Cryptographic hash

As explained in Build Python Web Apps with Streamlit

A cryptographic hash function transforms input into a fixed-looking digest such that recovering the original input is computationally difficult.

How Build Python Web Apps with Streamlit covers it

How deep it goes

Explains one-way behavior and demonstrates bcrypt storage and verification, without descending into hashing algorithms’ mathematics.

Examples

Uses a password-to-digest comparison, a bcrypt User model, and a database row containing a password_hash.

What it assumes

Assumes passwords and database storage, while teaching the security problem and one-way hashing from a plain-language analogy.

What you can do after

Apply bcrypt to store password hashes and verify entered passwords in a Python authentication service.

How it connects

Connects password security with databases, authentication, user services, and one-way functions.

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Also explained in

• 

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  Software Security for DevelopersA cryptographic hash function maps input data to a fixed-size digest designed to detect changes while resisting reversal and collision generation.
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  Real-World CryptographyA hash function designed to provide security properties such as collision resistance, pre-image resistance, and second pre-image resistance.
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  The Well-Grounded Python Developer: How the pros use Python and FlaskA cryptographic hash is a one-way transformation that maps data to a fixed-format digest designed to make recovery of the original data computationally difficult.

Compare how 4 books explain cryptographic hash →

Related concepts

• hash functionproduced by · A hash function deterministically maps input data to a value in a bounded output range, commonly for indexing, lookup, comparison, or integrity checking.
• secure hash algorithmincludes · The Secure Hash Algorithm is a family of standardized cryptographic hash functions that map input data to fixed-size digests.
• hash valueproduces · A hash value is a deterministic, typically fixed-size value produced by applying a hash function to input data, often for lookup, comparison, identification, or integrity checking.
• hexadecimal numberuses · A hexadecimal number is a numeral represented in the base-sixteen positional system using symbols 0–9 and A–F for values zero through fifteen.
• data corruptionaddresses · Data corruption is the unintended alteration, loss, or damage of data that makes it inaccurate, invalid, inconsistent, or unusable.

This explainer was generated by Manning's knowledge graph from the text of Build Python Web Apps with Streamlit. The section links point to the parts of the book it draws on.