Format preservation based masking system and method

A computer implemented format preservation based masking method, comprising:

• obtaining an input set of letters and a private key from one or more sources and an original data from a user;
• encrypting the input set of letters to obtain a set of encrypted letters list using one or more encryption technique, wherein the one or more encryption technique considers the private key as one of parameter for the encryption;
• generating a dynamic map using the set of encrypted letters list, wherein the dynamic map is generated by mapping the encrypted letters list with the input set of letters, and wherein the dynamic map comprises a set of keys, wherein each key is specific to a letter in the input set of letters;
• calculating a position of each of maskable letters in the dynamic map and assigning an index value to a first maskable letter based on total number of maskable letters in the dynamic map, wherein the index value is incremented for each of a succeeding maskable letter in the dynamic map;
• and
• performing masking of each of the maskable letters using the calculated position of each of said maskable letters to obtain masked data using said dynamic map, the wherein the masked data is based on a position of individual letter in the original data.

One or more non-transitory machine readable information storage mediums comprising one or more instructions, which when executed by one or more hardware processors causes to perform a computer implemented format preservation based masking method comprising:

• obtaining an input set of letters and a private key from one or more sources and an original data from a user;
• encrypting the input set of letters to obtain a set of encrypted letters list using one or more encryption technique, wherein the one or more encryption technique considers the private key as one of parameter for the encryption;
• generating a dynamic map using the set of encrypted letters list, wherein the dynamic map is generated by mapping the encrypted letters list with the input set of letters, and wherein the dynamic map comprises a set of keys, wherein each key is specific to a letter in the input set of letters;
• calculating a position of each of maskable letters in the dynamic map and assigning an index value to a first maskable letter based on total number of maskable letters in the dynamic map, wherein the index value is incremented for each of a succeeding maskable letter in the dynamic map;
• and
• performing masking of each of the maskable letters using the calculated position of each of said maskable letters to obtain masked data using said dynamic map, the wherein the masked data is based on a position of individual letter in the original data.