Checksums and Hashing
CSC111 Spring 2014
Theory of check sums, check digits and hashes
Information is a critical component of practically every human endeavor.
Therefore, a great deal of energy is expended in assuring its accuracy. Many
errors can creep i
Hexadecimal to binary
cfw_base 16 to base 2
Using this chart, for each hex digit write the corresponding 4-bit binary sequence.
Binary to hexadecimal
cfw_base 2 to base 16
Using this chart, going from right to left, for each 4-bit binary s
The basic idea:
To increase security, on most systems passwords are never stored in the
clear. Instead, as soon as a password is entered, it is encrypted using a
particular encryption algorithm. And, instead of storing the password, i