Weak Cipher Suite

IANA name:

TLS_RSA_WITH_IDEA_CBC_SHA

OpenSSL name:

IDEA-CBC-SHA

Hex code:

0x00, 0x07

TLS Version(s):

TLS1.0, TLS1.1

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Protocol:

Transport Layer Security (TLS)

Key Exchange:

Rivest Shamir Adleman algorithm (RSA)

Authentication:

Rivest Shamir Adleman algorithm (RSA)

Encryption:

IDEA in Cipher Block Chaining mode (IDEA CBC)

Cipher Block Chaining:

The CBC mode is vulnerable to plain-text attacks with TLS 1.0, SSL 3.0 and lower. However a real fix is implemented with TLS 1.2 in which the GCM mode was introduced and which is not vulnerable to the BEAST attack. GCM should be preferred over CBC (cf. BEAST).

Hash:

Secure Hash Algorithm 1 (SHA)

Secure Hash Algorithm 1:

The Secure Hash Algorithm 1 has been proven to be insecure as of 2017 (cf. shattered.io).

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Included in RFC:

• RFC 5469

Machine-readable:

application/json