Sure. Take for example the first Encryption Tech, which has amongst its effect this:
- 15% IntOp Chance Them
And the first Decryption Tech, which has;
+ 25% IntOp Chance Us
So, with both these techs, you get a 25% increase to your probability of sucessfully carrying out an espionage mission, and your opponents get a -15% decrease. So for example, if you have a 10% probability of stealing a blueprint, and then you complete the Decryption Tech and everything else remains in statis, the next day you will have a 12.5% chance of stealing a blueprint. I'm fairly positive this is how it works. Certainly, you can replicate what I'm describing in-game (as I have done) to see the effect from one day to the next.