES (112- or 168-bit key length)
CS5020 Compact · · ·
CS5030 High Speed · · ·
CS5040 Ultra HIgh Speed · ·
· · ·
· · · · · · · · ·
Amphion continues to expand its family of application-specific cores See http://www.amphion.com for a current list of products
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CS5010-40
DES/3DES Encryption/Decryption Cores
APPLICATIONS
Electronic financial transactions - eCommerce - Banking - Securities exchange - Point-of-Sale Secure corporate communications - Storage Area Networks (SAN) - Virtual Private Networks (VPN) - Video conferencing - Voice services
Personal mobile communications - Video phones - PDA - Point-to-Point Wireless - Wearable computers Secure environments - Satellite communications - Surveillance systems - Network appliances
DATA ENCRYPTION ALGORITHM
The Data Encryption Algorithm is an iterated block cipher with a Feistel structure that encrypts and decrypts data in 64bit data blocks using a 56-bit key. The algorithm consists of: · · · An initial permutation of the input data Sixteen rounds of the same process - the DES round A final inverse initial permutation of the data
Figure 2 represents a block diagram of the Data Encryption Algorithm. A DES round transforms the data using permutations, additions and non-linear substitutions. The DES key schedule consists of three parts: 1. 2. Key Permutation - to remove the eight redundant parity bits within the 64-bit key, and to permute the key Scheduled Circular Shifting - the permuted key is circularly shifted according to a schedule by either 1 or 2 bits, to the left or right. Key Compression - the 56-bit shift key is compressed using another permutation, or rearrangement, to obtain a 48-bit subkey.
3.
The Triple Data Encryption Algorithm offers increased security by extending the DES key to 112 or 168 bits, thus greatly reducing the effectiveness of exhaustive key searches or "brute-force" attacks. Triple DES is simply three successive DES operations in the sequence of encrypt-decrypt-encrypt, or decrypt-encrypt-decrypt if decrypting data.
Figure 2: DES Algorithm Structure
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TM
FUNCTIONAL DESCRIPTION
The Amphion series of DES/3DES cores offer a complete solution to maintaining legacy DES functionality for modern data encryption needs, offering a simple interface, no internal or external memory usage, no external keyspace processing, and a highly efficient design offering unparalleled performance. The CS5010 Ultra Compact DES/3DES and the CS5020 Compact DES/3DES Cores are designed to offer an efficient yet high performance means of both DES and Triple DES encryption/decryption, with the emphasis on reduced resource usage. The CS5030 High Speed DES/3DES Core offers an increased data throughput in comparison to the Compact Cores, while still achieving a highly efficient hardware implementation. The CS5040 Ultra High Speed DES/3DES Core is designed to provide a high performance solution while still achieving a relatively low resource usage. The Ultra Compact DES/3DES Core is capable of all DES standard modes of operation. The use of these added modes of operation on Compact, High Speed and Ultra High Speed DES/3DES Cores is subject to conditions. For example, it is impractical to use a fully pipelined DES core to perform CBC mode, as the data throughput of the hardware would have to be substantially reduced in order to support the feedback XOR operation between output and input of the DES core. All versions of the Amphion DES/3DES cores follow the block diagram shown in Figure 3. The DES/3DES cores are excellent complements to other Amphion cores. For instance they can be combined with the CS6650 MPEG-2 Decoder to rapidly construct a secure patient monitoring system, and they can be combined with the CS4191 ADPCM codec to achieve secure, high speed, high channel-count speech processing in Voice-over-Packet (VoP) systems. The Amphion encryption/decryption cores are also an excellent choice for VPN security ICs incorporated into broadband switches, routers, firewalls and remote access concentrators. Likewise, the cores are an ideal fit for the Secure Socket Layer (SSL) channel ICs used in Web servers, WAP gateways and other access applications requiring a high number of parallel SSL channels to carry out eCommerce.
Control Logic
Plaintext/ Ciphertext
Input Buffer
DES Round Transformations
Output Buffer
Ciphertext/ Plaintext
Key
Key Buffer
Key Scheduler
Figure 3: Block Diagram of DES/3DES Cores
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CS5010-40
DES/3DES Encryption/Decryption Cores
CS5210-40 SYMBOL AND PIN DESCRIPTION
Table 2 describes the input and output ports (shown graphically in Figure 4) of the CS5010-40 series of DES/3DES encryption cores. Unless otherwise stated, all signals are active high and bit(0) is the least significant bit.
D DADDR DLOAD KEY KADDR KLOAD MODE TRIPLE EDE CLK RST
Figure 4: CS5010-40 DES/3DES Symbol
DSTAT
DES/3DES
QSTRB QADDR Q
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Table 2: CS5010-40 DES/3DES Cores Interface Signal Definitions Signal
D DADDR
I/O
I I
Width (Bits)
32 (64 Ultra High Speed) 1 (Ultra Compact) 2 (Compact) 3 (High Speed) 0 (Ultra High Speed) 1 28 (56 Ultra High Speed) 2 1 1 1 1 1 1 1
Description
Input Plaintext/Ciphertext data Input Plaintext/Ciphertext data address, 0: the lowest 32-bit word
DLOAD KEY KADDR KLOAD MODE TRIPLE EDE CLK RST DSTAT
I I I I I I I I I O
Load input Plaintext/Ciphertext enable Encryption key data Encryption key address, 0: the lowest 28-bit word Load encryption key Encryption/Decryption mode select, 0: Encryption. 1: Decryption DES/3DES mode select, 0: DES, 1:3DES Triple DES key selection mode, 0:EDE2, 1: EDE3 System clock, rising edge active Asynchronous reset Input port status This signal will be Asserted when the core is ready for loading the highest word of the next 64-bit data block, or the highest word of the multiple input DES blocks available in the Compact or High Speed cores. The lower words can be loaded at anytime in the period when DSTAT is LOW depending on the key-size selection Output strobe indicating the Plaintext/Ciphertext word Q is valid Output Plaintext/Ciphertext data address, 0: the lowest 32-bit word
QSTRB QADDR
O O
1 1 (Ultra Compact) 2 (Compact) 3 (High Speed) 0 (Ultra High Speed) 32 (64 Ultra High Speed)
Q
O
Output Plaintext/Ciphertext data
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