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TLS-ECDHE-ECDSA-WITH-CAMELLIA-256-GCM-SHA384 Cipher Suite
A breakdown of the Cipher Suite TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_GCM_SHA384, its strengths, and its weaknesses.
Key Exchange Mechanism
Elliptic Curve Diffie Hellman Ephemeral - ECDHE
Grade - A
ECDHE (Elliptic Curve Diffie-Hellman Ephemeral) is used because it enhances security through the use of ephemeral keys, which are temporary and unique for each session. This ensures that even if one session’s key is compromised, past and future sessions remain secure. ECDHE provides perfect forward secrecy, meaning that the compromise of long-term keys does not affect the confidentiality of past communications. The ephemeral nature of the keys significantly reduces the risk of long-term data breaches and enhances the overall robustness of the cryptographic protocol.
Authentication
Elliptic Curve Digital Signature Algorithm - ECDSA
Grade - A
ECDSA (Elliptic Curve Digital Signature Algorithm) is used in cipher suites for authentication and integrity verification. Its efficiency in generating and verifying digital signatures makes it suitable for secure communication protocols like TLS, ensuring data confidentiality and integrity during exchanges over networks.
Cipher
Camellia - CAMELLIA
Grade - C
Low usage
Hash
Secure Hash Algorithm 384 Bit - SHA384
Grade - A
Improving greatly from SHA1, SHA-256 and above create secure hashes through robust cryptographic algorithms that ensure collision resistance and preimage resistance. They process input data in fixed-size blocks, applying complex mathematical transformations that make it computationally impractical to reverse-engineer the original data from its hash.
Cipher Mode
Galois/Counter Mode - GCM
Grade - A
GCM (Galois Counter Mode) is a mode of operation for block ciphers, offering both encryption and authentication. Widely used in cipher suites, GCM ensures data confidentiality and integrity with high efficiency and performance. It combines the Counter (CTR) mode for encryption with a Galois field-based authentication tag for data integrity. GCM’s parallelizable nature makes it particularly fast and suitable for high-speed networks and secure communications. By incorporating GCM, cipher suites provide robust security against unauthorized access and tampering, making it a preferred choice for modern cryptographic protocols.
