CN109598157A - SSD data guard method and system - Google Patents
SSD data guard method and system Download PDFInfo
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- CN109598157A CN109598157A CN201811472776.8A CN201811472776A CN109598157A CN 109598157 A CN109598157 A CN 109598157A CN 201811472776 A CN201811472776 A CN 201811472776A CN 109598157 A CN109598157 A CN 109598157A
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- ssd
- key
- password
- summary info
- access
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
- G06F21/80—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data in storage media based on magnetic or optical technology, e.g. disks with sectors
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
Abstract
The invention discloses a kind of SSD data guard method and system, method is the following steps are included: SSD firmware loads the summary info H prestored from NAND；Receive input password d；Hash calculation is carried out using the private information and input password d of SSD firmware, the summary info h after output calculating；Judge whether summary info H and summary info h are equal；If unequal, denied access target data；If equal, allow access target data.Access password D and key e is not stored in NAND directly by this programme in the form of plaintext, mix by using the private information and access password of SSD firmware and is converted into summary info H using hash algorithm, key e is subjected to encryption by access key D and is converted into key information E, original access password D can not be obtained by obtaining summary info H in NAND and key information E, also key e can not be obtained, secure user data is improved, guarantees the safety of data.
Description
Technical field
The present invention relates to data security arts, a kind of SSD data guard method and system are especially related to.
Background technique
SSD (solid state hard disk) has been widely used in various occasions, since it is in performance, power consumption, environmental suitability etc.
The outstanding index of aspect, just gradually replaces traditional hard disk.
For SSD, the safety of user data is a critically important topic.It generally can be right inside existing SSD
The data of write-in are encrypted, while access password can also be arranged, and are accessed to avoid illegal user.These are for common use
There is no problem for user data protection, but for the disk of user, genuine/technology fan may possibly still be present some special hands
Duan Jinhang is cracked, to restore password/key, or is bypassed.For the scene relatively high for some security requiremenies, this meeting
Cause great leaking data risk.
As shown in Fig. 1, the typical password of existing SSD and key management method, the specific steps are as follows:
1) user setting password (U_PWD), SSD firmware are written on NAND；
2) encryption key (U_KEY) that user data is generated inside SSD firmware, is written on NAND；
3) when SSD firmware powers on, user inputs access password: U_PWD '；
4) SSD firmware loads U_PWD, U_KEY from NAND；
5) U_PWD ' that user inputs is compared by SSD firmware with U_PWD, if it is inconsistent, authentification failure；
If 6) consistent；It is then subsequent that encryption and decryption is accessed to user data with U_KEY.
Wherein, above-mentioned U_PWD and U_KEY be in plain text deposit on NAND, can be illegally accessed and for not by
The user data of protection accesses, and Information Security is low.
Summary of the invention
In order to solve the defect of the above-mentioned prior art, the object of the present invention is to provide a kind of SSD data guard method and it is
System.
In order to achieve the above objectives, the technical scheme is that
A kind of SSD data guard method, comprising the following steps:
SSD firmware loads the summary info H prestored from NAND；
Receive input password d；
Hash calculation is carried out using the private information and input password d of SSD firmware, the summary info h after output calculating；
Judge whether summary info H and summary info h are equal；
If unequal, denied access target data；
If equal, allow access target data.
Further, after the permission access target data step, comprising the following steps:
SSD firmware loads encrypted key information E from NAND；
Key information E is decrypted using input password d, obtains key e；
Row encryption and decryption is write into using subsequent reads of the key e to target data.
It further, further include following step before the SSD firmware loads the summary info H step prestored from NAND
It is rapid:
Setting access password D；
It is mixed with access password D according to setting rule using the private information of SSD firmware, and carries out Hash calculation and obtain
To summary info H, summary info H is written on NAND.
Further, before the SSD firmware loads encrypted key information E step from NAND, including,
Key e is encrypted to obtain key information E using access password D, and key information E is written on NAND.
Further, the private information using SSD firmware and access password D are according to setting rule progress mixing step
Suddenly, including,
It is mixed with access password D according to setting rule using the sequence number of the every disk of SSD firmware.
