ocrypto supports the following cryptographic algorithms for HomeKit:
| Algorithm | Specification |
| SRP-6 SHA512 (3072 bit keys) | RFC2945 |
| X25519 (Curve25519) | RFC7748 |
| Ed25519 | RFC8032 |
| AEAD-ChaCha20-Poly1305 | RFC8439 |
| AES | FIPS-PUB-197 |
| AES-CTR | NIST SP 800-38A |
| SHA512 | FIPS-PUB-180-4 |
| SHA256 | FIPS-PUB-180-4 |
| SHA1 | FIPS-PUB-180-4 |
| HMAC-SHA512 | RFC2104 |
| HMAC-SHA256 | RFC2104 |
| HMAC-SHA1 | RFC2104 |
| HKDF-SHA512 | RFC5869 |
| HKDF-SHA256 | RFC5869 |
| HKDF-SHA1 | RFC5869 |
| PBKDF2-SHA1 | RFC8018 |
| SRTP | RFC3711 |