Sponsored by
Insecure TLS_KRB5_EXPORT_WITH_RC4_40_SHA
- IANA name:
- TLS_KRB5_EXPORT_WITH_RC4_40_SHA
- Hex code:
- 0x00, 0x28
- TLS Version(s):
- TLS1.0, TLS1.1, TLS1.2, TLS1.3
- Protocol:
- Export-grade Transport Layer Security (TLS EXPORT)
- Key Exchange:
- Kerberos 5 (KRB5)
- Authentication:
- Kerberos 5 (KRB5)
- Encryption:
- Rivest Cipher 4 with 40bit key (RC4 40)
- Hash:
- HMAC Secure Hash Algorithm 1 (SHA)
- Included in RFC:
- Machine-readable:
- application/json
Export-grade cipher suite:
Export ciphers used to be legally exportable from the United States of America in the 1990s, when exporting military technology was heavily restricted. Nowadays, they are considered insecure (see freakattack.com).
Non-ephemeral Key Exchange:
This key exchange algorithm does not support Perfect Forward Secrecy (PFS) which is recommended, so attackers cannot decrypt the complete communication stream.
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).