The invention also provides a kind of SSD data protection systems, comprising:
First loading unit, for loading the summary info H prestored from NAND by SSD firmware；
Password Input unit, for receiving input password d；
First conversion unit, private information and password d for using SSD firmware carry out Hash calculation, after output calculates
Summary info h；
Judging unit, for judging whether summary info H and summary info h are equal；
Denied access unit is used for when determining unequal, denied access target data；
Allow access unit, for allowing access target data when determining equal.
Further, further includes: the second loading unit, for loading encrypted key from NAND by SSD firmware
Information E；
Key acquiring unit obtains key e for key information E to be decrypted using input password d；
Data decryption unit, for writing into row encryption and decryption using subsequent reads of the key e to target data.
Further, further includes: password setting unit, for access password D to be arranged；
Second conversion unit is mixed with access password D according to setting rule for the private information using SSD firmware
It closes, and carries out Hash calculation and obtain summary info H, summary info H is written on NAND.
It further, further include secret key encryption unit, for being encrypted to obtain key to key e using access password D
Information E, and key information E is written on NAND.
Further, second conversion unit includes conversion module, and the conversion module is used to use the every disk of SSD firmware
Sequence number with access password D according to setting rule mixed.
The beneficial effects of the present invention are: access password D and key e is not stored in directly by this programme in the form of plaintext
In NAND, mixing is carried out by using the private information and access password of SSD firmware and is converted into abstract letter using hash algorithm
H is ceased, key e is carried out by encryption by access key D and is converted into key information E, it can not be by obtaining the summary info H in NAND
Original access password D is obtained with key information E, can not also obtain key e, improves secure user data, guarantees number
According to safety.
Detailed description of the invention
Fig. 1 is the schematic diagram of a kind of existing SSD typical password and key management method；
Fig. 2 is a kind of schematic diagram of SSD data guard method of the present invention；
Fig. 3 is a kind of method flow diagram of SSD data guard method of one embodiment of the invention；
Fig. 4 is a kind of method flow diagram of SSD data guard method of another embodiment of the present invention；
Fig. 5 is the method and step flow chart before step S1 of the present invention；
Fig. 6 is a kind of structural block diagram of SSD data protection system of the present invention；
Fig. 7 is a kind of part-structure block diagram of SSD data protection system of the present invention；
Fig. 8 is a kind of structural block diagram of second conversion unit of the present invention.
Specific embodiment
To illustrate thought and purpose of the invention, the present invention is done further below in conjunction with the drawings and specific embodiments
Explanation.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (up, down, left, right, before and after etc.) of institute is only used in the embodiment of the present invention
It explains in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if the spy
When determining posture and changing, then directionality instruction also correspondingly changes correspondingly, and the connection, which can be, to be directly connected to, can also
To be to be indirectly connected with.
In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and should not be understood as
Its relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.In addition, the technical side between each embodiment
Case can be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution
Conflicting or cannot achieve when occur will be understood that the combination of this technical solution is not present, also not the present invention claims guarantor
Within the scope of shield.
Unless otherwise instructed, "/" herein represents meaning as "or".
Shown in Fig. 1 and 2, in which:
U_PWD represents access password, below to access password D replacement；
U_PWD ' represents input password, below to input password d replacement；
U_KEY represents encryption and decryption key, below with key e replacement；
U_KEY_E is represented using the access encrypted key information of password D, below with key information E replacement；
U_PWD_H represents the summary info being calculated according to access password D, below with summary info H replacement；
U_PWD_H ' represents the summary info being calculated according to input password d, below with summary info h replacement.
Wherein, " hash " is done in Hash calculation, Hash, general translation, and it is exactly any that also having direct transliteration, which is " Hash ",
The input (be called and be preliminary mapping pre-image) of length is transformed into the output of regular length by hashing algorithm, which is exactly
Hashed value.This conversion is a kind of compression mapping, it is, the space of hashed value is generally much less than the space inputted, it is different
Input may hash to identical output, it is impossible to unique input value is determined from hashed value.Briefly it is exactly
A kind of function of the eap-message digest of message compression by random length to a certain regular length.
NAND is a kind of nonvolatile storage technologies, that is, remains to save data after powering off.
Referring to Fig. 2-5, a specific embodiment of the invention proposes a kind of SSD data guard method, comprising the following steps:
S1, SSD firmware load the summary info H prestored from NAND.
S2, input password d is received.
