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Extra resources for The ignition of explosives by radiation :Eggert, J., J. Phys. Chem. 63(1): 11-15, Jan. 1959. Illus

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In the event that an employee is unable to be in the office, for example, due to illness, accident or death, another employee can take over that job function without significantly undermining the operation of the role. Delegation thus becomes a normal part of the B2B e-commerce structure, mirroring usual business practice. Figure 2 shows the order in which an electronic message is signed by Bob with his own personal key, followed by the role CEO and the company ACME Corp. (where the role and company signing are performed by separate, trusted computers).

Without any legal liabilities at present, manufacturers see little need to take remedial steps and to offer high-trust commodity computer systems. Computer hardware manufacturers and software houses are not mentioned in legislation as maintaining any liability, and legal disclaimers place the risk of computing systems onto users. It is almost impossible to dictate user key management practices (Anderson, 1994b; Davis, 1996). Responsibility for the protection of a user’s private key, essentially their “digital identity”, lies solely with the user.

The test for validity of the signature is whether what has been written was done by the testator as an authentication of what precedes it as his or her will. It must be provable in a court of law that the mark is affixed with such instruments by the signing person or under his or her authorisation. In this sense, there are some notable physical and legal differences between "autographs", "signatures" and "seals". A handwritten signature is a human biometric action controlled and explicitly performed by an individual, while a seal is a physical token wielded by its owner.

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The ignition of explosives by radiation :Eggert, J., J. Phys. Chem. 63(1): 11-15, Jan. 1959. Illus


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