smaheshwar-pltr commented on code in PR #12162:
URL: https://github.com/apache/iceberg/pull/12162#discussion_r1966828077
##########
format/spec.md:
##########
@@ -975,6 +978,23 @@ The unified partition type looks like `Struct<field#1,
field#2, field#3>`.
and then the table has evolved into `spec#1` which has just one field
`{field#2}`.
The unified partition type looks like `Struct<field#1, field#2>`.
+#### Encryption Keys
+
+Encryption keys and metadata required for decrypting the manifest list files
in encrypted tables.
+There are two types of entries:
+1. `key-metadata`: serialized key-metadata of the encrypted manifest list
files. The key-metadata objects include encryption keys and other fields
required to decrypt a file. Since these objects are sensitive, the serialized
key-metadata byte arrays are encrypted by another key. The encryption is done
via the integrity-preserving AES GCM cipher, using the snapshot ID as the AAD
(additional authentication data) parameter. The result of the encryption is
converted to a string via base64 encoding.
Review Comment:
Could use "key metadata" (without the dash) outside of the type but not sure
here, something like:
```suggestion
1. `key-metadata`: serialized key metadata of an encrypted manifest list
file. Key metadata includes encryption keys and other fields required to
decrypt a file. As they are sensitive, serialized key metadata byte arrays are
encrypted by another key. This encryption is achieved via the
integrity-preserving AES GCM cipher, using the snapshot ID as the AAD
(additional authentication data) parameter. The result of the encryption is
converted to a string via base64 encoding.
```
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