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Components
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Key Exchange Method
Name
ECDHE (Elliptic-curve Diffie-Hellman Ephemeral)
Security
Ephemeral Elliptic-curve Diffie–Hellman[432][433] is a variant of Elliptic-curve Diffie–Hellman[114][115] key exchange that has forward secrecy[127][128][129][130], and does protect past sessions against future compromises. If long-term secret keys or passwords are compromised, encrypted communications and sessions recorded in the past cannot be retrieved and decrypted.
Recommendations
Always prefer cipher suites with PFS property over the non-PFS ones. Note that performance considerations implies preferring Ephemeral Elliptic-curve Diffie–Hellman[432][433] over Ephemeral Diffie-Hellman[405][406][407][408].
The symmetric key[185][186][187] withkey size[184] more than 128 bits as it is should be according to National Institute of Standards and Technology[470][471] so it is not vulnerable to preimage attack[67] and it cannreliably prove that message came from the stated sender (its authenticity) and has not been changed, so connection is not open for a man-in-the-middle attack[61].
Recommendations
Remove the cipher suite from the list of cipher suites supported by your server.
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Message Authentication Code
Name
POLY1305
Security
message authentication code[135][136][137][138] is a message authentication code based on universal hashing[150][151][152][153] which is considered secure. It provides authenticated encryption[74] which simultaneously assure the confidentiality[91][92][93] and authenticity[75][76][77] of data. Together with stream cipher[182][183] ChaCha20ChaCha20-Poly1305[328][329][330] gives better performance on mobile devices under the same conditions of security.