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write your own implementation of htonl using both your own htonl and if little-endian hardware is available the
xdr is used to encodedecode the header for the sunrpc protocol illustrated by figure 520 the xdr version is determined
it is said that ipsec may not work with network address translation nat rfc 1631 however whether ipsec will work with
suppose the values x and y used in the three-way handshake of figure 89 were clock driven rather than random for
figure 87 shows cbc encryption give the corresponding diagram for decryptionfigure
learn about a key escrow encryption scheme for example clipper what are the pros and cons of key
suppose that rsa is used to send a message m to three recipients who have relatively prime encryption moduli n1 n2 and
one mechanism for resisting replay attacks in password authentication is to use one-time passwords a list of passwords
the diffie-hellman key exchange protocol is vulnerable to a man-in-the-middle attack explain how an adversary sitting
suppose we have a very short secret s eg a single bit or even a social security number and we wish to send someone else
prove that the rsa decryption algorithm recovers the original message that is med equiv m mod pq hint you may assume
suppose you are doing rsa encryption with p 101 q 113 and e 3a find the decryption exponent d hint although there
ipv6 simplifies arp out of existence by allowing hardware addresses to be part of the ipv6 address how does this
discuss how you might rewrite smtp or http to make use of a hypothetical general-purpose requestreply protocol perhaps
as presented in the text smtp involves the exchange of several small messages in most cases the server responses do not
one of the central problems faced by a protocol such as mime is the vast number of data formats available consult the
find an encryption utility eg the unix des command or pgp on your system read its documentation and experiment with it
suppose in the other direction we abandon any pretense at all of dns hierarchy and simply move all the com entries to
many smaller organizations have their web sites maintained by a third party how could you use who is to find if this is
what is the relationship between a domain name eg csprincetonedu and an ip subnet number eg 19212690 do all hosts on
figure 94 shows the hierarchy of name servers how would you represent this hierarchy if one name server served multiple
use the who is utilityservice to find out who is in charge of your site at least as far as the inter nic is concerned
one feature of the existing dns com hierarchy is that it is extremely widea propose a more hierarchical reorganization
what dns cache issues are involved in changing the ip address of say a web server host name how might these be
most telnet clients can be used to connect to port 25 the smtp port instead of to the telnet port using such a tool