ChaCha20-Poly1305 AEAD Tool
ChaCha20-Poly1305 AEAD Tool: Executes 20-round ChaCha stream cipher and computes one-time Poly1305 128-bit authentication tag.
About this chacha20-poly1305 aead tool
Executes 20-round ChaCha stream cipher and computes one-time Poly1305 128-bit authentication tag Runs entirely in-memory using Web Crypto primitives to keep sensitive tokens, certificates, and cryptographic keys secure from third-party interception.
Encoding & cryptographic principles
Performs symmetric encryption and asymmetric public-key operations adhering to NIST FIPS 197 (AES), RFC 7539 (ChaCha20-Poly1305), RFC 8032 (Ed25519 Digital Signatures), and PKCS#1 / RFC 3447 (RSA). AES-GCM provides authenticated symmetric encryption using 128-bit or 256-bit keys and 96-bit initialization vectors (IVs) to ensure confidentiality and cryptographic authentication. Key derivation employs PBKDF2 (RFC 2898) with HMAC-SHA256 and configurable salt iterations to thwart brute-force dictionary attacks.
Worked verification example
Scenario: Encrypt four UTF-8 bytes using public all-zero test key and nonce values; never reuse this nonce with the same key for real messages.
Sample input:
Processing: Validates a 32-byte key and 12-byte nonce before authenticated ChaCha20-Poly1305 encryption; the 16-byte tag follows the ciphertext.
Illustrative output:
Security parameters & input constraints
Missing key/nonce, wrong byte lengths and unsupported operations are rejected. A repeated nonce under one key breaks security; the tool cannot enforce uniqueness across sessions. Ciphertext alteration or wrong key/nonce/AAD fails authentication; key material is shown in the result.
Cryptographic digests, encoded strings, and signatures generated by ChaCha20-Poly1305 AEAD Tool should be verified against target authentication systems before production use.
Client-side Web Crypto boundary
Key derivation, hashing, and encoding in ChaCha20-Poly1305 AEAD Tool execute in local memory using Web Crypto APIs without remote socket transmission.
Cryptographic specifications & RFC standards
Technical specifications and cryptographic RFC standards governing algorithms and key representations:
ChaCha20-Poly1305 AEAD Tool verification · Audit standards
How to use it
- Enter JSON with an explicit 32-byte keyHex, unique 12-byte nonceHex and plaintext; optional aadHex authenticates associated data.
- Run ChaCha20-Poly1305 locally to produce ciphertextHex with its authentication tag appended.
- For decrypt, provide the same key, nonce, AAD and ciphertextHex, then read the plaintext.
Frequently asked questions
Which fields does ChaCha20-Poly1305 Tool require?+
It reads a JSON object with operation, keyHex, nonceHex, optional aadHex, and plaintext or ciphertextHex. Key and nonce must decode to exactly 32 and 12 bytes.
What does encryption return?+
Encryption returns JSON with algorithm ChaCha20-Poly1305, operation encrypt, ciphertextHex, and the effective key, nonce, and optional AAD hex values.
What example can I run locally?+
Using a zero 32-byte key, zero 12-byte nonce, and plaintext CZOA produced a 20-byte ciphertext-plus-tag hex value with the requested parameters preserved.
How does decryption handle invalid authentication data?+
It invokes authenticated decryption. A malformed key/nonce length or invalid ciphertext authentication tag results in an error rather than plaintext.