S3, Hash calculation is carried out using the private information and input password d of SSD firmware, the summary info after output calculating
h。
S4, judge whether summary info H and summary info h are equal.
If S5, unequal, denied access target data.
If S6, equal, allow access target data.
For step S1, summary info H is by the way that each disk of pre-set access password D and SSD firmware is own
Private information integration after conversion obtain, and summary info H is stored in NAND, direct will access password different from existing
D is directly stored in NAND in plain text, ensure that the safety of access password D.
It is further comprising the steps of before step S1 with reference to Fig. 5:
S11, setting access password D.
S12, it is mixed with access password D according to setting rule using the private information of SSD firmware, and carries out Hash meter
Calculation obtains summary info H, and summary info H is written on NAND.
S13, key e is encrypted to obtain key information E using access password D, and key information E is written to NAND
On.
For step S12, using SSD firmware private information and the access password D that sets according to setting rule into
Row mixing, and mixed data are subjected to Hash calculation in HASH engine, obtain the summary info H of regular length, third party
Even if obtaining summary info H by the means cracked, corresponding access password D can not be also got, guarantees the peace of data access
Quan Xing.User only correctly inputs password d in input, and the private information that will input password d combination SSD firmware carries out Hash
Calculate the just available summary info h equal with summary info H.
Wherein mixing rule can be user's sets itself and be also possible to set when SSD factory.
Wherein, " hash " is done in Hash calculation, Hash, general translation, and it is exactly any that also having direct transliteration, which is " Hash ",
The input (be called and be preliminary mapping pre-image) of length is transformed into the output of regular length by hashing algorithm, which is exactly
Hashed value.This conversion is a kind of compression mapping, it is, the space of hashed value is generally much less than the space inputted, it is different
Input may hash to identical output, it is impossible to unique input value is determined from hashed value.Briefly it is exactly
A kind of function of the eap-message digest of message compression by random length to a certain regular length.
Step S12 is specifically included: being mixed with access password D according to setting rule using the sequence number of the every disk of SSD firmware
It closes.
The sequence number (SN, Serial Number) of the every disk of SSD firmware is only stored in SSD firmware, can not directly be obtained
It takes.
For step S13, access password D is encrypted by step S12, even if so that third party obtains summary info
H can not also get access password D therein, ensure that the safety of access password D, while using access password D to key e
It is encrypted, guarantees that third party under the premise of not knowing access password, can not also be directly obtained key e, by that will access
Password D and key e are stored encrypted in NAND, ensure that access password D and key e safety, and then ensure that data in SSD
Safety.
The private information of input password d and SSD firmware is used after receiving input password d for step S2-S4
Mixed according to the rule of setting, Hash calculation carried out after mixing, obtain corresponding summary info h, if input password d and
Access that password D is consistent, then the summary info h that calculates and the summary info H prestored can correspond to it is identical, so being plucked by judgement
It wants information H and summary info h whether equal, that is, may know that whether input password is accurate and whether the user has data visit
Ask permission.
For step S5 and S6, allowed according to the judgement result of step S4 or organizing user access SSD in data, protect
Demonstrate,prove Information Security.
Access password D and key e is not stored in NAND directly by this programme in the form of plaintext, solid by using SSD
The private information and access password of part mix and are converted into summary info H using hash algorithm, will be close by access key D
Key e carry out encryption is converted into key information E, can not by obtain NAND in summary info H and key information E it is original to obtain
Access password D, can not also obtain key e, improve secure user data, guarantee the safety of data.
It is further comprising the steps of after step S6 in another specific embodiment of the present invention with reference to Fig. 3:
S7, SSD firmware load encrypted key information E from NAND.
S8, key information E is decrypted using input password d, obtains key e.
S9, row encryption and decryption is write into using subsequent reads of the key e to target data.
Pre- storage is got from NAND after determining to allow to access the target data in SSD for step S7-S9
Key information E, key information E are that key e use is visited made of password D encryption, and is determining summary info H and summary info h
Under the premise of consistent, just representative input password d is consistent with access password D, so can be by input password d to key information E
It is decrypted, obtains corresponding key e, complete the safe transmission of data.
Specifically, access password D and key e is replaced simultaneously and is encrypted in deposit NAND when with changing access password D.
