Seed generation
Apparatuses, systems, methods, and computer program products are disclosed for seed generation. An apparatus includes a memory element. An apparatus includes a scrambler component. A scrambler component includes a random seed generation circuit that generates a random seed. A scrambler component includes a deterministic seed generation circuit that generates a deterministic seed based on a physical address of a memory element for storing data. A scrambler component includes a computation circuit that forms a computed seed based on a random seed and a deterministic seed. Data is scrambled using a computed seed before data is stored.
1. A method comprising:
generating a seed based on a random seed and an entire physical address of a storage device for storing data, wherein generating the seed comprises:
generating the seed based on the random seed and a hamming code determined using the entire physical address for storing the data; and
transforming the entire physical address so that seeds for physically adjacent addresses have a number of bit differences satisfying a threshold greater than one; and
storing the seed with the data.
2. The method of claim 1 , further comprising scrambling the data using the seed.
3. The method of claim 2 , further comprising storing the data at the physical address.
4. The method of claim 1 , further comprising determining the seed based on information stored at the physical address.
5. The method of claim 4 , further comprising descrambling the data based on the seed.
6. An apparatus comprising:
a memory element; and
a scrambler component comprising:
a random seed generation circuit that generates a random seed;
a deterministic seed generation circuit that generates a deterministic seed based on an entire physical address of the memory element for storing data, wherein:
the deterministic seed is generated by one or more of:
performing a transformation, the result of which is based on the entire physical address; and
by encoding the entire physical address using a non-linear code;
the deterministic seed generation circuit generates the deterministic seed such that the deterministic seed satisfies a minimum distance threshold from another seed for an adjacent physical address; and
the minimum distance threshold comprises the deterministic seed being different from another seed for an adjacent physical address by at least two bits; and
a computation circuit that forms a computed seed based on the random seed and the deterministic seed, wherein the data is scrambled using the computed seed before the data is stored.
7. The apparatus of claim 6 , wherein the random seed generation circuit comprises a random number generator used to generate the random seed.
8. The apparatus of claim 6 , wherein the random seed is generated based on a system clock.
9. The apparatus of claim 6 , wherein the minimum distance threshold comprises the deterministic seed being different from another seed for the adjacent physical address by at least four bits.
10. The apparatus of claim 6 , wherein the deterministic seed generation circuit generates the deterministic seed such that the deterministic seed is not a linear combination of a set of deterministic seeds associated with adjacent physical addresses.
11. The apparatus of claim 6 , wherein the computed seed comprises the random seed.
12. The apparatus of claim 6 , wherein the computed seed comprises a result of a logic operation performed on the random seed and the deterministic seed.
13. The apparatus of claim 12 , wherein the logic operation comprises an exclusive or operation.
14. The apparatus of claim 12 , wherein the computed seed comprises a concatenation of the result of the logic operation and the random seed.
15. An apparatus comprising:
means for generating a random seed;
means for generating a deterministic seed based on an entire physical address for storing scrambled data, wherein:
the deterministic seed is generated by one or more of:
performing a transformation, the result of which is based on the entire physical address; and
by encoding the entire physical address using a non-linear code;
the deterministic seed generation circuit generates the deterministic seed such that the deterministic seed satisfies a minimum distance threshold from another seed for an adjacent physical address; and
the minimum distance threshold comprises the deterministic seed being different from another seed for an adjacent physical address by at least two bits;
means for generating a scrambling seed using the random seed and the deterministic seed;
means for scrambling data using the scrambling seed to produce the scrambled data;
means for storing the scrambled data;
means for extracting the scrambling seed from the scrambled data; and
means for unscrambling the scrambled data using the scrambling seed.
16. The apparatus of claim 15 , wherein the means for extracting the scrambling seed further comprises means for extracting the deterministic seed from the scrambled data.