Nifty. Update notifications packes for PS4 are plaintext.

tcpdump.txt

ETag: "da4bb8afaac733892077087143a7af2c:1417600099"
Last-Modified: Wed, 03 Dec 2014 09:48:19 GMT
Accept-Ranges: bytes
Content-Length: 769
Content-Type: application/xml
Date: Mon, 08 Dec 2014 01:28:49 GMT
Connection: keep-alive

<?xml version="1.0" ?>
<update_data_list>
        <region id="us">
                <force_update>
                        <system level0_system_version="02.030.000" level1_system_version="02.030.000"/>
                </force_update>
                <system_pup label="2.03" version="02.030.000">
                        <update_data update_type="full">
                                <image size="217164288">http://dus01.ps4.update.playstation.net/update/ps4/image/2014_1125/sys_eac5e76be085221159ecbbe21e5022c5/PS4UPDATE.PUP?dest=us</image>
                        </update_data>
                </system_pup>
                <recovery_pup type="default">
                        <system_pup label="2.03" version="02.030.000"/>
                        <image size="795173888">http://dus01.ps4.update.playstation.net/update/ps4/image/2014_1125/rec_2eca5eb6e4b5fdc00b49885e31591f1e/PS4UPDATE.PUP?dest=us</image>
                </recovery_pup>
        </region>
</update_data_list>