Access password D and key e is not stored in NAND directly by this programme in the form of plaintext, solid by using SSD
The private information and access password of part mix and are converted into summary info H using hash algorithm, will be close by access key D
Key e carry out encryption is converted into key information E, can not by obtain NAND in summary info H and key information E it is original to obtain
Access password D, can not also obtain key e, improve secure user data, guarantee the safety of data.
With reference to Fig. 6-8, the invention also provides a kind of SSD data protection systems, comprising:
First load single 1, for loading the summary info H prestored from NAND by SSD firmware.
Password Input unit 2, for receiving input password d.
First conversion unit 3, private information and password d for using SSD firmware carry out Hash calculation, after output calculates
Summary info h.
Judging unit 4, for judging whether summary info H and summary info h are equal.
Denied access unit 41 is used for when determining unequal, denied access target data.
Allow access unit 42, for allowing access target data when determining equal.
Second loading unit 5, for loading encrypted key information E from NAND by SSD firmware.
Key acquiring unit 6 obtains key e for key information E to be decrypted using input password d.
Data encrypting and deciphering unit 7, for writing into row encryption and decryption using subsequent reads of the key e to target data.
For the first loading unit 1, summary info H is by the way that pre-set access password D and SSD firmware is every
Conversion obtains after the own private information integration of a disk, and summary info H is stored in NAND, directly will different from existing
Access password D is directly stored in NAND in plain text, ensure that the safety of access password D.
Password Input unit 2, the first conversion unit 3 and judging unit 4 are used after receiving input password d
Input password d is mixed with the private information of SSD firmware according to the rule of setting, and Hash calculation is carried out after mixing, is obtained pair
The summary info h answered, if input password d is consistent with access password D, the summary info h calculated and the abstract prestored
Information H can correspond to it is identical, so may know that whether input password by judge whether summary info H and summary info h equal
Accurately and whether the user has data access authority.
For denied access unit 41 and allow access unit 42, is allowed according to the judgement result of judging unit 4 or group
Knit the data in user's access SSD, assuring data security.
For the second loading unit 5, key acquiring unit 6 and data encryption/decryption element 7, determining to allow to access in SSD
Target data after, get the key information E of pre- storage from NAND, key information E is that key e is encrypted using password D is visited
Made of, and under the premise of determining summary info H and summary info h consistent, just represent input password d and access password D mono-
It causes, so key information E can be decrypted by inputting password d, obtains corresponding key e, the safety for completing data passes
It is defeated.
Specifically, access password D and key e is replaced simultaneously and is encrypted in deposit NAND when with changing access password D.
With reference to Fig. 7, a kind of SSD data protection system of the invention further includes password setting unit 8, the second conversion unit 9
With secret key encryption unit 10.
Password setting unit 8, for access password D to be arranged.
Second conversion unit 9 is mixed with access password D according to setting rule for the private information using SSD firmware
It closes, and carries out Hash calculation and obtain summary info H, summary info H is written on NAND.
Secret key encryption unit 10, for being encrypted to obtain key information E to key e using access password D, and by key
Information E is written on NAND.
For the second conversion unit 9, using the private information and the access password D that sets of SSD firmware according to setting
Rule is mixed, and mixed data are carried out Hash calculation in HASH engine, obtains the summary info H of regular length,
Even if third party, which passes through the means cracked, obtains summary info H, corresponding access password D can not be also got, guarantees that data are visited
The safety asked.User only input correctly input password d, by input password d combination SSD firmware private information into
The available summary info h equal with summary info H of row Hash calculation.
Wherein mixing rule can be user's sets itself and be also possible to set when SSD factory.
Wherein, " hash " is done in Hash calculation, Hash, general translation, and it is exactly any that also having direct transliteration, which is " Hash ",
The input (be called and be preliminary mapping pre-image) of length is transformed into the output of regular length by hashing algorithm, which is exactly
Hashed value.This conversion is a kind of compression mapping, it is, the space of hashed value is generally much less than the space inputted, it is different
Input may hash to identical output, it is impossible to unique input value is determined from hashed value.Briefly it is exactly
A kind of function of the eap-message digest of message compression by random length to a certain regular length.
