Everyone in the media knows the government has a database of every phone call, message, email, bank transaction, etc... on everyone of them. All it takes is a wink and nod and a mention of a name and it’s the end.
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(hat tip gregnh) If a name is unmasked we know a lot of information, or lack thereof.
When a name is unmasked detailed records are made and kept.
• Who requested the unmasking.
• Must be an authorized person by written request.
• Request must state a "reason."
• Who did the actual unmasking.
• The original collector of the name.
• Name of the "intelligence agency," who agrees with the "reason!"
• When each act occurred.
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Ergo, if Rice is on-record as having signed the log to review secure documents, she can neither claim 5A or Exec-Privilege. (hat tip Cletus D. yokel)