If I were in the habit of ever talking about that stuff I suppose I'd call it "dox your customer." As applied to banks it seems not so bad, but they keep expanding it to new types of business.
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Banks are rediculous. They will send me a text message with my account number partially obfuscated but won't send me a pdf statement via email with an obfuscated account number (or better yet the alias I bothered to populate) because its poor security.
The transaction data should be treated as sensitive too. But that should not stop them. If banks were technically competent, you would be able to get email-delivered statements that use either PDF’s AES encryption based on a symmetric key, or as an openpgp msg.
I don't even see that as necessary. without the account number there is nothing really sensitive in it. that being said it would be a big step up if they did the encrypted pdf as long as you could decrypt them without running around to a bunch of other places. So I could see getting the key from the portal for emails from them but they should not change it for every email so once I had it I should be able to save them from my email client without any more fuss. Unfortunately when institution sends encrypted communications they tend to use yet another portal which makes the whole thing even worse.
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