参数资料
型号: VMS115
元件分类: 加密电路
英文描述: TELECOM, DATA ENCRYPTION CIRCUIT, PQFP100
封装: MQFP-100
文件页数: 3/64页
文件大小: 572K
代理商: VMS115
VLSI Technology, a subsidiary of Philips Semiconductors
8/10/99
11
Revision: 2.3
906
Data Sheet
5.1.2.3.1
Single DES Throughput Calculations
These throughput figures assume the 4-Byte In Place Buffer is not starved for data.
P = packet size in bytes
n = number of 64-bit blocks = Round up to nearest integer [(P * 8)/64]
f = frequency = 80 MHz
For n = 1 or 2
Cycles Required = Load Context + ((D+E) * n) + 4 + C + F
= 21 + ((D+E) * n) + 13
For n >= 3
Cycles Required = Load Context + [(n - 2)*(4 + (D+E))] + (2 * (D+E)) + C + 4 + F
= 21 + [(n - 2)*(4 + (D+E))] + (2 * (D+E)) + 13
Throughput = (f * P * 8)/Cycles Required
5.1.3
Hash Engine
The hash engine implements the FIPS 180-1 compliant Secure Hash Algorithm (SHA-1) and the
MD5 hash algorithm. These algorithms are used for computing condensed representations of a
message or data file, called a message digest. SHA-1 generates a 160-bit message digest while
MD5 generates a 128-bit message digest. The algorithm is designed to have the following proper-
ties: it is computationally infeasible to find a message which corresponds to a given message
Single DES Processing
Function
Description
Clock Cycles
Load Context
21
A
Load In-Place Buffer.
3
B
Load Word Align Buffer.
3
CLoad DES Core.
1
D
DES Processing.
8
E
Unload DES Core.
1
F
Load Data Into SSRAM Buffer.
8
Single DES Performance Table
Packet Size (Bytes)
DES (Mbits/sec)
64
315
256
370
1500
389
Packet Size => Infinity
393
相关PDF资料
PDF描述
VN-84-AR-1 9800 MHz - 10400 MHz RF/MICROWAVE SGL POLE TRIPLE THROW SWITCH, 1.7 dB INSERTION LOSS
VN-84-ARD-1 9800 MHz - 10400 MHz RF/MICROWAVE SGL POLE TRIPLE THROW SWITCH, 1.7 dB INSERTION LOSS
VN-84-AS-1 9800 MHz - 10400 MHz RF/MICROWAVE SGL POLE TRIPLE THROW SWITCH, 1.7 dB INSERTION LOSS
VN-86-AR-1 10000 MHz - 10500 MHz RF/MICROWAVE SGL POLE TRIPLE THROW SWITCH, 1.7 dB INSERTION LOSS
VN-86-ARD-1 10000 MHz - 10500 MHz RF/MICROWAVE SGL POLE TRIPLE THROW SWITCH, 1.7 dB INSERTION LOSS
相关代理商/技术参数
参数描述
VMS1177 制造商:CPI 制造商全称:CPI 功能描述:Magnetron
VMS1197B 制造商:CPI 制造商全称:CPI 功能描述:Magnetron
VMS128K8MB-100 制造商:未知厂家 制造商全称:未知厂家 功能描述:x8 SRAM Module
VMS128K8MC-100 制造商:未知厂家 制造商全称:未知厂家 功能描述:x8 SRAM Module
VMS128K8MF-100 制造商:未知厂家 制造商全称:未知厂家 功能描述:x8 SRAM Module