> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions.md).

# Encryption, Hashing and Compression Functions

* [AES\_DECRYPT](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/aes_decrypt.md)
* [AES\_ENCRYPT](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/aes_encrypt.md)
* [COMPRESS](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/compress.md)
* [DECODE](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/decode.md)
* [DES\_DECRYPT](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/des_decrypt.md)
* [DES\_ENCRYPT](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/des_encrypt.md)
* [ENCODE](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/encode.md)
* [ENCRYPT](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/encrypt.md)
* [KDF](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/kdf.md)
* [MD5](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/md5.md)
* [OLD\_PASSWORD](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/old_password.md)
* [PASSWORD](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/password.md)
* [RANDOM\_BYTES](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/random_bytes.md)
* [SHA1](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/sha1.md)
* [SHA2](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/sha2.md)
* [UNCOMPRESS](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/uncompress.md)
* [UNCOMPRESSED\_LENGTH](/docs/server/reference/sql-functions/secondary-functions/encryption-hashing-and-compression-functions/uncompressed_length.md)