Width of CRC (8, 16 or 32 bit) Polynomial Initial CRC value Final XOR value Input reflected Result reflected

The Advanced Encryption Standard (AES) is a symmetric block cipher chosen by the U.S. government to protect classified information. AES is implemented in software and hardware throughout the world to encrypt sensitive data. It is essential for government computer security, cybersecurity and electronic data protection.

Generate strong, random passwords. Do not use the same password, security question and answer for multiple important accounts.

HMAC (Hash-based Message Authentication Code) is a type of a message authentication code (MAC) that is acquired by executing a cryptographic hash function on the data (that is) to be authenticated and a secret shared key. Like any of the MAC, it is used for both data integrity and authentication.

A QR code (abbreviated from Quick Response code) is a type of matrix barcode (or two-dimensional barcode[1]) invented in 1994 by the Japanese automotive company Denso Wave.[2] A barcode is a machine-readable optical label that contains information about the item to which it is attached.

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JSON stands for JavaScript Object Notation JSON is a lightweight format for storing and transporting data JSON is often used when data is sent from a server to a web page JSON is "self-describing" and easy to understand

SHA is the acronym for Secure Hash Algorithm, used for hashing data and certificate files. Every piece of data produces a unique hash that is thoroughly non-duplicable by any other piece of data.

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