33128

Product Name

Event ID

33128

Event Source

MSSQLSERVER

Component

SQLEngine

Symbolic Name

SEC_DEPRECATED_ALGO

Message Text

Encryption failed. Key uses deprecated algorithm ’%.*ls’ which is no longer supported.

This message occurs when referencing the RC4 (or RC4_128) encryption algorithm. RC4 and

RC4_128 are weak algorithms and are deprecated. Use a stronger algorithm such as one of the

AES algorithms instead.

When the database compatibility level is 90 or 100, the operation succeeds, the deprecation

event is raised, and the message appears only in the ring buffer.

When the database compatibility level is 110 or higher, decryption operations succeed, the

deprecation event is raised, and the message appears only in the ring buffer. Encryption

operations will fail, the deprecation event is raised, and the message is displayed for the user,

and the message appears in the ring buffer.

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Note

The ring buffer is an internal component which is not fully documented and is not

intended to be used by customers. Messages from the ring buffer are useful when

contacting Microsoft Customer Support. To view the ring buffer, query the

sys.dm_os_ring_buffers dynamic management view.