In the Amoeba scheme for protecting capabilities, a user can ask the server to produce a new

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In the Amoeba scheme for protecting capabilities, a user can ask the server to produce a new capability with fewer rights, which can then be given to a friend. What happens if the friend asks the server to remove even more rights so that the friend can give it to someone else?
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Modern Operating Systems

ISBN: 978-0133591620

4th edition

Authors: Andrew S. Tanenbaum, Herbert Bos

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