🔐 Cryptography & Encryption

Cryptographic Key Length Reference

Reference common key sizes for AES, RSA and elliptic curves.

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Key size alone does not make a system secure; algorithm, mode, implementation and key management matter.

Item	Value	Guidance
AES-128	128-bit	Strong symmetric security; common minimum.
AES-192	192-bit	Less commonly used, strong.
AES-256	256-bit	Common high-strength choice.
RSA-2048	2048-bit	Common RSA minimum; plan based on lifetime/risk.
RSA-3072	3072-bit	Stronger RSA option.
RSA-4096	4096-bit	Higher computational cost.
ECDSA P-256	~128-bit classical security	Common elliptic-curve signature choice.
ECDSA P-384	~192-bit classical security	Higher-strength curve.

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How to use this calculator

What to enter

Review the available algorithms, properties, key sizes, compatibility notes, and recommended use cases shown on the page. Match the guidance to your protocol, threat model, and current platform support rather than selecting an algorithm by name alone.

What the result means

The cryptography result or reference describes the encoding, key, digest, entropy, or algorithm selected and the input supplied. Encoding is not encryption, and a generated value is only as secure as the randomness, implementation, and handling behind it.

When to use it

Use this for learning, format conversion, or preliminary cryptographic planning. Verify algorithms and key sizes against current security guidance; never expose private keys, production secrets, or live credentials in an untrusted tool.