Need-to-Know Only: Use Encryption to Make Data Meaningless to Prying Eyes

Need-to-Know Only: Use Encryption to Make Data Meaningless to Prying Eyes

August 29, 2017 | By Rick Robinson


＜Fundamental Encryption Techniques＞

If we cannot encrypt this data, how can we keep it secure? With the right set of capabilities, you can protect specific types of data using the same cryptographic principles in a way that does not interfere with business applications. This enables you to employ one of the following three fundamental encryption techniques.

#1
Format-preserving encryption allows data to be truly encrypted but maintain the same format as the original data set. The process takes a little longer because the enciphered data needs to retain formats.

#2
Tokenization has no relationship at all to the original data. The token is a replacement for the original data, but is not derived from it. The only way to reverse tokenized data is to look up what the original data was using the token.

#3
Redaction is a method in which many characters are replaced with the same letter. For example, a credit card number may by represented by an asterisk, save for the last four digits. You cannot recover the credit card number from a figure such as “**** **** **** 1234,” but you can have high level of confidence that you are comparing the correct card number by cross-referencing the last four digits.


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