With reference to Fig. 8, the second conversion unit 9 includes conversion module 91, and conversion module 91 is used for the sequence using the every disk of SSD firmware
Row number is mixed with access password D according to setting rule.
For conversion module 91, the sequence number (SN, Serial Number) of the every disk of SSD firmware is to be only stored in SSD firmware
It is interior, it can not directly be acquired.
For secret key encryption unit 10, the second 9 pairs of conversion unit access password D is encrypted so that third party i.e. so that
Access password D therein can not be also got to summary info H, ensure that the safety of access password D, while close using accessing
Code D encrypts key e, guarantees that third party under the premise of not knowing access password, can not also be directly obtained key e,
It is stored encrypted in NAND by the way that password D and key e will be accessed, ensure that access password D and key e safety, and then guarantee
The safety of data in SSD.
Access password D and key e is not stored in NAND directly by this programme in the form of plaintext, solid by using SSD
The private information and access password of part mix and are converted into summary info H using hash algorithm, will be close by access key D
Key e carry out encryption is converted into key information E, can not by obtain NAND in summary info H and key information E it is original to obtain
Access password D, can not also obtain key e, improve secure user data, guarantee the safety of data.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of SSD data guard method, which comprises the following steps:
SSD firmware loads the summary info H prestored from NAND；
Receive input password d；
Hash calculation is carried out using the private information and input password d of SSD firmware, the summary info h after output calculating；
Judge whether summary info H and summary info h are equal；
If unequal, denied access target data；
If equal, allow access target data.
2. SSD data guard method as described in claim 1, which is characterized in that the permission access target data step it
Afterwards, comprising the following steps:
SSD firmware loads encrypted key information E from NAND；
Key information E is decrypted using input password d, obtains key e；
Row encryption and decryption is write into using subsequent reads of the key e to target data.
3. SSD data guard method as claimed in claim 2, which is characterized in that the SSD firmware is loaded from NAND to be prestored
Summary info H step before, it is further comprising the steps of:
Setting access password D；
It is mixed with access password D according to setting rule using the private information of SSD firmware, and carries out Hash calculation and plucked
Information H is wanted, summary info H is written on NAND.
4. SSD data guard method as claimed in claim 3, which is characterized in that the SSD firmware loads encryption from NAND
Before key information E step afterwards, including,
Key e is encrypted to obtain key information E using access password D, and key information E is written on NAND.
5. SSD data guard method as claimed in claim 3, which is characterized in that the private information using SSD firmware with
It accesses password D and carries out mixing step according to setting rule, including,
It is mixed with access password D according to setting rule using the sequence number of the every disk of SSD firmware.
6. a kind of SSD data protection system characterized by comprising
First loading unit, for loading the summary info H prestored from NAND by SSD firmware；
Password Input unit, for receiving input password d；
First conversion unit, private information and password d for using SSD firmware carry out Hash calculation, plucking after output calculating
Want information h；
Judging unit, for judging whether summary info H and summary info h are equal；
Denied access unit is used for when determining unequal, denied access target data；
Allow access unit, for allowing access target data when determining equal.
7. SSD data protection system as claimed in claim 6, which is characterized in that further include:
Second loading unit, for loading encrypted key information E from NAND by SSD firmware；
Key acquiring unit obtains key e for key information E to be decrypted using input password d；
Data encrypting and deciphering unit, for writing into row encryption and decryption using subsequent reads of the key e to target data.
8. SSD data protection system as claimed in claim 7, which is characterized in that further include:
Password setting unit, for access password D to be arranged；
Second conversion unit is mixed with access password D according to setting rule for the private information using SSD firmware, and
It carries out Hash calculation and obtains summary info H, summary info H is written on NAND.
9. SSD data protection system as claimed in claim 8, which is characterized in that further include secret key encryption unit, for using
Access password D encrypts key e to obtain key information E, and key information E is written on NAND.
10. SSD data protection system as claimed in claim 8, which is characterized in that second conversion unit includes conversion mould
Block, the conversion module are used to be mixed with access password D according to setting rule using the sequence number of the every disk of SSD firmware.
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| CN201811472776.8A CN109598157A (en) | 2018-12-04 | 2018-12-04 | SSD data guard method and system |
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| CN201811472776.8A CN109598157A (en) | 2018-12-04 | 2018-12-04 | SSD data guard method and system |
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