HAS-DS | 128/112 | Orb: 512 Clk: 448 | Orb: 16 + 2 Clk : 2 + 1 [pages] | Orb: 512b DS + 524b OTAR/spare Clk: 448b DS + 56b OTAR/spare | 16.1 bps | Both messages signed with DS. Clk DS reduced from 512 to 448 bits to fit in one page (+ spare). |
HAS-DD | 128 | Orb: 512 Clk: 168 | Orb: 16 + 1 Clk : 2 + 1 [pages] | Orb: 512b DS + 100b OTAR/spare
Clk: 128b Key + 40b MAC + 336b OTAR/spare | 35.6 bps | Hybrid scheme: MT1-orb signed with DS. MT1-clk based on 10-second-delay TESLA, use-then-authenticate. Assumption: 40-bit MACs, 128-bit keys. Loose time sync required in receiver. TESLA root key signature included in OTAR. |
CLAS-DS | 128 | 512 | 1 [subframe] | SF1-5: 512b DS SF6: 512b DS + 804b OTAR/spare | 26.8 bps | Messages in subframe signed with DS. |
CLAS-DD | 128 | 168 | 1 [subframe] | SF1-5: 128b Key + 40b MAC, SF6: 128b Key + 40b MAC + 804b OTAR/spare | 26.8 bps | Messages in sub-frame are authenticated with 5-second delay TESLA, use-then-authenticate. Assumption: 40-bit MACs, 128-bit keys. Loose time sync required in receiver. TESLA root key signature included in OTAR. |