Hash coding algorithm

Problems may arise if the lengths of the inverted lists differ. This may be because certain wavenumbers are more typical than others or certain chemical structures appear more often, for example, -C-C- is more frequent than -C=C-. The solution to this problem is the appHcation of Hash coding algorithms the key is coded by a random number that is then stored in a random access file. 

Symmetric key cryptography uses a polyalpha-betic encryption algorithm, such as a block cipher, a stream cipher, or a hash function to convert the data into binary code. A block cipher apphes the same key to each block of data. Stream ciphers encrypt the data bit by bit. They can operate in several ways, but two common methods are self-synchronizing and synchronous. The self-synchronizing cipher encrypts the data bit by bit, using an algebraic function applied to the previous bit. Synchronous ciphers apply a succession of functions independent of the data. 

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