Data encrypting and decrypting apparatus and method
OwnerDaniel Tiong Ho{umlaut over (k)} Taninventor
Life of this patent
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Abstract
A crytography method of encrypting data is disclosed. The method provides for creating or selecting a master key. Thereafter, the data to be encrypted is segmented into data blocks of equal or variable lengths. For each data block a sub-key of an arbitrary starting position is selected from a pre-defined set of arbitrary positions and of matched or unmatched length from the master key, where the master key length is selected from a pre-defined set of arbitrary lengths. Having acquired the sub-key for each data block, each data block is encrypted using its sub-key and an encryption algorithm.
Claims23
A method of encrypting data including the following steps:
- (a) creating or selecting a master key;
- (b) segmenting the data into data blocks of equal or variable lengths;
- (c) for each data block selecting a sub-key of arbitrary starting position selected from a pre-defined set of arbitrary positions and of matched or unmatched length from the master key, said length being selected from a pre-defined set of arbitrary lengths;
- and
- (d) encrypting each data block using its sub-key and an encryption algorithm.
A method of encrypting data including the following steps:
- (a) creating or selecting a master key;
- (b) creating a seed which includes a pre-defined set of suitable algorithms;
- (c) segmenting the data into data blocks of equal or variable lengths;
- (d) for each data block selecting an encryption algorithm from said pre-defined set of suitable algorithms;
- (e) encrypting each data block using its encryption algorithm.
A method of communicating data in a secure manner from a message transmitter to a message receiver including the following steps:
- (a) creating a seed which includes a set of arbitrary sub-key start positions, a set of arbitrary sub-key lengths, and a set of suitable encryption algorithms;
- (b) communicating the seed to the message receiver over a secured channel;
- (c) creating or selecting a master key;
- (d) communicating the master key to the message receiver over a secured channel;
- (e) dividing the data into data blocks of arbitrary length;
- (f) for each data block, selecting from the seed a sub-key start position, a sub-key length, and an encryption algorithm;
- (g) using the sub-key start position and length for each data block to derive from the master key a sub-key for that data block;
- (h) encrypting each data block using that data block's sub-key and encryption algorithm;
- (i) transmitting each encrypted data block to the receiver together with a sub-key start position index number, sub-key length index number and encryption algorithm index number for each data block, enabling the receiver to derive the appropriate sub-key and encryption algorithm and thereby to decrypt the data block.
Apparatus for encrypting data including:
- (a) a data block creating processor, which accepts a stream of data as its input, and outputs the data in the form of blocks;
- (b) a random selector, which selects a sub-key start position and a sub-key length;
- (c) a sub-key selector, which accepts as inputs a master key, the sub-key start position and sub-key length, and derives from these a sub-key;
- (d) an encryption processor, which accepts as inputs a sub-key and a data block, and uses the sub-key to encrypt the data block according to an encryption algorithm.
Apparatus for communicating data in a secure manner from a message transmitter to a message receiver, including:
- (a) a data block creating processor, which accepts a stream of data as its input, and outputs the data in the form of blocks;
- (b) a random selector, which selects a sub-key start position, a sub-key length, and an encryption algorithm;
- (c) a sub-key selector, which accepts as inputs a master key, the sub-key start position and sub-key length, and derives from these a sub-key;
- (d) an encryption processor, which accepts as inputs a sub-key, an encryption algorithm and a data block, and uses the sub-key to encrypt the data block according to the encryption algorithm;
- and
- (e) apparatus for transmitting each encrypted data block to the receiver together with a sub-key start position index number, sub-key length index number and encryption algorithm index number for each data block, enabling the receiver to derive the appropriate sub-key and encryption algorithm and thereby to decrypt the data block.
Apparatus for communicating data in a secure manner from a message transmitter to a message receiver, including:
- (a) a data block creating processor, which accepts a stream of data as its input, and outputs the data in the form of blocks;
- (b) a plurality of encryption processors, each embodying an encryption algorithm, and each of which accepts as inputs a sub-key and a data block, and uses the sub-key to encrypt the data block according to its algorithm;
- (c) a random selector, which selects, for each data block, a sub-key start position, a sub-key length, and an encryption processor;
- (d) a sub-key selector, which accepts as inputs a master key, the sub-key start position and sub-key length, and derives from these a sub-key;
- apparatus for transmitting each encrypted data block to the receiver together with a sub-key start position index number, sub-key length index number and encryption algorithm index number for each data block, enabling the receiver to derive the appropriate sub-key and encryption algorithm and thereby to decrypt the data block.
Dependencies are inferred from the claim text.