ConceptsCryptography

Cryptography

The science of protecting information using mathematical techniques, providing confidentiality through encryption, integrity through hashing, and authenticity and non-repudiation through signatures. It underpins nearly all modern security.

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Key

The foundation Cryptography builds on, worth understanding first.

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In cryptography, the secret (or paired secret/public) value that controls an algorithm's operation, determining how data is encrypted, decrypted, signed, or verified. The security of cryptography rests on protecting keys, not on hiding the algorithm.

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Relatedsorted by lesson coverage

Integrity

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Non-Repudiation

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Authenticated Encryption

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Symmetric Encryption

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EdDSA

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Argon2

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Show 7 more connections

bcrypt

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Certificate

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Encryption

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Hardcoded Keys

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Homemade Cryptography

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One-Way Functions

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Side Channels

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Related Lessons

7 lessons cover this concept

Cryptography Purpose and Defender Context

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Symmetric Cryptography

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Asymmetric Cryptography

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Hashing Versus Encryption

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Digital Signatures and Message Authentication

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TLS, Certificates, and PKI

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Common Cryptography Failure Modes

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