| ??? 02/24/06 20:27 Read: times |
#110724 - the "simple" "encryption" Responding to: ???'s previous message |
Erik Malund said:
With a such, you can not do "random" crypting. You must crypt by x always = y etc. This is a simple and not too effective way; however, can be "tuned up" a bit. Introducing the address bits into the "encoder/decoder" input, the output is slightly more messy. However, purely combinatorial logic such as that can be defeated too easily. An another twist would employ a handful of burried latches, but that would require somewhat more complex "encrypting" device (a small CPLD would do, I've seen done that using a GAL6001 years ago); also the program itself gets somewhat more complicated; and of course one has to write his own "encrypting" tools. Jan Waclawek |
| Topic | Author | Date |
| HOW TO PROTECT SOFTWARE? | 01/01/70 00:00 | |
| When asking questions like yours ALWAYS | 01/01/70 00:00 | |
| Agree with Erik | 01/01/70 00:00 | |
| Agree with Erik & Jack. | 01/01/70 00:00 | |
| a simple test | 01/01/70 00:00 | |
| By using a programmer which supports... | 01/01/70 00:00 | |
| reading correct ? | 01/01/70 00:00 | |
| Maybe all he wants is ... | 01/01/70 00:00 | |
| How do you propose to do this as a condi | 01/01/70 00:00 | |
| Two answers ... | 01/01/70 00:00 | |
| the weekness | 01/01/70 00:00 | |
| HOW TO PROTECT SOFTWARE? | 01/01/70 00:00 | |
| re crypting | 01/01/70 00:00 | |
| re: eric | 01/01/70 00:00 | |
| where ther is a will, there is a way | 01/01/70 00:00 | |
| the "simple" "encryption" | 01/01/70 00:00 | |
| another example : smartcards | 01/01/70 00:00 | |
| Sorry, but you are O.T. | 01/01/70 00:00 | |
| what ????????????????? | 01/01/70 00:00 | |
| Stop misusing this forum! | 01/01/70 00:00 | |
Where are you Jog Milind? | 01/01/70 00:00 |