Insecure TLS_ECDHE_RSA_WITH_RC4_128_SHA
- IANA name:
- TLS_ECDHE_RSA_WITH_RC4_128_SHA
- GnuTLS name:
- TLS_ECDHE_RSA_ARCFOUR_128_SHA1
- Hex code:
- 0xC0, 0x11
- TLS Version(s):
- TLS1.0, TLS1.1, TLS1.2, TLS1.3
- Protocol:
- Transport Layer Security (TLS)
- Key Exchange:
- PFS Elliptic Curve Diffie-Hellman Ephemeral (ECDHE)
- Authentication:
- Rivest Shamir Adleman algorithm (RSA)
- Encryption:
- Rivest Cipher 4 with 128bit key (RC4 128)
- Hash:
- HMAC Secure Hash Algorithm 1 (SHA)
- Included in RFC:
- Machine-readable:
- application/json
RSA Authentication:
There are reports that servers using the RSA authentication algorithm with keys longer than 3072-bit may experience heavy performance issues leading to connection timeouts and even service unavailability if many clients open simultaneous connections.
Rivest Cipher 4:
IETF has officially prohibited RC4 for use in TLS in RFC 7465. Therefore, it can be considered insecure.
Secure Hash Algorithm 1:
The Secure Hash Algorithm 1 has been proven to be insecure as of 2017 (see shattered.io).