Information technology. Security techniques. Message Authentication Codes (MACs) - Mechanisms using a dedicated hash-function1 Scope This part of ISO IEC 9797 specifies three MAC algorithms that use a secret key and a hash function (or its round function) with an n bit result to calculate an m bit MAC. These mechanisms can be used as data integrity mechanisms to verify that data has not been altered in an unauthorized manner. They can also be used as message authentication mechanisms to provide assurance that a message has been originated by an entity in possession of the

and personnel training that contribute to water efficiency management

BS 2782-1: Method 131B covers molding conditions

c) Additional data that can be used in conjunction with BS EN 1991-1-4:2005

BS EN 13179-1 on tests for filler aggregate is useful for:

The Ds specify the total test sequence to be applied

some have been reclassified

Heat-treatment-procedure specification

a) information exchanged between contractor and site information system (execution phase):

The standard doesn’t apply to gas installations in towed or motorized leisure accommodation vehicles

to reconcile objectives

This International Standard specifies requirements and recommendations for ultrasonic liquid flowmeters

This clause describes the documentation which should be provided to the client on completion of I&HAS