How deeply does Grokking Relational Database Design cover symmetric key encryption?

Defines reversibility, explains shared keys and algorithms, and names variants without detailing implementation procedures.

Symmetric key encryption

As explained in Grokking Relational Database Design

Symmetric encryption is reversible encryption that uses the same secret key for encryption and decryption.

Symmetric-key encryption protects sensitive data that must later be used in its original form. It encrypts and decrypts data with the same secret key and algorithm. section 7.4

Saved credit-card details

An online store encrypts a customer’s credit-card information before storing it. When the customer places another order, the application uses the secret key to decrypt the stored value instead of asking for the card again. The key must remain secret and be handled properly. section 7.4

Common points to remember:

Use symmetric encryption when protected information must be recovered repeatedly or periodically. section 7.4
Recognize AES, 3DES, and Blowfish as common symmetric algorithms; AES includes 128-, 192-, and 256-bit variants. section 7.4

How Grokking Relational Database Design covers it

Cover of Grokking Relational Database Design

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Also explained in

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Real-World CryptographySymmetric encryption is an encryption technique in which the same secret key, or equivalent shared secret, is used for encryption and decryption.
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Hacking CryptographyCryptography in which communicating parties use the same secret key or shared secret for corresponding cryptographic operations.
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Software Security for DevelopersSymmetric key cryptography uses the same secret key, or closely related shared keys, to protect and recover data.
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Server-Side WebAssemblySymmetric encryption is encryption in which the same secret key is used for both encryption and decryption.
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Data Pipelines with Apache Airflow, Second EditionSymmetric encryption is encryption that uses the same secret key for encryption and decryption.

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Related concepts

public key cryptographycontrasts with · Public-key cryptography is asymmetric cryptography that uses mathematically related public and private keys for encryption, decryption, signing, and verification.
TLSused by · Transport Layer Security (TLS) is a cryptographic protocol that protects network communications through confidentiality, integrity, and authentication of communicating endpoints.
encryptionkind of · Encryption is the cryptographic transformation of readable data into ciphertext to conceal its contents, reversible through decryption with appropriate information.
API keyuses · An API key is a credential used to identify or authorize a client accessing an application programming interface.
AESincludes · AES is a standardized symmetric block cipher that encrypts and decrypts data in 128-bit blocks using 128-, 192-, or 256-bit keys.
cryptographic keyuses · A cryptographic key is a value supplied to a cryptographic algorithm to control operations such as encryption, decryption, signing, authentication, or verification.

This explainer was generated by Manning's knowledge graph from the text of Grokking Relational Database Design. The section links point to the parts of the book it draws on.