Knowledge Base

A-

Cipher Suite: TLS_­DHE_­RSA_­WITH_­SALSA20_­SHA1

Summary

Name:
TLS_DHE_RSA_WITH_SALSA20_SHA1
IANA Name:
TLS_DHE_RSA_WITH_SALSA20_SHA1
Code:
(0xe4, 0x1f)
OpenSSL Name:
Protocol Versions:
TLS 1.0,TLS 1.1,TLS 1.2

Check your host!

Type a URL to analyze a service

Get a prompt and clear overview of your security configuration. Right now!

Components

A+
Key Exchange Method
Name

DHE (Diffie-Hellman Ephemeral)

Security

Ephemeral Diffie-Hellman[405][406][407][408] is a variant of Diffie-Hellman[99][100][101][102][103] key exchange[133] protocol 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].

A+
Authentication Method
Name

RSA

Security

Rivest–Shamir–Adleman[275][276][277] is a digital signature[107][108][109][110] algorithm, which is considered secure, however there are known weaknesses[278][279][280][281][282].

A+
Encryption Type
Name

Salsa20

Security

The stream cipher[182][183] Salsa20[380][381][382] is considered secure [383] and gives better performance for mobile devices.

Recommendations

Prefer stream cipher[182][183] Salsa20[380][381][382] and it's variants (eg: ChaCha20[324][325][326][327]) in case of mobile devices.

A+
Encryption Key Size
Name

256

Security

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.

A-
Message Authentication Code
Name

SHA-1

Security

message authentication code[135][136][137][138] is a hashed message authentication code[139][140][141][142][143][144][145] which is considered secure[462], despite the fact that the underlayingcryptographic hash function[94][95][96][97] (Secure Hash Algorithm 1[202][203][204]) is considered insecure[205][206][207][208][209][210][211].

Recommendations

If your application or requirements specifically call for the use of a message authentication code[135][136][137][138] that does not provide authenticated encryption[74] prefer block cipher mode of operation[82][83][84][85][86] (eg: counter with CBC-MAC[32][33][34], Galois/Counter Mode[46][47][48][49] or message authentication code[135][136][137][138] (eg: Poly1305[458][459]) that proved authenticated encryption over the ones which does not provide it. In case of a hashed message authentication code[139][140][141][142][143][144][145] prefer message authentication code[135][136][137][138] based on Secure Hash Algorithm 2[212][213][214] over the ones based on Secure Hash Algorithm 1[202][203][204].