· 2 min read

TLS-DHE-PSK-WITH-ARIA-256-GCM-SHA384 Cipher Suite

A breakdown of the Cipher Suite TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384, its strengths, and its weaknesses.

Key Exchange Mechanism

Diffie Hellman Ephemeral - DHE

Grade - B

Diffie-Hellman Ephemeral (DHE) in cipher suites refers to a key exchange method where each session generates temporary, one-time-use (ephemeral) keys. This ensures forward secrecy, meaning if one session’s key is compromised, past and future sessions remain secure. DHE provides an added layer of protection against decryption by ensuring keys are used briefly and then discarded, enhancing security in TLS communications.

Authentication

Pre-Shared Key - PSK

Grade - A

PSK (Pre-Shared Key) cipher suites are used for authentication in secure communication protocols like TLS. They allow parties to establish a shared secret beforehand, ensuring confidentiality and integrity of data exchanges without the overhead of public key infrastructure (PKI), suitable for constrained environments or specific security requirements.

Cipher

AEGIS - ARIA

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.

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